EMHART TEKNOLOGIES

EMHART TEKNOLOGIES
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®
Heli-Coil® Inserts
Heli-Coil Free Running and Screw Lock Inserts are the original.
Heli-Coil inserts have developed from their beginnings in the aerospace market over 75 years ago when
Heli-Coil provided the solution to failing threaded assemblies in aircraft engines and ultimately led to
improved engine design and performance.
Today Heli-Coil produces a vast range of high quality inserts and installation tools to meet the
needs of the industry’s ever demanding designers and manufacturers. With Heli-Coil threads, tapped
holes are strengthened and thread life is dramatically increased.
Heli-Coil products are commonly used in OEM design in the Aerospace, Electronics, Automotive,
Communication, Defense & Energy industries but also used to permanently repair damaged threads.
The Heli-Coil offering now includes both Tanged and Tangless Inserts and are available in a variety of
materials: Stainless Steel, Inconel X750, Phosphor Bronze, Nitronic 60 and Titanium.
Heli-Coil® Manual and Power Tools
Heli-Coil offers a complete line of tooling together with a full array of STI taps, gages and tang
break-off tools.
For production runs, prototype work, salvage and repair, Heli-Coil offers a range of installation and
extraction tools for both tanged and tangless inserts to complete the needs of your application.
For higher volume production, we offer both electronic and pneumatic power inserting tools.
Heli-Coil power tools can be adapted to assembly stations, rotary tables and transfer lines.
Our application engineers are always available to assist in installation techniques and special tooling.
Quality
Our strict quality programs ensure that we meet the latest industry standards of ISO/TS 16949:2002,
ISO 14001:2004, AS/EN/JISQ9100 Rev B and ISO 9001:2008. A comprehensive Business Management
System elevates our quality levels well above our competitors.
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Table of Contents
Page
Insert Information & Specifications
Introduction to Heli-Coil...............................................................................................................
2
4
5
6
6
6
6
7
8
9
10
11
Types of Inserts, Tanged and Tangless.........................................................................................
Tanged and Tangless Inserts, Features & Benefits .....................................................................
Locking Inserts, Feature and Benefits..........................................................................................
UÊScrew-Locking Inserts..................................................................................................
UÊHi-Torque Inserts..........................................................................................................
UÊStud-Lock Inserts..........................................................................................................
Industry Standards and Specifications.........................................................................................
Coatings & Platings......................................................................................................................
Insert Materials............................................................................................................................
Torque Data for Screw Locking Inserts........................................................................................
Design Data and Guidelines.........................................................................................................
UÊAssembly Strength
UÊCorrosion Protection
Tanged Inserts, Part Numbers and Specifications, inch & metric............................................... 12-13
Tangless Inserts, Part Numbers and Specifications, inch...........................................................
14
Thread Repair Kits and Master Sets............................................................................................
15
Insert Installation
16
Assembly Design..........................................................................................................................
Engineering Data..........................................................................................................................
17
UÊDrilling, Countersinking, Tapping, Gaging
Drilling Data, inch & metric.......................................................................................................... 18-19
Tapping Data, inch & metric......................................................................................................... 20-21
STi Tap Part Numbers, inch..........................................................................................................
22
STi Tap Dimensions, inch.............................................................................................................
23
STi Tap Part Numbers, metric......................................................................................................
24
STi Tap Dimensions, metric.........................................................................................................
25
Gages, inch and metric................................................................................................................
26
Gages, metric...............................................................................................................................
27
Installation Tooling
Types of Tools, Tool Service..........................................................................................................
28
Hand Installation Tools.................................................................................................................
29
Power Installation Tools, inch & metric....................................................................................... 30-32
Tang Removal Tools......................................................................................................................
33
Tangless Tools...............................................................................................................................
34
The descriptions, specifications and other claims made with respect to the products featured in this catalog
are made as of the date of printing. Emhart retains the right to discontinue production or make improvements
or other changes to any of its products without notice.
HeliCoil® Tangless® inserts are licensed from Kato.
EMHART TEKNOLOGIES
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Heli-Coil® screw thread inserts
Types of Inserts
There are two styles of Heli-Coil inserts.
The standard or FREE RUNNING Insert
which provides a smooth free-running
thread; and SCREW-LOCKING – which
provides self-locking torque on the male
member by a series of “chords” on one
or more of the insert coils. They are both
available in Tanged and Tangless; Inch
series, coarse and fine; Metric series,
coarse and fine. Inch series Screw-Locking
inserts are dyed red for identification.
/>˜}i`ÊÀiiÊ,՘˜ˆ˜}ʘÃiÀÌ
Tanged Screw-Locking Insert
Heli-Coil inserts are precision formed coils of extremely hard,
diamond shaped 304 stainless steel. When installed into an STi
tapped hole, they provide permanent conventional 60° internal screw
threads. This assembled insert accommodates any standard bolt or
screw as per MIL-S-7742 and AS8879 (UNJ controlled root radius
Inserts can be custom made in all materials listed on p. 9.
Tangless inserts eliminate the need
for tang break-off and retrieval. Since
no loose tangs are left behind, they
LiVœ“iÊ̅iÊ܏Ṏœ˜Ê܅i˜ÊœÀiˆ}˜Ê
"LiVÌÊiLÀˆÃÊ­"®ÊV>˜˜œÌÊLiÊ«ÀiÃi˜ÌÊ
in critical applications. Loose tangs
can potentially cause damage and
result in the need for costly repairs.
Heli-Coil inserts are larger in diameter before installation than the
tapped hole. During installation the inserting tool applies torque to
the tang reducing the diameter of the leading coil permitting it to
enter the tapped thread. After installation, each high tensile coil of
the insert expands outward with a spring-like action permanently
anchoring the insert.
Tangless inserts are manufactured
using the same materials as standard
inserts and provide the same superior
performance characteristics. They
>ÀiÊ>Û>ˆ>Liʈ˜ÊÀiiÊ,՘˜ˆ˜}Ê>˜`Ê
Screwing Locking and in inch series,
coarse and fine.
ÕÃÌÀ>̈œ˜ÊœvÊ̅iÊ,iÌi˜Ìˆœ˜Ê*Àˆ˜Vˆ«i
Diamond Shaped Wire
/>˜}iÃÃÊÀiiÊ,՘˜ˆ˜}ʘÃiÀÌ
Tanged Size Range:
UÊÊ1 ʛ£Ê̅ÀœÕ}…Ê£‡£ÉÓÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊUÊÊ1 ʛÓÊ̅ÀœÕ}…Ê£‡£ÉÓ
Tangless Size Range:
UÊÊiÌÀˆVÊ
œ>ÀÃiÊÓÊ̅ÀœÕ}…ÊΙÊÊUÊÊiÌÀˆVʈ˜iÊnÊ̅ÀœÕ}…ÊΙ
UÊÊ1 ʛÓÊ̅ÀœÕ}…Ê£É{ÊÊÊÊUÊÊ1 ʛ£äÊ>˜`Ê£É{
˜ÃiÀÌÃÊ>ÀiÊ>ÃœÊ>Û>ˆ>Liʈ˜Ê1 ]Ê1 -]Ên1 ]Ê£Ó1 ]Ê£È1 ]Ê-«>ÀŽÊ*Õ}Ê>˜`Ê*ˆ«iÊ/…Ài>`°
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Heli-Coil® screw thread inserts
FEATURES & BENEFITS
Heli-Coil inserts provide a positive means for protecting and
strengthening tapped threads in any material. The unique design
features of the insert offer many benefits.
Stronger Assemblies
Tapped threads are strengthened because the inherent flexibility of
the insert provides a more balanced distribution of dynamic and static
loads throughout the length of thread engagement. This flexibility also
compensates for variation in lead and angle error allowing each coil to
carry its share of the load.
No Thread Wear
Thread life is dramatically increased even after repeated assembly
and disassembly because the insert hardness and surface finish
practically eliminate erosion of the thread form due to friction.
Corrosion Resistance
Under normal environmental conditions, Heli-Coil inserts minimize
galvanic action within the threaded assembly because of their superior
corrosion resistance.
Design Flexibility
Bolt tensile strength can be balanced against parent material shear
strength, assuring bolt failure rather than parent material damage.
Five insert lengths are available in each thread size.
Eliminate Stress
Virtually no stress is introduced into the parent material because there is
no staking, locking, swaging or keying in place – the outward spring-like
action of the insert holds it in place.
Minimize Space & Weight
Heli-Coil inserts allow use of smaller bosses, flanges and fasteners than
any other insert. Heli-Coil inserts can generally be incorporated in existing
designs, where no provision has been made for an insert, without
increasing boss size.
Minimize Total Cost
Cost savings abound. Lower insert cost, lower installation cost and
Heli-Coil inserts provide design flexibility by allowing a wide choice of
parent materials while maintaining maximum threaded assembly strength.
True Clamping Torque
Maximum clamping action and bolt tension are assured with minimum
wrench torque because of the mirror-smooth surface finish of Heli-Coil inserts.
Wide Temperature Range
Heli-Coil stainless steel inserts can be used in temperatures ranging
from –320°F to +800°F.
High Volume Production
Heli-Coil inserts are available
mounted on plastic strips and wound
onto reels (500 or 1000 inserts
per reel). With power installation
tooling, use of strip feed inserts will
substantially increase installation
rates by minimizing handling.
Universal Acceptance
Heli-Coil Standard and ScrewLocking Inserts are the original – and
have an extensive background of
tension, torque, shear, vibration and
fatigue tests conducted by American
industry’s leading companies as
well as the U.S. Military. Successful
applications in the fields of aviation,
electronics, industrial, automotive
and military equipment provide a
wealth of experience and confidence
in the performance and reliability of
Heli-Coil inserts.
Custom Design Services
In addition to the benefits listed
above, Heli-Coil provides a wide
range of support to solve fastening
problems. This design catalog is
one of them. The following pages
are presented in a manner to make
it easy to “design-in” Heli-Coil
inserts to take advantage of the
extraordinary benefits they provide.
Additionally, our Sales Engineers,
Applications Engineers and
Design Engineers are available for
consultation for specific designs.
When the product gets to the
manufacturing phase, our extensive
experience in production tooling and
installation techniques ensures that
you can indeed make your product
better with Heli-Coil inserts.
Quality & Reliability
Stringent Quality Assurance and Engineering Standards are rigidly
enforced in all phases of the manufacturing process. This assures
integrity of your product design.
EMHART TEKNOLOGIES • 50 Shelton Technology Center, Shelton, CT 06484 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhart.com
Page 5
Heli-Coil® screw locking inserts
LOCKING INSERTS
Heli-Coil offers three types of Locking Inserts for multiple applications.
Screw-Locking Inserts
UÊ ÊÀiȏˆi˜ÌʏœVŽˆ˜}ʓiV…>˜ˆÃ“ÊÊ̅>ÌÊ}Àˆ«ÃÊ̅iÊLœÌÊ>˜`Ê«ÀiÛi˜ÌÃʈÌÊvÀœ“
loosening under vibration or impact.
UÊ ,i«i>Ìi`Ê>ÃÃi“LÞÊ>˜`Ê`ˆÃ>ÃÃi“LÞÊ܈̅œÕÌÊ
appreciable loss of positive self-locking torque.
UÊ ->ۈ˜}Ãʈ˜Êë>Vi]ÊÜiˆ}…ÌÊ>˜`ʓœ˜iÞ]Ê̅ÀœÕ}…Ê̅iÊÊ
Ê
Ê
elimination of lock wiring, lock nuts, lock washers,
chemical compounds, plastic pellets/patches
and/or other locking mechanisms.
UÊ iiÌÃÊNASM8846, MA1565.
Ê
The locking action is achieved
by one or more of the insert coils
having a series of straight segments
or “chords”.
Hi-Torque Inserts
UÊ -ˆ“ˆ>ÀÊ̜Ê-VÀi܇œVŽÊLÕÌÊ܈̅ʅˆ}…iÀÊ«ÀiÛ>ˆˆ˜}Ê̜ÀµÕiÊ܅ˆV…ÊVœ“«i˜Ã>ÌiÃÊ
for reduced friction in highly lubricated applications.
UÊ `i>ÊvœÀʅˆ}…iÀÊۈLÀ>̈œ˜Ê>««ˆV>̈œ˜Ã°
UÊ ««ÀœÝˆ“>ÌiÊ{ä¯Êˆ˜VÀi>Ãiʈ˜ÊÊ«ÀiÛ>ˆˆ˜}Ê̜ÀµÕiʏiÛiÃ°
UÊ Û>ˆ>Liʈ˜Ê›£äÊ̅ÀœÕ}…ÊÎÉn¸Ê1 ʜ˜Þ°
UÊ iiÌÃÊAS1394, AS3094, AS3095, AS3096, AS3097.
When the bolt enters the “grip” coil,
these chordal segments flex outward,
creating pressure on the bolt. The
pressure is exerted between the flanks
of the bolt thread to establish an
extensive positive and consistent
self-locking torque over more cycles
than any other prevailing torque
mechanism.
Stud-Lock Inserts
U
UÊ
UÊ
UÊ
UÊ
UÊ
Highest prevailing torque insert available.
˜>LiÃÊÕÃiʜvÊ̅Ài>`i`ÊÀœ`ÊvœÀÊë>Vi‡Ã>ۈ˜}ÊÃÌÕ`Ê>««ˆV>̈œ˜Ã°
œÜÃÊvœÀÊ>˜ÞÊV>ÃÃÊwÌʜvÊ̅Ài>`i`ÊÀœ`°
ˆ“ˆ˜>ÌiÃʈ˜Vœ˜ÃˆÃÌi˜VˆiÃÊV>ÕÃi`ÊLÞʈ˜ÌiÀviÀi˜Vi‡wÌÊÃÌÕ`ð
Û>ˆ>LiÊvœÀÊLœÌ…ÊÃÌÀ>ˆ}…ÌÊ>˜`ÊÃÌi«ÊÃÌÕ`Ã]ʛ£äÊ̅ÀœÕ}…Ê£ÉÓ¸Ê1 Ê>˜`Ê1 °
iiÌÃÊAS1229, AS3080, AS3081, AS3082, AS3083.
LOCKING FEATURES & BENEFITS
Locks Adjustment
Screws. This simple
design allows
permanent, positive
adjustment of screws
in any position.
Secure against
vibration or impact.
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Inaccessible or
Miniaturized
Assemblies. Heli-Coil
Screw-Lock inserts
permit the installation
of the lock from the
front or top. No blind
fumbling for assembly
of lock washers or
lock nuts behind or
underneath.
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Lock Set Screws.
*œÃˆÌˆÛiÞʏœVŽÃÊ
assembly against
loosening at desired
>`ÕÃ̓i˜Ì°Ê*ÀœÌiVÌÃÊ
threads against
stripping under high
̜ÀµÕi°Ê*iÀ“ˆÌÃÊÕÃiʜvÊ
light housing materials.
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Heli-Coil® industry standards
INDUSTRY STANDARDS
Heli-Coil inserts and tooling comply with the following Standards and Specifications:
NASM122076 thru NASM122275
Insert, corrosion resistant Helical Coil Coarse Thread
­˜V…Ê-iÀˆiî
NAS1130
˜ÃiÀÌÃ]Ê-VÀiÜÊ/…Ài>`]ÊiˆV>Ê
œˆ]ÊÀiiÊÊ,՘˜ˆ˜}Ê
>˜`Ê-VÀiÜʜVŽˆ˜}Ê­˜V…Ê-iÀˆiî
NASM124651 thru NASM124850
˜ÃiÀÌ]ÊVœÀÀœÃˆœ˜ÊÀiÈÃÌ>˜ÌÊiˆV>Ê
œˆÊˆ˜iÊ/…Ài>`Ê
­˜V…Ê-iÀˆiî
FED-STD-H28
-VÀiÜÊ/…Ài>`Ê-Ì>˜`>À`ÃÊvœÀÊi`iÀ>Ê-iÀۈViÃ
AS1394 thru 3097
NASM21209
˜ÃiÀÌ]Ê-VÀiÜÊ/…Ài>`]Ê-ivʜVŽˆ˜}Ê­˜V…Ê-iÀˆiî
AS1229 thru 3083
Special Locking Torque Inserts
NASM33537
˜ÃiÀÌ]Ê-Ì>˜`>À`ʈ“i˜Ãˆœ˜Ã]ÊÃÃi“LÞÊ­˜V…Ê-iÀˆiî
ASME B18.29.1
˜ÃiÀÌ]Ê-VÀiÜÊ/…Ài>`]ÊiˆV>Ê
œˆÊ­˜V…Ê-iÀˆiî
NASM8846
˜ÃiÀÌ]Ê-VÀiÜÊ/…Ài>`]ÊiˆV>Ê
œˆÊ­˜V…Ê-iÀˆiî
ASME B18.29.2M-2005
iˆV>Ê
œˆÊ-VÀiÜÊ/…Ài>`ʘÃiÀÌÃ]ÊÀiiÊ,՘˜ˆ˜}Ê>˜`Ê
-VÀiÜʜVŽˆ˜}Ê­iÌÀˆVÊ-iÀˆiîÊ
MA1565
˜ÃiÀÌ]Ê-VÀiÜÊ/…Ài>`]ÊiˆV>Ê
œˆÊ­iÌÀˆVÊ-iÀˆiî
MA1567
Insert, Screw Thread, Helical Coil, Standard Dimensions,
ÃÃi“LÞÊ­iÌÀˆVÊ-iÀˆiî
MA3279, 3280, 3281
˜ÃiÀÌ]Ê-VÀiÜÊ/…Ài>`]ÊiˆV>Ê
œˆ]ÊÀiiÊ,՘˜ˆ˜}Ê
­iÌÀˆVÊ-iÀˆiî
AGS3600-3699
Insert, Screw Thread, Screw Locking, Helical Coil,
>`“ˆÕ“Ê*>Ìi`Ê­˜V…Ê-iÀˆiî
AGS4677 Series
Insert, Screw Thread, Screw Locking, Helical Coil,
>`“ˆÕ“Ê*>Ìi`Ê­iÌÀˆVÊ-iÀˆiî
AS6733
˜ÃiÀÌÃ]Ê7ˆÀiÊ/…Ài>`]Ê1˜«>Ìi`Ê­1 ®
MA3329, 3330, 3331
Insert, Screw thread, Helical Coil, Screw Locking (Metric
-iÀˆiî
AS6734
˜ÃiÀÌÃ]Ê7ˆÀiÊ/…Ài>`]Ê1˜«>Ìi`Ê­1 ®
AS8455
˜ÃiÀÌÃ]Ê7ˆÀiÊ/…Ài>`]Ê
>`“ˆÕ“Ê*>Ìi`Ê­1 ®
AS59158
Tools for inserting and extracting Helical Coil Inserts
AS8456
˜ÃiÀÌÃ]Ê7ˆÀiÊ/…Ài>`]Ê
>`“ˆÕ“Ê*>Ìi`Ê­1 ®
EMHART TEKNOLOGIES
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Heli-Coil® insert coatings & platings
Coatings/Platings
Dry Film Lubricant
Benefits
• Provides additional lubrication in high friction applications
• High temperature resistance (400°F)
• Highly recommended with Heli-Coil Screw-Locking inserts
• Mildly corrosion resistant
Material Spec: AS5272
Color: Gray
Primer-Free® II
• RoHS compliant; contains no chromates
• Eliminates need for zinc primers and epoxies
• Provides uniform top to bottom coverage
• Prevents galvanic corrosion between insert and parent material
• Eliminates locking torque issues associated with primers
• Improves installation productivity
• Provides additional lubrication facilitating insert installation
Material Spec: None
Color: Matte black
Silver Plating
• Recommended to reduce galling of threads at high temperatures
• For use up to 1200°F
• Highly recommended with inserts made from Inconel X750
Material Spec: QQ-S-365
Color: Silver white
• For Military specification purposes only
• Not recommended for new design due to its toxic nature
Cadmium Plating
Color Coding
Material Spec: QQ-P-416 Type II
Color: Iridescent yellow - Free-Running
Color: Olive drab - Screw-Locking
• Facilitates verification of insert installation
• Allows for quick identification of similar size inserts
• Available in blue, green, red, and black*
* All Heli-Coil Inch Screw-Locking inserts are supplied with a red coloring in accordance with NASM21209.
Page 8
EMHART TEKNOLOGIES • 50 Shelton Technology Center, Shelton, CT 06484 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhart.com
Heli-Coil® insert materials
Heli-Coil inserts are available in a wide choice of materials to suit specific application needs.
Contact Heli-Coil Applications Engineering to determine the correct material for your application.
304 Stainless Steel
Material Spec: AS7245
UÊ -Ì>˜`>À`]Ê}i˜iÀ>Ê«ÕÀ«œÃiÊÊÊÊÊÊÊÊÊ Ê
material
/i“«iÀ>ÌÕÀiÊÀ>˜}i\ÊÕ«Ê̜Ênääc
/i˜Ãˆi\ÊÓää]äääÊqÊÓxä]äääÊ*-
UÊ `i>ÊvœÀʜÀˆ}ˆ˜>ÊiµÕˆ«“i˜ÌÊÊÊ
Ê
applications, repair, and overhaul
Hardness: RHc 43-50
Corrosion resistance: Moderate
UÊ -̜VŽi`ʈ˜Ê“œÃÌÊÈâiÃ
>}˜ïVÊ*iÀ“i>LˆˆÌÞ\ÊӇ£äÊɜÊ
­`i«i˜`ˆ˜}ʜ˜Ê܈ÀiÊÈâi®
Inconel X750
UÊ 1Ãi`ʈ˜Ê>Ài>ÃÊiÝ«œÃi`Ê̜ʅˆ}…ÊÊ Ê
temperatures
Material Spec: AS7246
UÊ /Þ«ˆV>ÊÕÃiÃ\Ê}>ÃÊÌÕÀLˆ˜iÊi˜}ˆ˜iÃ]ÊÊ
nuclear applications, well drilling
/i˜Ãˆi\ÊÓää]äääÊ*-
Hardness: RHc 43-50
Corrosion resistance: High
>}˜ïVÊ*iÀ“i>LˆˆÌÞ\ʐ£Êɜ
UÊ
Ti“«iÀ>ÌÕÀiÊÀ>˜}i\ÊÕ«Ê̜ʣ]äääc
œ˜‡“>}˜ïV
Phosphor Bronze
Material Spec: ASTM B159-01
per UNS C51000 Grade A
UÊ `i>ÊvœÀÊÃ>ÌÊÜ>ÌiÀÊ>««ˆV>̈œ˜Ã
UÊ
/i“«iÀ>ÌÕÀiÊÀ>˜}i\ÊÕ«Ê̜ÊÓxäc
œ˜‡“>}˜ïV
UÊ ÝVii˜ÌÊiiVÌÀˆV>ÊÊÊÊÊÊÊ Ê
conductivity
/i˜Ãˆi\Ê£{ä]äääÊ*-
Ê
Hardness: HRB 95
Corrosion resistance: High
>}˜ïVÊ*iÀ“i>LˆˆÌÞ\ʐ£Êɜ
Nitronic 60®
Material Spec: UNS S21800
UÊ Superb gall resistance
/i“«iÀ>ÌÕÀiÊÀ>˜}i\ÊÕ«Ê̜Êxääc
UÊ œ“«>̈LiÊ܈̅ÊÃÌ>ˆ˜iÃÃÊÃÌiiÊÃVÀiÜÃ
UÊ `i>ÊvœÀÊÕÃiʈ˜ÊÛ>VÕՓÊi˜ÛˆÀœ˜“i˜ÌÃ
UÊ ,iµÕˆÀiÃʘœÊ>``ˆÌˆœ˜>ÊVœ>̈˜}ÃÊÊ Ê
or plating
UÊ *>À̈ViÊvÀii
UÊ œ˜‡“>}˜ïV
/i˜Ãˆi\ÊÓää]äääÊ*-
Hardness: RHc 43-50
Corrosion resistance: Moderate
>}˜ïVÊ*iÀ“i>LˆˆÌÞ\ʐ£Êɜ
Titanium
Material Spec: AMS 4957
& AMS 4958A
UÊ Superior strength-to-weight
ratio
UÊ œÀÀœÃˆœ˜ÊÀiÈÃÌ>˜Ì
UÊ ÝVii˜ÌʏœÜÊÌi“«iÀ>ÌÕÀiÊÊ
stability
/i“«iÀ>ÌÕÀiÊÀ>˜}i\ÊÕ«Ê̜ÊÈääc
/i˜Ãˆi\Ê£xä]äääÊ̜ÊÓÓä]äääÊ*-
Ê
Hardness: RHc 35-43
Corrosion resistance: High
>}˜ïVÊ*iÀ“i>LˆˆÌÞ\Ê œ˜‡“>}˜ïV
Note: Nitronic 60® is a trademark of AK Steel
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Heli-Coil® screw lock torque data
Heli-Coil Screw-Locking inserts meet
the locking torque value of Tables
I and II shown below. The values
shown conform to NASM8846 (inch
ÃiÀˆiîʜÀÊ£xÈxÊ­“iÌÀˆVÊÃiÀˆiîÊ
requirement.
IMPORTANT NOTE: When using heat-treated steel screws or stainless steel screws with
a Screw-Locking insert, an anti-seize compound MUST be applied to the screw or insert
̜ʓˆ˜ˆ“ˆâiÊ}>ˆ˜}Ê>˜`ʓ>݈“ˆâiÊVÞViʏˆvi°Ê
œ“«œÕ˜`Ãʈ˜VÕ`iÊ*Àˆ“iÀÊÀiiÊÊVœ>̈˜}Ê>˜`Ê
ÀÞʈ“ÊÕLÀˆV>˜ÌÊ­œÞL`i˜Õ“ʈÃՏw`i®Ê̜ʈ“«ÀœÛiÊ̅iÊÜi>ÀʏˆviʜvÊ̅iÊÃVÀiÜðʘʏˆiÕÊ
of coatings, Heli-Coil Gall Resistant inserts are recommended.
TABLE I. Heli-Coil Insert Locking Torque – Inch
Thread
Size
TABLE II. Heli-Coil Insert Locking Torque – Metric
Max.
Min.
Locking
Locking Torque
Torque
15th Cycle
INCH COARSE THREAD (UNC)
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£ÓÊ­°Ó£È®‡Ó{IÊ
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£‡£É{Ê­£°Óxä䮇ÇÊ
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£xʜ⇈˜
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ÎÓʜ⇈˜
{nʜ⇈˜
Çxʜ⇈˜
ÈʏL‡ˆ˜Ê
™ÊL‡ˆ˜Ê
£ÎʏL‡ˆ˜Ê
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näʏL‡ˆ˜Ê
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£xäʏL‡ˆ˜Ê
ÓääʏL‡ˆ˜Ê
ÎääʏL‡ˆ˜Ê
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nääʏL‡ˆ˜Ê
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£äääʏL‡ˆ˜Ê
££xäʏL‡ˆ˜Ê
£ÎxäʏL‡ˆ˜Ê
Max. Locking
Torque
N.m
METRIC COARSE
Thread
Size
M2x0.4
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22x2.5
M24x3
M27x3
M30x3.5
M33x3.5
M36x4
M39x4
Óʜ⇈˜
Îʜ⇈˜
Çʜ⇈˜
£äʜ⇈˜
£Îʜ⇈˜
£°äʏL‡ˆ˜
£°xʏL‡ˆ˜
Ó°äʏL‡ˆ˜
ΰäʏL‡ˆ˜
{°xʏL‡ˆ˜
Ç°xʏL‡ˆ˜
£Ó°äʏL‡ˆ˜
£È°xʏL‡ˆ˜
Ó{°äʏL‡ˆ˜
Îä°äʏL‡ˆ˜
{ä°äʏL‡ˆ˜
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nÓ°äʏL‡ˆ˜
££ä°äʏL‡ˆ˜
£ÎÇ°äʏL‡ˆ˜
£Èx°äʏL‡ˆ˜
£nx°äʏL‡ˆ˜
Ó£ä°äʏL‡ˆ˜
0.12
0.14
0.22
0.44
0.68
0.9
1.6
3
4.4
6
10
15
23
32
42
54
70
80
95
110
125
140
150
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ÎÓʜ⇈˜
{nʜ⇈˜
ÈʏL‡ˆ˜
™ÊL‡ˆ˜
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näʏL‡ˆ˜
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nääʏL‡ˆ˜
™ääʏL‡ˆ˜
£äääʏL‡ˆ˜
££xäʏL‡ˆ˜
£ÎxäʏL‡ˆ˜
0.003
0.02
0.06
0.1
0.12
0.16
0.3
0.4
0.6
0.8
1.4
2.2
3
4.2
5.5
7
9
11.0
12
14
16.0
18.0
20.0
METRIC FINE
UNIFIED FINE THREAD (UNF)
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£‡ÎÉnÊ­£°ÎÇx䮇£Ó
£‡£ÉÓÊ­£°xää䮇£Ó
Min. Locking
Torque 15th Cycle
N.m
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M18x2
M20x2
M22x2
M24x2
M27x2
M30x2
M33x2
M36x2
M39x2
M36x3
M39x3
Îʜ⇈˜
Çʜ⇈˜
£äʜ⇈˜
£°äʏL‡ˆ˜
£°xʏL‡ˆ˜
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ΰxʏL‡ˆ˜
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™°xʏL‡ˆ˜
£{°äʏL‡ˆ˜
£n°äʏL‡ˆ˜
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ÎÓ°äʏL‡ˆ˜
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™Ó°äʏL‡ˆ˜
™ä°äʏL‡ˆ˜
££Ç°äʏL‡ˆ˜
£{ΰäʏL‡ˆ˜
£Èx°äʏL‡ˆ˜
£™ä°äʏL‡ˆ˜
6
10
10
15
15
23
32
42
54
70
42
54
70
80
95
110
125
140
150
140
150
0.8
1.4
1.4
2.2
2.2
3
4.2
5.5
7
9
5.5
7
9
11.0
12
14
16.0
18.0
20.0
18.0
20.0
* These sizes are not included in NASM8846. Torque values shown are interpolated from sizes that are included. All torque data derived for stainless inserts only.
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Heli-Coil® design data
Assembly Strength
Heli-Coil offers maximum design flexibility while adhering to conservative engineering
practice allowing use of Heli-Coil inserts in virtually any application or material.
ˆÛiʏi˜}̅Ãʜvʈ˜ÃiÀÌÃÊ>ÀiÊ>Û>ˆ>Li°Ê˜Ê̅ˆÃÊ`iÈ}˜Ê“>˜Õ>]Ê̅iʏi˜}̅ÃÊ>ÀiʏˆÃÌi`Ê
as multiples of the nominal thread diameter of the screw; 1, 1-½, 2, 2-½, and 3. This
choice of insert length balances the bolt tensile strength against the shear strength
of the parent material. This allows for the design of assemblies where the bolt will
fail before the parent material. Tables III and IV below show the length of insert to be
used with different combinations of bolts and parent materials.
Shear strength of
parent material
(PSI) (Alum.,
Mag., Steel)
10.000
15,000
20,000
25,000
30,000
40,000
50,000
Shear strength of
parent material
MPa (megapascals)
(Alum., Mag., Steel)
70
100
150
200
250
300
350
Table III – Inch Bolt & Heli-Coil Insert Selection Guide
Bolt Material Minimum Ultimate Tensile Strength (PSI)
54,000
2
1-1/2
1
1
1
1
1
75,000
2-1/2
1-1/2
1-1/2
1
1
1
1
96,000
3
2
1-1/2
1-1/2
1
1
1
108,000 125,000 132,000 160,000 180,000 220,000
3
–
–
–
–
–
2-1/2
2-1/2
3
3
–
2
2
2
2-1/2
3
3
1-1/2
1-1/2
2
2
2-1/2 2-1/2
1-1/2
1-1/2
1-1/2
2
2
2-1/2
1
1
1-1/2
1-1/2
1-1/2
2
1
1
1
1
1-1/2 1-1/2
Guidelines for use of table:
1. When the parent material shear
strength falls between two listed
values, use the lower of the two
values.
Ó°ÊÊÊ*>Ài˜Ìʓ>ÌiÀˆ>ÊÅi>ÀÊÃÌÀi˜}̅ÃÊÊ
Ê ÊÊ>ÀiÊvœÀÊÀœœ“ÊÌi“«iÀ>ÌÕÀi°ÊœÀÊ
applications at elevated tempera
tures, the shear strength of the
material at that temperature must
be determined for proper selection
of bolt and insert length.
3. Be sure that the engaged thread
length of the bolt is at least as
long as the fully tapped thread
depth for the size selected
(Dimension “H”, Tables VII & VIII,
ÊÊÊÊÊÊ«°ÊÓäʇӣ®°
Table IV – Metric Bolt & Heli-Coil Insert Selection Guide
Bolt Material Minimum Ultimate Tensile Strength MPa (megapascals)
300
1.5
1
1
1
1
1
1
400
2
1.5
1
1
1
1
1
500
2.5
1.5
1.5
1
1
1
1
600
2.5
2
1.5
1
1
1
1
800
–
2.5
2
1.5
1
1
1
1000
–
3
2
1.5
1.5
1.5
1
1200
–
–
2.5
1.5
1.5
1.5
1.5
Assembly strength is a function of shear area
and the shear strength of both the bolt and
«>Ài˜Ìʓ>ÌiÀˆ>°ÊœÀÊ`iÌ>ˆi`ÊV…>ÀÌÃʜ˜ÊëiVˆwVÊ
load values, Heli-Coil Technical Bulletin 68-2
­ˆ˜V…®ÊœÀʘ}ˆ˜iiÀˆ˜}Ê-Ì>˜`>À`Ê**£xÊ­“iÌÀˆV®Ê
covers the complete range of sizes, parent
materials and bolt strengths.
1400
–
–
3
2.5
2
1.5
1.5
Corrosion Protection
Type of Conditions & Protective Methods
Parent Material
Parent Material Treatment
Extremely
Normal Severe Severe
None
1
Aluminum
Magnesium
1
1
The effect of corrosion on threaded
assemblies is dependent on many
factors — environment, types of
metals used, sealing mechanisms
and length of service. The following
recommendations apply for
minimizing the effects of corrosion
on Heli-Coil stainless steel insert
assemblies at operating temperatures
iÃÃÊ̅>˜Ênääc]ÊÕȘ}ÊV>ÀLœ˜ÊÃÌiiÊ
or alloy steel bolts.
Insert Treatment
Extremely
Normal Severe Severe
1
1
None
None
2 or 3
2 or 3
2 or 3
2 or 3
Corrosion Protection Methods
Parent material treatment
Method 1. Aluminum:ʜÀʜ݈`iÊVœ>̈˜}ÊÕÃiʏœ`ˆ˜i]ʘœ`ˆâi]ÊÀˆ`ˆÌi]Ê>À`Ê
œ>ÌʜÀÊ
iµÕˆÛ>i˜Ì°ÊÀˆ`ˆÌiÊ£{ʜÀÊ£{‡ÓÊ­‡
‡xx{£®ÊˆÃÊÀiVœ““i˜`i`ÊvœÀÊVÀˆÌˆV>Ê«>ÀÌÃÊÀ>̅iÀÊ̅>˜Ê
>˜œ`ˆâˆ˜}ÊÊ­‡-‡xääÓ®°
Method 2. Magnesium: ʜÀʜ݈`iÊVœ>̈˜}ÊÕÃiÊÀˆ`ˆÌiÊ£xʜÀÊ`ˆV…Àœ“>ÌiÊÃÕÀv>ViÊÌÀi>̓i˜ÌðʜÀÊÊw˜ˆÃ…iÃ]Ê>Ü>ÞÃÊ«Õ}ÊÌ>««i`ʅœiÃÊwÀÃÌ°
The following definitions apply…
Normal Service. Natural atmosphere
environment with the screw always
assembled in the insert.
Insert treatment
Method 1. Coat the insert with one of the following
ÀÞʈ“ÊÕLÀˆV>˜ÌÊ«iÀÊ-xÓÇÓÊÊ­‡Ê{Èä£ä®Ê­˜œÊ}À>«…ˆÌi®ÊœÀÊ܅i˜ÊÀiµÕˆÀi`ÊLÞʈÊ-«iVÊ
œ˜Þ]Ê
>`“ˆÕ“Ê«iÀÊ++‡*‡{£È]Ê/Þ«iÊ]Ê°ää䣸Ê̅ˆVŽ°
Severe Service. Mildly contaminated
atmospheric conditions involving
moisture, occasional exposure to
salty air or sea spray and the screw
may be left out of the insert for
extended periods of time.
Method 2. 1̈ˆâiÊiˆ‡
œˆÊ*Àˆ“iÀ‡ÀiiÊÊVœ>Ìi`ʈ˜ÃiÀÌÃʜÀÊÃi«>À>ÌiÊ̅iÊ«>Ài˜Ìʓ>ÌiÀˆ>Ê
vÀœ“Ê̅iʈ˜ÃiÀÌÊLÞÊÕȘ}ʏˆµÕˆ`Ê∘VÊV…Àœ“>ÌiÊ«Àˆ“iÀ]Êi`iÀ>Ê-«iVˆwV>̈œ˜Ê//‡*‡£ÇxÇ°Ê
Apply the primer to the hole sparingly and install the insert while the primer is still wet.
In addition to the above methods, further corrosion protection can be achieved by:
a. Using blind holes wherever possible.
Extremely Severe Service. Assembly
is exposed to salt water, corrosive
atmosphere and/or the screw is out
of the assembly frequently allowing
a blind hole to trap water.
L°Ê 1Ș}Ê>ÊÃi>ˆ˜}]ʈ˜ÃՏ>̈˜}ʜÀÊÃÌi«‡`œÜ˜Ê­xäxÓʏՓ°®ÊÜ>ÅiÀÊ՘`iÀÊ̅iʅi>`ʜvÊ̅iÊLœÌ°
c. Using bolts that extend completely through the length of the insert.
d. In critical applications, using a non-hardening sealer or compound on the
threaded assembly.
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Heli-Coil® insert specifications – inch
Type
Nominal
Thread
Size
“Q” Nominal Length
ScrewSize
Standard
Lock
DesignInsert No. Insert No. ation
1 Dia.
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*Inactive for new design per NASM.
1185-4CNPF375S
Complete Part No. Example: ÀiiÊ,՘˜ˆ˜}ʘÃiÀÌÆÊ£É{‡ÓäÆ
-Ì>ˆ˜iÃÃÊ-ÌiiÆÊ*Àˆ“iÀÊÀiiÊÆÊ£‡£ÉÓÊ`ˆ>°ÆÊ"˜Ê-ÌÀˆ«Ê
Type
Size
Material
Finish
Length
Packaging
1185ÊÀiiÊ,՘˜ˆ˜}]Ê
œ>ÀÃiÊ
1191ÊÀiiÊ,՘˜ˆ˜}]ʈ˜iÊ
3585 Screw-Locking, Coarse
3591Ê-VÀi܇œVŽˆ˜}]ʈ˜iÊ
-iiÊ
…>ÀÌÊ
Ê
CN – Stainless Steel
BN qÊ*…œÃ«…œÀÊÀœ˜âiÊ
TN – Inconel X
EN – Nitronic 60
GN – Titanium
PFÊqÊ*Àˆ“iÀÊÀiiÊÊ
WÊqÊÀÞʈ“ÊÕLÀˆV>˜ÌÊ
Y – Cadmium
V - Silver
Blank – None
-iiÊ
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Blank – Bulk
SÊqÊ-ÌÀˆ«Êii`
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Notes on Insert Specifications:
£° œ“ˆ˜>Êi˜}̅ʈÃÊ>ÊVœ“«ÕÌi`ÊÛ>ÕiÊ>˜`ÊV>˜˜œÌÊLiʓi>ÃÕÀi`°ÊÌʈÃÊ̅iÊ>VÌÕ>Ê>ÃÃi“Li`ʏi˜}̅ʳʣÉÓÊ«ˆÌV…°
2. The number of coils are counted 90º from the tang.
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Ê œV>̈œ˜Ê­`ˆÃÌ>˜ViÊvÀœ“Ê̅iÊÌ>˜}®ÊˆÃÊ̅iÊÃ>“iÊ>ÃÊÓÊ`ˆ>“iÌiÀʏœ˜}ʈ˜ÃiÀÌð
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Heli-Coil® insert specifications – metric
Nominal
Thread
Size
Type
Standard
Insert No.
ScrewLock
Insert No.
Size
Designation
Outside
Diameter
“Q” Nominal Length
1 Dia.
1-1/2 Dia.
M2x0.4
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22x2.5
M24x3
M27x3
M30x3.5
M33x3.5
M36x4
M39x4
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
1084
4184*
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
4184
2CN
2.2CN
2.5CN
3CN
3.5CN
4CN
5CN
6CN
7CN
8CN
10CN
12CN
14CN
16CN
18CN
20CN
22CN
24CN
27CN
30CN
33CN
36CN
39CN
2.0
2.2
2.5
3.0
3.5
4.0
5.0
6.0
7.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
27.0
30.0
33.0
36.0
39.0
3.0
3.3
3.8
4.5
5.3
6.0
7.5
9.0
10.5
12.0
15.0
18.0
21.0
24.0
27.0
30.0
33.0
36.0
40.5
45.0
49.5
54.0
58.5
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M18x2
M20x2
M22x2
M24x2
M27x2
M30x2
M33x2
M36x2
M39x2
M36x3
M39x3
4255
4255
4649
4649
3745
3745
3745
3745
3745
3745
4266
4266
4266
4266
4266
4266
4266
4266
4266
4277
4277
5255
5255
5649
5649
5145
5145
5145
5145
5145
5145
5266
5266
5266
5266
5266
5266
5266
5266
5266
5277
5277
8CN
10CN
10CN
12CN
12CN
14CN
16CN
18CN
20CN
22CN
18CN
20CN
22CN
24CN
27CN
30CN
33CN
36CN
39CN
36CN
39CN
8.0
10.0
10.0
12.0
12.0
14.0
16.0
18.0
20.0
22.0
18.0
20.0
22.0
24.0
27.0
30.0
33.0
36.0
39.0
36.0
39.0
12.0
15.0
15.0
18.0
18.0
21.0
24.0
27.0
30.0
33.0
27.0
30.0
33.0
36.0
40.5
45.0
49.5
54.0
58.5
54.0
58.5
2 Dia.
2-1/2 Dia.
3 Dia.
METRIC COARSE
4.0
5.0
6.0
4.4
5.5
6.6
5.0
6.3
7.5
6.0
7.5
9.0
7.0
8.8
10.5
8.0
10.0
12.0
10.0
12.5
15.0
12.0
15.0
18.0
14.0
17.5
21.0
16.0
20.0
24.0
20.0
25.0
30.0
24.0
30.0
36.0
28.0
35.0
42.0
32.0
40.0
48.0
36.0
45.0
54.0
40.0
50.0
60.0
44.0
55.0
66.0
48.0
60.0
72.0
54.0
67.5
81.0
60.0
75.0
90.0
66.0
82.5
99.0
72.0
90.0
108.0
78.0
97.5
117.0
METRIC FINE
16.0
20.0
24.0
20.0
25.0
30.0
20.0
25.0
30.0
24.0
30.0
36.0
24.0
30.0
36.0
28.0
35.0
42.0
32.0
40.0
48.0
36.0
45.0
54.0
40.0
50.0
60.0
44.0
55.0
66.0
36.0
45.0
54.0
40.0
50.0
60.0
44.0
55.0
66.0
48.0
60.0
72.0
54.0
67.5
81.0
60.0
75.0
90.0
66.0
82.5
99.0
72.0
90.0
108.0
78.0
97.5
117.0
72.0
90.0
108.0
78.0
97.5
117.0
Number of Coils
Nominal Length
Min.
Max.
1 Dia. 1-1/2 Dia.
2 Dia.
2-1/2 Dia.
3 Dia.
2.50
2.80
3.20
3.80
4.40
5.05
6.25
7.40
8.65
9.80
11.95
14.30
16.65
18.90
21.30
23.55
25.90
28.00
31.40
34.80
37.80
41.50
44.60
2.70
3.00
3.70
4.35
4.95
5.60
6.80
7.95
9.20
10.35
12.50
15.00
17.35
19.60
22.0
24.40
26.90
29.00
32.40
36.00
39.20
42.90
46.00
3-1/2
3-1/8
3-3/8
3-3/4
3-3/4
3-5/8
4-1/8
4
4-7/8
4-1/2
4-7/8
5
5-1/8
6-1/8
5-3/8
6-1/8
6-3/4
6-1/8
7
6-3/4
7-1/2
7-1/8
7-7/8
5-1/2
5-3/8
5-3/4
6-3/8
6-3/8
6-1/8
6-7/8
6-3/4
8
7-3/8
8
8-1/4
8-1/2
9-3/4
8-7/8
9-7/8
10-7/8
10
11-1/4
10-3/4
12
11-3/8
12-1/2
7-3/4
7-5/8
8-1/8
8-7/8
8-3/4
8-5/8
9-5/8
9-1/2
11-1/8
10-1/4
11-1/8
11-1/2
11-3/4
13-1/2
12-1/4
13-5/8
14-7/8
13-3/4
15-1/2
14-7/8
16-1/2
15-5/8
17-1/8
10-1/8
9-7/8
10-1/2
11-3/8
11-3/8
11-1/8
12-3/8
12-1/8
14-1/8
13-1/4
14-1/4
14-5/8
15
17-1/4
15-5/8
17-3/8
19
17-1/2
19-3/4
18-7/8
21
19-7/8
21-3/4
12-3/8
12-1/8
12-3/4
13-7/8
13-3/4
13-5/8
15-1/8
14-7/8
17-1/4
16-1/8
17-3/8
17-7/8
18-3/8
21
19
21-1/8
23-1/8
21-3/8
24
23
25-3/8
24-1/4
26-3/8
9.70
11.95
12.10
14.30
14.25
16.55
18.90
21.05
23.15
25.55
21.15
23.20
25.60
28.10
31.30
34.50
37.80
41.00
44.30
41.30
44.40
10.25
12.50
12.65
15.00
14.95
17.25
19.60
21.75
24.00
26.45
21.85
24.05
26.50
29.10
32.30
35.70
39.20
42.40
45.70
42.70
45.80
5-7/8
7-5/8
5-7/8
7-1/4
6
7-1/8
8-1/4
9-1/2
10-3/4
11-7/8
7
7-7/8
8-3/4
9-1/2
10-7/8
12-1/4
13-5/8
15
16-3/8
9-3/4
10-3/4
9-3/8
12
9-1/2
11-5/8
9-5/8
11-3/8
13-1/8
15
16-7/8
18-1/2
11-1/8
12-1/2
13-3/4
15
17
19-1/8
21-1/8
23-1/4
25-1/4
15-1/4
16-3/4
13
16-1/2
13-1/8
15-7/8
13-3/8
15-5/8
18
20-3/8
22-7/8
25-1/8
15-3/8
17-1/4
18-7/8
20-3/8
23-1/4
25-7/8
28-5/8
31-3/8
34-1/8
20-7/8
22-3/4
16-1/2
21
16-3/4
20-1/4
17
20
22-3/4
25-7/8
28-7/8
31-5/8
19-1/2
21-7/8
23-7/8
25-7/8
29-3/8
32-3/4
36
39-1/2
43
26-1/2
28-7/8
20-1/8
25-1/2
20-3/8
24-1/2
20-3/4
24-1/4
27-5/8
31-3/8
35
38-1/4
23-5/8
26-1/2
29
31-1/4
35-1/2
39-1/2
43-1/2
47-3/4
51-7/8
32
34-7/8
*M2 not available in Screw-Lock 1 diameter length
1084-4CNPF040S
Complete Part No. Example: ÀiiÊ,՘˜ˆ˜}ʘÃiÀÌÆÊ{ÊÝÊä°Ç
-Ì>ˆ˜iÃÃÊ-ÌiiÆÊ*Àˆ“iÀÊÀiiÊÆÊ£Ê`ˆ>°ÆÊ"˜Ê-ÌÀˆ«Ê
Type
Size
Material
Finish
Length
Packaging
1084ÊÀiiÊ,՘˜ˆ˜}]Ê
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4255, 4649, 3745, 4266 &
4277ÊÀiiÊ,՘˜ˆ˜}]ʈ˜iÊ
4184 Screw-Locking, Coarse
5255, 5649, 5145, 5266 &
5277 -VÀi܇œVŽˆ˜}]ʈ˜i
-iiÊ
…>ÀÌÊ
CN – Stainless Steel
BN qÊ*…œÃ«…œÀÊÀœ˜âiÊ
TN – Inconel X
EN – Nitronic 60
GN – Titanium
PFÊqÊ*Àˆ“iÀÊÀiiÊÊ
WÊqÊÀÞʈ“ÊÕLÀˆV>˜ÌÊÊ
Y – Cadmium
V - Silver
Blank – None
-iiÊ
…>ÀÌÊ
Ê
Blank – Bulk
SÊqÊ-ÌÀˆ«Êii`
Ê
Notes on Insert Specifications:
£°Ê œ“ˆ˜>Êi˜}̅ʈÃÊ>ÊVœ“«ÕÌi`ÊÛ>ÕiÊ>˜`ÊV>˜˜œÌÊLiʓi>ÃÕÀi`°ÊÌʈÃÊ̅iÊ>VÌÕ>Ê>ÃÃi“Li`ʏi˜}̅ʳʣÉÓÊ«ˆÌV…°
2. The number of coils are counted from the notch.
Î°Ê *…œÃ«…œÀÊÀœ˜âiʘÃiÀÌÃÊqÊNot available in sizes M2, M2.2, M2.5, M3, M3.5 and M4.
4. Inconel X Inserts – 1 diameter long Screw-Lock inserts not available in sizes M2, M2.2, M2.5 and M3.
EMHART TEKNOLOGIES
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Heli-Coil® Tangless® Inserts
Tangless Threaded Inserts provide permanent, wear
resistant screw threads that completely eliminate the
need for tang break-off and retrieval. They protect
tapped threads against failure due to stripping, corrosion
or wear. Tangless inserts are easily adjusted and easily
removed after installation.
Inserts are made from either Stainless Steel or Gall
Resistant Nitronic 60 materials and are available in 3
i˜}̅ðʈ˜ˆÃ…Êœ«Ìˆœ˜Ãʈ˜VÕ`iÊ*Àˆ“iÀÊÀiiÊ]ÊÀÞʈ“Ê
ÕLiÊ­>˜`Ê
>`“ˆÕ“Ê܅i˜ÊÀiµÕˆÀi`ÊLÞʈÊ-«iV°®
Bidirectional Design
Installs quickly and easily from either end.
Minimize Weight, Space and Cost
Requires smaller boss than solid inserts; minimize total
in-place cost.
Positive Self-Locking Torque
Heli-Coil Tangless screw-lock inserts provide a positive,
self-locking torque complying with the requirements of
NASM8846.
Stronger Assemblies
Tapped threads are strengthened because the inherent
flexibility of the insert provides a more balanced
distribution of static and dynamic loads throughout the
engagement length.
Eliminate Stress
Virtually no stress is induced into the parent material as
no staking, swaging or keying in place is required.
Tangless Tooling
Front end assembly
Pneumatic power tool
Removal tool
Hand Installation tool
Electronic tool
Note: See p.34 for more information.
Complete Part No. Example: Screw-locking Insert;
›{‡{äÆÊ-Ì>ˆ˜iÃÃÊ-ÌiiÆÊ*Àˆ“iÀÊÀiiÊ]Ê£Ê`ˆ>°]"˜Ê-ÌÀˆ«
T3585–04CPF112S
Type
T1185ÊÀiiÊ,՘˜ˆ˜}]Ê1 Ê
T1191ÊÀiiÊ,՘˜ˆ˜}]Ê1 Ê
T3585 Screw-Lock, UNC
T3591Ê-VÀi܇œVŽ]Ê1 Ê
Size
Material
Finish
-iiÊ
…>ÀÌÊ
LiœÜÊ
C - Stainless Steel
E - Nitronic 60
Ê
Ê
Length
PFʇÊ*Àˆ“iÀÊÀiiÊÊ
W ‡ÊÀÞʈ“ÊÕLiÊ
Y - Cadmium
BlankÊ‡Ê œÊˆ˜ˆÃ…
Packaging
-iiÊ
…>ÀÌÊ
LiœÜÊ
Blank - Bulk
SʇÊ-ÌÀˆ«Êii`
Nominal
Type
“A”
“B”
Thread
Free
ScrewSize
Normal Length
Free Outer Dia.
Size
Running Locking Designation 1 Dia. 1 1/2 Dia. 2 Dia. Min. Max.
A
Number of Coils
Nominal Length
1 Dia. 1 1/2 Dia. 2 Dia.
UNIFIED COARSE THREAD (UNC)
Side View
B
Top View
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UNIFIED FINE THREAD (UNF)
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Thread repair kits & master sets
Heli-Coil inserts are available in thread repair kits and sets for repairing
tapped holes which have been stripped or damaged due to wear, corrosion
and over-torque. They are available in inch, metric, spark plug and pipe thread
series. All kits have a quantity of inserts, the proper size drill, high speed steel
ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊiˆ‡
œˆÊÌ>«Ê>˜`Ê>˜Êˆ˜ÃÌ>>̈œ˜Ê̜œ°Ê/…iÊ*ÀœviÃȜ˜>Ê
Kits* (shown in boldÊÌÞ«i®Ê>ÃœÊˆ˜VÕ`iÃÊ>ÊÌ>˜}Ê
removal tool and quantities of three
lengths of inserts.
Thread
Size
Kit
P/N
Inserts
per Kit
Thread
Size
Kit
P/N
METRIC COARSE
INCH COARSE THREAD (UNC)
4-40
5-40
6-32
8-32
10-24
12-24
1/4-20
5/16-18
3/8-16
7/16-14
1/2-13
9/16-12
5/8-11
3/4-10
7/8-9
1-8
1–1/8-7
1–1/4-7
1–3/8-6
1–1/2-6
36*
36*
36*
36*
36*
36*
36*
36*
18*
18*
18*
6
6
4
6
6
5
4
4
4
5401-04
5401-05
5401-06
5401-2
5401-3
5401-1
5401-4
5401-5
5401-6
5401-7
5401-8
5401-9
5401-10
5401-12
5521-14
5521-16
5521-18
5521-20
5521-22
5521-24
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M9x1.25
M10x1.5
M11x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
36*
36*
36*
36*
36*
18*
18*
18*
6
6
4
6
6
6
5
4
4
4
5402-06
5402-2
5402-3
5402-4
5402-5
5402-6
5402-7
5402-8
5402-9
5402-10
5402-12
5528-14
5528-16
5528-161
5528-18
5528-20
5528-22
5528-24
฀฀
฀
฀
Thread
Size
Part No.
Reach
10-1.0mm
5523-10
1/2
24
12-1.25mm
5523-12
1/2
3/4
12
12
Inserts
Per Kit
6
6
6
6
6
14-1.25mm
5523-14
3/8
7/16
1/2
3/4
.472
18-1.50mm
7/8-18
5523-18
550
1/2
1/2-5/8
24
10
M14x1.25*
5408-14
Short
Normal
Long
6
6
6
* Sav-A-Thread®
( ®
Note: Do not use Heli-Coil wire inserts to repair
taper seat plug ports.
18*
18*
18*
18*
18*
6
6
6
5404-8
5404-10
5405-10
5405-12
5406-12
5406-14
5406-16
5406-18
PIPE THREAD SERIES
* The total quantity of inserts in the Professional
Kits represents 3 lengths.
Thread
Size
Part No.
Inserts
Per Kit
1/8-27
1/4-18
3/8-18
1/2-14
3/4-14
1-11-1/2
5407-2
5407-4
5407-6
5407-8
5407-12
5407-16
12
12
10
10
10
6
MASTER THREAD REPAIR SETS
* The total quantity of inserts in the Professional
Kits represents 3 lengths.
EMHART TEKNOLOGIES
36*
36*
18*
18*
18*
18*
18*
12
18*
6
18*
12
6
6
4
5403-3
5403-3.5
5403-4
5403-5
5403-6
5403-7
5403-8
5403-9
5403-10
5403-11
5403-12
5403-14
5403-16
5403-18
5403-20
SPARK PLUG SERIES
METRIC FINE
INCH FINE THREAD (UNF)
6-40
8-36
10-32
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
9/16-18
5/8-18
3/4-16
7/8-14
1-14
1-12
1–1/8-12
1–1/4-12
1–3/8-12
1–1/2-12
Inserts
per Kit
Type
Part No.
Insert sizes included in set
Inch Coarse
˜V…ʈ˜iÊ
Metric
Metric
4934
{™ÎÈÊ
4937-125
4937-150
1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 5/8-11
£ä‡ÎÓ]Ê£É{‡Ón]ÊxɣȇÓ{]ÊÎÉn‡Ó{]ÊÇɣȇÓä]Ê£ÉӇÓä
M5x0.8, M6x1, M8x1.25, M10x1.25
M5x0.8, M6x1, M8x1.25, M10x1.5
All sets contain a drill, tap, tool and inserts for each size listed above.
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Heli-Coil® assembly design
Boss Dimensions
Class of Fit
Standard boss configurations may be used with
Heli-Coil inserts.
Since Heli-Coil inserts are flexible, the class of fit of
the final assembly is a function of the tapped hole.
iˆ‡
œˆÊ-/Ê­-VÀiÜÊ/…Ài>`ʘÃiÀÌ®ÊÌ>«ÃÊ>ÀiÊ>Û>ˆ>LiÊ
in inch series for both Class 2B and 3B. Metric Classes
include 5H and 4H5H. Class 2B or 5H tapped holes
provide widest production tolerances while Class 3B
or 4H5H holes provide slightly tighter tolerances.
A boss diameter of twice the nominal bolt size is
>`iµÕ>ÌiÊvœÀʓœÃÌʏœ>`ÊVœ˜`ˆÌˆœ˜Ã°ÊœÀÊVÀˆÌˆV>Ê
applications, the boss diameter should be twice
the Heli-Coil tap major diameter (Tables VII & VIII,
«°ÊÓä‡Ó£®°ÊœÃÃÊ̅ˆVŽ˜iÃÃʈÃÊ>Êv՘V̈œ˜ÊœvÊ̅iÊÈâiÊ
and length of the insert chosen and the particular
requirements of the component being designed.
The use of Heli-Coil inserts generally minimizes
the size of the boss because their high strength
characteristics allow for smaller or fewer fasteners.
Class 3B or 4H5H holes are recommended for
Screw-Lock applications.
Bolt Projection
Standard bolts and screws that need no special hardware are used with
HC inserts. The bolt must engage the entire insert to insure maximum
assembly strength. It is strongly recommended that the tang always be
removed and bolt projection be equal to the full tapped thread depth
(Dimension H]Ê/>LiÃÊ6ÊEÊ6]Ê«°ÊÓä‡Ó£®°ÊvÊ`iÈ}˜Êˆ“ˆÌ>̈œ˜ÃÊ«Àœ…ˆLˆÌÊ
this, contact us to obtain minimum bolt projection data.
Material Thickness
The minimum material thickness for through hole assemblies is equal to the
Insert Nominal Length (Dimension Q]Ê«°£Ó‡£Î®]Ê܈̅œÕÌÊ>ÊVœÕ˜ÌiÀȘŽÊ>˜`Ê
̅iʈ˜ÃiÀÌʈ˜ÃÌ>i`Ê£É{‡£ÉÓÊ«ˆÌV…ÊLiœÜÊ̅iÊÊÃÕÀv>Vi°ÊœÀÊ«Àœ`ÕV̈œ˜]Ê̅iʅœiÊ
should be counter-sunk, and the insert installed 3/4–1-1/2 pitch below the
ÃÕÀv>Vi°Ê˜Ê̅ˆÃÊV>ÃiÊ̅iʓˆ˜ˆ“Õ“Ê“>ÌiÀˆ>Ê̅ˆVŽ˜iÃÃʈÃʺ+»Ê³Ê£Ê«ˆÌV…°Ê
Q
TOP COIL TO BE
0.75 P TO 1.5 P
BELOW SURFACE
Hole Preparation
Drawing Call Out
On right is a sectional view of an installed insert for
a Heli-Coil Insert Assembly. The example used is a
3/8-24 x .562 long Screw-Lock insert in a blind hole,
Class 3B fit, tapped with a plug tap.
H
F
2 PITCH
INCOMPLETE
THREADS
4 PITCH
INCOMPLETE
THREADS
Note: F is equivalent to the minimum drill depth; see Table V & VI on p.
18-19. H is the minimum tapping depth; see Table VII & VIII on p. 20-21.
1 PITCH TAP
END CLEARANCE
1 PITCH TAP
END CLEARANCE
TANG
REMOVED
PLUG
STYLE
TAP
BOTTOMING
STYLE
TAP
HOLE PREPARATION
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Heli-Coil® production engineering data
Engineering Data
Conventional machining methods are used for Heli-Coil assemblies.
The process is simple… 1. Drill 2. Countersink 3. Tap 4. Gage
1. Drilling
The suggested drill sizes listed for aluminum in Tables
V & VI, p. 18-19, are within the minor diameter limits
specified in NASM33537 or MA1567. Drill sizes listed for
steel, magnesium and plastic are larger (in most cases)
allowing for parent material “close-in” in soft materials
and increased tap wear life in hard materials.
The drill depths listed in this table allow for tap end
clearance, maximum insert “set-down”, countersink, and
the chamfer on the tap. These drill depths are minimum
and should be increased where possible, especially
when using Spiral Pointed Taps, to allow for chip
clearance. The formula for the drill depth is given
on p.18-19.
2. Countersinking
Countersinking the drilled hole is recommended to
prevent a feather edge at the top of the tapped hole and
to help guide the insert into the tapped threads. A 120°
included angle countersink is necessary to insure that
the angle of the tapped thread and the countersink are
the same (120° ÷ 2 = 60° tapped thread).
3. Tapping
The dimensions for the depth of the full tapped thread
(Dimension H, Tables VII & VIII, p.20-21) are MINIMUM
for blind holes with countersinks. For through holes without a countersink the minimum full tapped thread depth
must be equal to the insert nominal length (Dimension Q,
p.12-13).
Heli-Coil taps for free machining materials are listed
in Tables IX & XII, p.20 & 23 Class 2B (inch), 5H metric
and 3B (inch) or 4H5H (metric) tapped holes. (Class of
fit recommendations are given on p.14). There are four
types of taps listed:
a. Straight, Flute, Plug & Bottoming style which are
used for hand and short run production
b. Spiral Point Plug taps (chips are pushed forward)
are used for through holes and blind hole with ample
chip clearance at the bottom.
c. High Spiral Flute Bottoming taps (chips are pulled
out of the hole) are used for deep or blind holes in soft
stringy materials and holes with minimal chip clearance.
d. Roughing taps (7/16-1") are available for materials
difficult to tap to reduce the load and wear on the
finishing tap.
If it is necessary to decrease the Minimum Depth of the
drilled and tapped hole, one or more of the following
steps may be helpful:
Action
Remove the male center on plug taps
5/16, M8 & under
Use a bottoming tap
Eliminate the countersink
Reduce insert “set-down” to 1/4-1/2 pitch
Amount of Reduction
one half of the bolt
diameter
2 pitches
1/2 pitch
up to 1/2 pitch
4. Gaging
Heli-Coil thread plug gages should be used to check the
tapped holes before insert installation and according to
sampling plan. See p.24-25 for gage part numbers and
further gaging data.
Preparing Process Sheets
A sample process sheet for preparing a tapped hole for Heli-Coil inserts is shown below. Highlighted
are references to the various dimensional data and part number specifications listed in the tables on
pages listed. Insert installation and tang break off are covered in subsequent pages.
Hole preparation for 3/8-24, Screw-Lock Heli-Coil Insert, .562 long, Part No. 3591-6CN562
Blind Hole, Class 3B, tapped with a plug tap in aluminum
Oper.
No.
Operation Description
10 Drill hole .3840/.3910 diameter to minimum depth (Dimension F, Tables V & VI, p. 18-19)
Tool or Gage
25/64 drill (.3906), Tables V & VI, p. 17-19
20 Countersink 120°±5° to .42/.45 diameter (Dimension M, Tables VII & VIII, p. 19-20)
120° countersink
30 Tap 3/8 (.3750)-24 UNF-3B STI Thread Depth .600 (Dimension H, Tables VII & VIII, p. 20-21)
Heli-Coil tap 6FPB, Tables IX & XI, p. 22 & 24
40 Remove chips
Air Nozzle
50 Gage according to your sampling plan
Heli-Coil gage 3694-6, p. 26-27
60 Install 3591-6CN562 Heli-Coil insert 3/4 to 1-1/2 pitch below surface
Installation Tool 7552-6, p. 29
70 Break off tang
Heli-Coil tang break-off tool 3692-6, p. 33
EMHART TEKNOLOGIES • 50 Shelton Technology Center, Shelton, CT 06484 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhart.com
Page 17
Heli-Coil® drilling data – inch
COUNTERSUNK
120ϒ± 5ϒ
The minimum drilling depths shown below allow for the following
recommended practices:
M
1. Countersinking the drilled hole to prevent a feather edge at the
start of the tapped hole.
2. 3/4 – 1-1/2 pitch of insert “set-down” to allow for maximum
production tolerance. Dimensions are shown for both
plug and bottoming taps.
F
F
TABLE V – INCH DRILLED HOLE DIMENSIONS
Nominal
Thread
Size
“F” MINIMUM DRILLING DEPTH FOR EACH INSERT LENGTH
Plug Taps
Bottoming Taps
Suggested Drill Size
Steel, Magnesium,
Plastic
Aluminum
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Heli-Coil® drilling data – metric
For Plug Taps 5/16” or M8 and smaller. ʈÃÊiµÕ>Ê̜Ê̅iʈ˜ÃiÀÌʘœ“ˆ˜>Ê
i˜}̅ʭ+®Ê³Ê¤Ê̅iʘœ“ˆ˜>ÊLœÌÊ`ˆ>“iÌiÀʳÊxÊ*ˆÌV…Ê­>œÜˆ˜}ÊvœÀÊÌ>«Ê
V…>“viÀ]ÊVœÕ˜ÌiÀȘŽÊ>˜`ʓ>݈“ՓʺÃi̇`œÜ˜»®°
œÌi\Ê*Õ}ÊÌ>«ÃÊxɣȸʜÀÊnÊ>˜`Ê
smaller have a male center and
the drilled hole depth dimensions
allow for this length (one half of the
`ˆ>“iÌiÀʜvÊ̅iÊLœÌ®°
For Plug Taps 3/8” or M10 and larger.ÊʈÃÊiµÕ>Ê̜Ê̅iʈ˜ÃiÀÌʘœ“ˆ˜>Ê
i˜}̅ʭ+®Ê³ÊxÊ*ˆÌV…Ê­>œÜˆ˜}ÊvœÀÊÌ>«ÊV…>“viÀ]ÊVœÕ˜ÌiÀÊȘŽÊ>˜`Ê
“>݈“ՓʺÃi̇`œÜ˜»®°
>VՏ>̈œ˜ÊœvÊ`ˆ“i˜Ãˆœ˜Êº»ÊˆÃÊ
described to the left and on p. 18.
For Bottoming Taps.ÊʈÃÊiµÕ>Ê̜Ê̅iʈ˜ÃiÀÌʘœ“ˆ˜>Êi˜}̅ʭ+®Ê³ÊÎÊ*ˆÌV…Ê
­>œÜˆ˜}ÊvœÀÊÌ>«ÊV…>“viÀ]ÊVœÕ˜ÌiÀȘŽÊ>˜`ʓ>݈“ՓʺÃi̇`œÜ˜»®°
TABLE VI – METRIC DRILLED HOLE DIMENSIONS
Nominal
Thread
Size
M2X0.4
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22x2.5
M24x3
M27x3
M30x3.5
M33x3.5
M36x4
M39x4
M8x1
M10x1
M10x1.25*
M12x1.25*
M12x1.5*
M14x1.5*
M16x1.5*
M18x1.5*
M20x1.5*
M22x1.5*
M18x2
M20x2
M22x2
M24x2
M27x2
M30x2
M33x2
M36x2
M39x2
M36x3
M39x3
“F” MINIMUM DRILLING DEPTH FOR EACH INSERT LENGTH
Plug Taps
Bottoming Taps
Suggested Drill Size
Steel, Magnesium,
Plastic
Aluminum
2.1
2.3
2.55
3.15
3.7
4.2
5.2
6.25
7.25
8.3
10.5
12.5
14.5
16.5
18.75
20.75
22.75
24.75
27.75
31
34
37
40
2.1
2.35
2.65
3.2
3.7
4.25
5.3
6.3
7.3
8.4
10.5
12.5
14.5
16.5
18.75
20.75
22.75
24.75
27.75
31
34
37
40
8.25
10.25
10.25
12.25
12.25
14.25
16.25
18.25
20.25
22.25
18.5
20.5
22.5
24.5
27.5
30.5
33.5
36.5
39.5
37
40
8.3
10.25
10.25
12.25
12.5
14.5
16.5
18.5
20.5
22.5
18.5
20.5
22.5
24.5
27.5
30.5
33.5
36.5
39.5
37
40
1 Dia.
1-1/2 Dia.
5.40
6.00
6.45
7.50
8.85
10.20
12.30
15.00
16.50
19.50
19.00
22.50
26.00
28.00
33.00
35.00
37.00
42.00
45.00
51.00
54.00
60.00
63.00
18.00
16.00
17.50
19.50
21.00
23.00
25.00
27.00
29.00
31.00
30.00
32.00
34.00
36.00
39.00
42.00
45.00
48.00
51.00
54.00
57.00
3 Dia.
1 Dia.
1-1/2 Dia.
2 Dia.
6.40
7.10
7.70
9.00
10.60
12.20
14.80
18.00
20.00
23.50
24.00
28.50
33.00
36.00
42.00
45.00
48.00
54.00
58.50
66.00
70.50
78.00
82.50
METRIC COARSE
7.40
8.40
8.20
9.30
8.95
10.20
10.50
12.00
12.35
14.10
14.20
16.20
17.30
19.80
21.00
24.00
23.50
27.00
27.50
31.50
29.00
34.00
34.50
40.50
40.00
47.00
44.00
52.00
51.00
60.00
55.00
65.00
59.00
70.00
66.00
78.00
72.00
85.50
81.00
96.00
87.00
103.50
96.00
114.00
102.00
121.50
2 Dia.
2-1/2 Dia.
2-1/2 Dia.
3 Dia.
9.40
10.40
11.45
13.50
15.85
18.20
22.30
27.00
30.50
35.50
39.00
46.50
54.00
60.00
69.00
75.00
81.00
90.00
99.00
111.00
120.00
132.00
141.00
3.60
4.00
4.30
5.00
5.90
6.80
8.20
10.00
11.00
13.00
16.00
19.00
22.00
24.00
28.00
30.00
32.00
36.00
39.00
44.00
47.00
52.00
55.00
4.60
5.10
5.55
6.50
7.65
8.80
10.70
13.00
14.50
17.00
21.00
25.00
29.00
32.00
37.00
40.00
43.00
48.00
52.50
59.00
63.50
70.00
74.50
5.60
6.20
6.80
8.00
9.40
10.80
13.20
16.00
18.00
21.00
26.00
31.00
36.00
40.00
46.00
50.00
54.00
60.00
66.00
74.00
80.00
88.00
94.00
6.60
7.30
8.05
9.50
11.15
12.80
15.70
19.00
21.50
25.00
31.00
37.00
43.00
48.00
55.00
60.00
65.00
72.00
79.50
89.00
96.50
106.00
113.50
7.60
8.40
9.30
11.00
12.90
14.80
18.20
22.00
25.00
29.00
36.00
43.00
50.00
56.00
64.00
70.00
76.00
84.00
93.00
104.00
113.00
124.00
133.00
22.00
21.00
22.50
25.50
27.00
30.00
33.00
36.00
39.00
42.00
39.00
42.00
45.00
48.00
52.50
57.00
61.50
66.00
70.50
72.00
76.50
METRIC FINE
26.00
30.00
26.00
31.00
27.50
32.50
31.50
37.50
33.00
39.00
37.00
44.00
41.00
49.00
45.00
54.00
49.00
59.00
53.00
64.00
48.00
57.00
52.00
62.00
56.00
67.00
60.00
72.00
66.00
79.50
72.00
87.00
78.00
94.50
84.00
102.00
90.00
109.00
90.00
108.00
96.00
115.50
34.00
36.00
37.50
43.50
45.00
51.00
57.00
63.00
69.00
75.00
66.00
72.00
78.00
84.00
93.00
102.00
111.00
120.00
129.00
126.00
135.00
12.00
14.00
15.00
17.00
18.00
20.00
22.00
24.00
26.00
28.00
26.00
28.00
30.00
32.00
35.00
38.00
41.00
44.00
47.00
48.00
51.00
16.00
19.00
20.00
23.00
24.00
27.00
30.00
33.00
36.00
39.00
35.00
38.00
41.00
44.00
48.50
53.00
57.50
62.00
66.50
66.00
70.50
20.00
24.00
25.00
29.00
30.00
34.00
38.00
42.00
46.00
50.00
44.00
48.00
52.00
56.00
62.00
68.00
74.00
80.00
86.00
84.00
90.00
24.00
29.00
30.00
35.00
36.00
41.00
46.00
51.00
56.00
61.00
53.00
58.00
63.00
68.00
75.50
83.00
90.50
98.00
105.50
102.00
109.50
28.00
34.00
35.00
41.00
42.00
48.00
54.00
60.00
66.00
72.00
62.00
68.00
74.00
80.00
89.00
98.00
107.00
116.00
125.00
120.00
129.00
* Standard size drills are suggested even though in these sizes they vary slightly from minor diameter limits.
EMHART TEKNOLOGIES
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Heli-Coil® tapping data – inch
PLUG
STYLE
TAP
The minimum Ì>««ˆ˜}Ê`i«Ì…ÃÊŜܘÊLiœÜÊ­ˆ“i˜Ãˆœ˜Ê®Ê>ÀiÊ
the minimum for countersunk holes and an insert set-down of 1 –
1/2 pitch maximum. The calculation for Dimension “H” is:
H is equal to insert nominal length + 1 Pitch.
The tapped hole must be held within the stated pitch diameter
limits for the required class of fit for the installed Heli-Coil insert.
BOTTOMING
STYLE
TAP
H
F
D
2 PITCH
INCOMPLETE
THREADS
4 PITCH INCOMPLETE
THREADS
When anodize, Iridite or other finishes are used, all tapped hole
dimensions must be met after the finishes are applied.
1 PITCH TAP
END CLEARANCE
1 PITCH TAP
END CLEARANCE
TABLE VII – INCH TAPPED HOLE DIMENSIONS
Countersink
“M” Diameter
(120º ±5º
included angle)
Nominal
Thread
Size
฀
Min.
Max.
Min.
3B
Max.
Minor Diameter
(after tapping)
“H”MINIMUM TAPPING DEPTH
Pitch Diameter
INSERT LENGTH
2B
Max.
1D
1-1/2D
2D
1-1/2D
3D
Min.
Max.
Tap Major
Dia. Max.
Thread
Pitch "P"
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Heli-Coil® tapping data – metric
Heli-Coil taps in various types and styles produce holes
for Tolerance Classes 4H5H or 3B and 5H or 2B for use in
the general range of aluminums, magnesiums, mild steels,
free machining stainless steels and other free machining
materials. Conventional shop practice and production
procedures, speeds, feeds and lubricants should be used
in combination with proper fixturing and good tapping
machines or tapping heads. The tapped hole must
be held within the stated pitch diameter limits for the
required Tolerance Class of fit for the installed Heli-Coil
insert. For Standard (free running inserts), a tolerance
class 5H or 2B is recommended. For Screw-Locking
inserts, a tolerance class 4H5H or 3B is recommended
in order to develop higher locking torques.
TABLE VIII – METRIC TAPPED HOLE DIMENSIONS
Nominal
Thread
Size
Countersink
“M” Diameter
(120º ±5º
included angle)
Min.
Max.
Minor Diameter
(after tapping)
“H” MINIMUM TAPPING DEPTH
Pitch Diameter
Min.
Max.
Tap
Major Dia.
Max.
6.4
7.1
8.0
9.5
11.1
12.7
15.8
19.0
22.0
25.3
31.5
37.8
44.0
50.0
56.5
62.5
68.5
75.0
84.0
93.5
102.5
112.0
121.0
2.087
2.297
2.597
3.108
3.630
4.152
5.174
6.217
7.217
8.271
10.324
12.379
14.433
16.433
18.541
20.541
22.541
24.649
27.649
30.757
33.757
36.866
39.866
2.199
2.422
2.722
3.248
3.790
4.332
5.374
6.407
7.407
8.483
10.560
12.644
14.733
16.733
18.896
20.896
22.896
25.049
28.049
31.207
34.207
37.341
40.341
2.581
2.845
3.145
3.716
4.354
5.007
6.145
7.422
8.422
9.787
12.131
14.478
16.822
18.822
21.513
23.513
25.513
28.238
31.238
34.925
37.925
41.615
44.615
25.0
31.0
31.3
37.3
37.5
43.5
49.5
55.5
61.5
67.5
56.0
62.0
68.0
74.0
83.0
92.0
101.0
110.0
119.0
111.0
120.0
8.217
10.217
10.271
12.271
12.324
14.324
16.324
18.324
20.324
22.324
18.433
20.433
22.433
24.433
27.433
30.433
33.433
36.433
39.433
36.649
39.649
8.407
10.407
10.483
12.483
12.560
14.560
16.560
18.560
20.560
22.560
18.733
20.733
22.733
24.733
27.733
30.733
33.733
36.733
39.733
37.049
40.049
9.422
11.422
11.787
13.787
14.131
16.131
18.131
20.131
22.131
24.131
20.822
22.822
24.822
26.822
29.822
32.822
35.822
38.822
41.822
40.238
43.238
INSERT LENGTH
Min.
4 H Max.
5H Max.
1 Dia.
1-1/2 Dia.
4.4
4.9
5.5
6.5
7.6
8.7
10.8
13.0
15.0
17.3
21.5
25.8
30.0
34.0
38.5
42.5
46.5
51.0
57.0
63.5
69.5
76.0
82.0
5.4
6.0
6.7
8.0
9.4
10.7
13.3
16.0
18.5
21.3
26.5
31.8
37.0
42.0
47.5
52.5
57.5
63.0
70.5
78.5
86.0
94.0
101.5
17.0
21.0
21.3
25.3
25.5
29.5
33.5
37.5
41.5
45.5
38.0
42.0
46.0
50.0
56.0
62.0
68.0
74.0
80.0
75.0
81.0
21.0
26.0
26.3
31.3
31.5
36.5
41.5
46.5
51.5
56.5
47.0
52.0
57.0
62.0
69.5
77.0
84.5
92.0
99.5
93.0
100.5
M2X0.4
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22x2.5
M24x3
M27x3
M30x3.5
M33x3.5
M36x4
M39x4
2.30
2.90
3.40
4.00
4.70
5.30
6.40
7.70
8.70
10.10
12.40
14.80
17.10
19.10
21.80
23.80
25.50
28.50
31.50
35.20
38.20
41.90
44.90
2.70
2.40
2.90
3.40
4.10
4.70
5.80
7.10
8.10
9.50
11.80
14.20
16.50
18.50
21.20
23.20
25.20
27.90
30.90
34.60
37.60
41.30
44.30
2.260
2.492
2.792
3.325
3.890
4.455
5.520
6.650
7.650
8..812
10.974
13.137
15.299
17.299
19.624
21.624
23.624
25.948
28.948
32.273
35.273
38.598
41.598
2.295
2.532
2.832
3.367
3.940
4.509
5.577
6.719
7.719
8.886
11.061
13.236
15.406
17.406
19.738
21.738
23.738
26.093
29.093
32.428
35.428
38.763
41.763
2.310
2.547
2.847
3.384
3.959
4.529
5.597
6.742
7.742
8.911
11.089
13.271
15.444
17.444
19.778
21.778
23.778
26.135
29.135
32.472
35.472
38.809
41.809
METRIC COARSE
2.4
3.4
2.7
3.8
3.0
4.2
3.5
5.0
4.1
5.9
4.7
6.7
5.8
8.3
7.0
10.0
8.0
11.5
9.3
13.3
11.5
16.5
13.8
19.8
16.0
23.0
18.0
26.0
20.5
29.5
22.5
32.5
24.5
35.5
27.0
39.0
30.0
43.5
33.5
48.5
36.5
53.0
40.0
58.0
43.0
62.5
METRIC FINE
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M18x2
M20x2
M22x2
M24x2
M27x2
M30x2
M33x2
M36x2
M39x2
M36x3
M39x3
9.70
11.70
12.10
14.10
14.40
16.40
18.40
20.40
22.40
24.40
21.10
23.10
25.10
27.10
30.10
33.10
36.10
39.10
42.10
40.50
43.50
9.10
11.10
11.50
13.50
13.80
15.80
17.80
19.80
21.80
23.80
20.50
22.50
24.50
26.50
29.50
32.50
35.50
38.50
41.50
39.90
42.90
8.650
10.650
10.812
12.812
12.974
14.974
16.974
18.974
20.974
22.974
19.299
21.299
23.299
25.299
28.299
31.299
34.299
37.299
40.299
37.948
40.948
8.719
10.719
10.886
12.898
13.067
15.067
17.067
19.067
21.067
23.067
19.406
21.406
23.406
25.414
28.414
31.414
34.414
37.414
40.414
38.093
41.093
8.742
10.742
10.911
12.926
13.099
15.099
17.099
19.099
21.099
23.099
19.444
21.444
23.444
25.454
28.454
31.454
34.454
37.454
40.454
38.135
41.135
9.0
11.0
11.3
13.3
13.5
15.5
17.5
19.5
21.5
23.5
20.0
22.0
24.0
26.0
29.0
32.0
35.0
38.0
41.0
39.0
42.0
13.0
16.0
16.3
19.3
19.5
22.5
25.5
28.5
31.5
34.5
29.0
32.0
35.0
38.0
42.5
47.0
51.5
56.0
60.5
57.0
61.5
2 Dia.
2-1/2 Dia.
3 Dia.
EMHART TEKNOLOGIES • 50 Shelton Technology Center, Shelton, CT 06484 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhart.com
Page 21
Heli-Coil® STI tap part numbers – inch
STRAIGHT FLUTE TAPS. Widely used for general hand and
“>V…ˆ˜iÊÌ>««ˆ˜}ʜ«iÀ>̈œ˜Ã°ÊÛ>ˆ>Liʈ˜ÊÈâiÃÊÕ«Ê̜ʣ‡£ÉÓ¸°
SPIRAL POINTED – PLUG & SPIRAL FLUTE. Used for
efficient chip disposal in production tapping
œ«iÀ>̈œ˜Ã°ÊÛ>ˆ>Liʈ˜ÊÈâiÃÊÕ«Ê̜ʣÉÓ¸°
UÊ*Õ}Ê-ÌޏiÊqÊ­{Ê/…Ài>`Ê
…>“viÀ®° Used in thru holes and
blind holes that allow for ample chip clearance. Easier to
start and require less tapping torque than bottoming taps.
UÊ -«ˆÀ>Ê*œˆ˜Ìi` – Plug (4 Thread Chamfer). Widely
used in long thru holes and blind holes with ample
chip clearance. Incorporates an angular grind at the
point end of the tap which shears chips and drives them
forward of the tap. They are free cutting and provide
increased tap strength. Not recommended for abrasive
materials.
UÊ œÌ̜“ˆ˜}Ê-ÌޏiÊqÊ­ÓÊ/…Ài>`Ê
…>“viÀ®. Used in blind
holes drilled to a minimum depth that requires threads be
close to the bottom of the hole.
TABLE IX – HELI-COIL STI TAP PART NUMBERS
Nominal
Thread
Size
Straight Flute
Plug
Spiral Point
Plug
Bottoming
3B
2B
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Heli-Coil® STI tap dimensions – inch
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Chamfer). Have spiral flute for efficiently
pulling stringy chips out of deep or blind
holes in soft materials.
ROUGHING TAPS. Are available for difficult
tapping operations where it is desirable to
reduce the load on the finishing tap. Available
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qÊ
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£Ê
£Ê
£Ê
£Ê
ÓÊ
ÓÊ
ÓÊ
ÎÊ
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ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
£Ê
£Ê
£Ê
£Ê
£Ê
ÓÊ
ÓÊ
ÓÊ
ÓÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
ÎÊ
{Ê
{Ê
{Ê
{Ê
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ÓÊ
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Î
Î
Î
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{
{
{
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{
{
È
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NOTE: All bottoming taps have male center on thread end removed.
EMHART TEKNOLOGIES
฀฀
฀
฀
฀
฀
฀
฀
฀฀ ฀฀
฀
฀
฀ ฀฀
฀
฀
฀฀ ฀฀emhart.com฀ ฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀ ฀
Heli-Coil® STI tap part numbers – metric
STRAIGHT FLUTE TAPS. Widely used for general hand and
machine tapping operations. Available in sizes up to 39mm.
UÊ *Õ}Ê-ÌޏiÊqÊ­{Ê/…Ài>`Ê
…>“viÀ®° Used in thru holes
and in blind holes that allow for ample chip clearance.
Easier to start and require less tapping torque than
bottoming taps.
SPIRAL POINTED – PLUG & SPIRAL FLUTE. Used for
efficient chip disposal in production tapping operations.
Available in sizes up to 12mm.
UÊ -«ˆÀ>Ê*œˆ˜Ìi`ÊqÊ*Õ}Ê­{Ê/…Ài>`Ê
…>“viÀ®° Used
widely in long thru holes and blind holes with ample
chip clearance. Incorporates an angular grind at
the point end of the tap which shears chips and
drives them forward of the tap. They are free cutting
and provide increased tap strength. Not recommended
for abrasive materials.
UÊ œÌ̜“ˆ˜}Ê-ÌޏiÊqÊ­ÓÊ/…Ài>`Ê
…>“viÀ®° Used in blind
holes drilled to a minimum depth that requires threads
be close to the bottom of the hole.
TABLE XI – HELI-COIL STI TAP PART NUMBERS
Nominal
Thread
Size
฀
Straight Flute
Plug
4H5H
5H
4H5H
5H
M2X0.4
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22x2.5
M24x3
M27x3
M30x3.5
M33x3.5
M36x4
M39x4
4687-2
4687-2.2
4687-2.5
4687-3
4687-3.5
4687-4
4687-5
4687-6
4687-7
4687-8
4687-10
4687-12
4687-14
4687-16
4687-18
4687-20
4687-22
4687-24
4687-27
4687-30
4687-33
4687-36
4687-39
2087-2
2087-2.2
2087-2.5
2087-3
2087-3.5
2087-4
2087-5
2087-6
2087-7
2087-8
2087-10
2087-12
2087-14
2087-16
2087-18
2087-20
2087-22
2087-24
2087-27
2087-30
2087-33
2087-36
2087-39
4693-2
4693-2.2
4693-2.5
4693-3
4693-3.5
4693-4
4693-5
4693-6
4693-7
4693-8
4693-10
4693-12
4693-14
4693-16
4693-18
4693-20
4693-22
4693-24
4693-27
4693-30
4693-33
4693-36
4693-39
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M18x2
M20x2
M22x2
M24x2
M27x2
M30x2
M33x2
M36x2
M39x2
M36x3
M39x3
5484-8
5484-10
5444-10
5444-12
5476-12
5476-14
5476-16
5476-18
5476-20
5476-22
5490-18
5490-20
5490-22
5490-24
5490-27
5490-30
5490-33
5490-36
5490-39
5496-36
5496-39
4984-8
4984-10
4944-10
4944-12
4976-12
4976-14
4976-16
4976-18
4976-20
4976-22
4990-18
4990-20
4990-22
4990-24
4990-27
4990-30
4990-33
4990-36
4990-39
4996-36
4996-39
5486-8
5486-10
5445-10
5445-12
5477-12
5477-14
5477-16
5477-18
5477-20
5477-22
5492-18
5492-20
5492-22
5492-24
5492-27
5492-30
5492-33
5492-36
5492-39
5497-36
5497-39
฀
EMHART TEKNOLOGIES฀฀ ฀฀
Spiral Point
Plug
Bottoming
฀
฀
฀
4H5H
METRIC COARSE
2093-2
2093-2.2
2093-2.5
2093-3
2093-3.5
2093-4
2093-5
2093-6
2093-7
2093-8
2093-10
2093-12
2093-14
2093-16
2093-18
2093-20
2093-22
2093-24
2093-27
2093-30
2093-33
2093-36
2093-39
METRIC FINE
4986-8
4986-10
4945-10
4945-12
4977-12
4977-14
4977-16
4977-18
4977-20
4977-22
4992-18
4992-20
4992-22
4992-24
4992-27
4992-30
4992-33
4992-36
4992-39
4997-36
4997-39
฀
฀
฀
High Spiral Flute
Bottoming
5H
4H5H
Roughing
Tap
5H
4863-2
4863-2.2
4863-2.5
4863-3
4863-3.5
4863-4
4863-5
4863-6
4863-7
4863-8
4863-10
4863-12
4763-2
4763-2.2
4763-2.5
4763-3
4763-3.5
4763-4
4763-5
4763-6
4763-7
4763-8
4763-10
4763-12
5081-2
5081-2.2
5081-2.5
5081-3
5081-3.5
5081-4
5081-5
5081-6
5081-7
5081-8
5081-10
5081-12
4681-2
4681-2.2
4681-2.5
4681-3
4681-3.5
4681-4
4681-5
4681-6
4681-7
4681-8
4681-10
4681-12
4864-8
4864-10
4865-10
4865-12
4866-12
4764-8
4764-10
4765-10
4765-12
4766-12
5066-8
5066-10
5067-10
5067-12
5068-12
4666-8
4666-10
4667-10
4667-12
4668-12
฀฀ ฀฀
฀
฀
฀ ฀฀
฀
฀
3765-12
3765-14
3765-16
3765-18
3765-20
3765-22
3765-24
3767-12
3768-12
3768-14
3768-16
3768-18
3768-20
3768-22
3769-18
3769-20
3769-22
3769-24
฀฀ ฀฀emhart.com
Heli-Coil® STI tap dimensions* – metric
• High Spiral Flute – Bottoming
(2 Thread Chamfer). Have spiral
flute for efficiently pulling stringy
chips out of deep or blind holes in
soft materials.
ROUGHING TAPS. Are available for
difficult tapping operations where it
is desirable to reduce the load on the
finishing tap. Available in sizes 12mm
thru 24mm.
CUSTOM STI TAPS (Inch and Metric Series)
Taps made to alternate limits, configurations, or to cut difficult materials, or for
very high production are available upon
request. The following data should be
provided at the time of ordering:
• Thread size
• Finished hole class of fit. Example:
4H5H, 3B, custom pre-plate
requirements.
• Material to be cut, and its hardness.
• Hole configuration. Example: Thru or
Blind including length of drilled and
tapped hole.
• Type tap. Example: Plug or Bottoming
Straight Flute, Spiral Point, Spiral
Flute.
• Special features. Example: Length,
Shank Diameter, Chamfer Length, Tap
Material.
• Special coating of tap.
TABLE XII– HELI-COIL STI TAP DIMENSIONS
Tap Dimensions
Nominal
Thread
Size
Length
Overall
A
Length
Of Thread
B
Length
Of Square
C
Number of Flutes
Max Dia
Of Shank
D
Max
Size Of
Square
Straight
Flute
Spiral
Point
Plug
Spiral
Flute
Bott.
H Limits
Tap
Style*
3B
2B
METRIC COARSE
M2x0.4
M2.2X0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22X2.5
M24X3
M27X3
M30X3.5
M33X3.5
M36X4
M39X4
46.04
47.62
49.21
50.8
53.98
60.32
63.5
69.06
74.61
74.61
85.72
91.28
102.39
107.95
119.06
124.62
130.18
138.11
146.05
153.99
161.92
177.8
177.8
12.7
14.29
15.88
17.46
19.05
22.22
25.4
28.58
31.75
31.75
42.07
42.07
46.04
50.8
56.36
56.36
63.5
65.09
65.09
76.2
76.2
80.96
80.96
4.77
4.76
4.76
4.76
6.35
6.35
7.94
9.52
11.11
11.11
11.11
12.7
15.88
17.46
19.05
19.05
20.64
22.22
25.4
26.99
28.58
31.75
31.75
3.62
3.62
3.62
3.62
4.31
4.97
6.52
8.12
9.72
9.72
9.36
10.94
13.82
15.04
17.75
19.35
20.37
22.81
26.03
28.19
31.37
36.4
36.4
2.9
2.89
2.89
2.89
3.43
3.96
4.95
6.14
7.36
7.36
7.08
8.33
10.46
11.38
13.43
14.63
15.39
17.27
19.66
21.31
23.7
27.43
27.43
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
6
6
2
2
2
2
3
3
3
3
3
3
3
3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
2
2
2
2
3
3
3
3
3
3
3
4
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1
1
1
1
1
1
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
H1
H1
H1
H1
H1
H2
H2
H2
H2
H2
H3
H3
H3
H3
H3
H3
H3
H4
H4
H4
H4
H6
H6
H2
H2
H2
H2
H2
H3
H3
H3
H3
H3
H4
H4
H5
H5
H5
H5
H4
H6
H6
H6
H6
H8
H8
M8X1
M10X1
M10X1.25
M12X1.25
M12X1.5
M14X1.5
M16X1.5
M18X1.5
M20X1.5
M22X1.5
M18X2
M20X2
M22X2
M24X2
M27X2
M30X2
M33X2
M36X2
M39X2
M36X3
M39X3
74.61
80.71
85.72
91.28
91.28
96.84
107.95
113.51
119.06
130.18
113.51
124.62
130.18
130.18
138.11
146.05
153.99
169.86
177.8
169.86
177.8
31.75
36.51
42.07
42.07
42.07
46.04
50.8
50.8
56.36
63.5
50.8
56.36
63.5
63.5
65.09
65.09
76.2
80.96
80.96
80.96
80.96
11.11
10.32
11.11
12.7
12.7
14.29
17.46
17.46
19.05
20.64
17.46
19.05
20.64
22.22
25.4
26.99
28.58
28.58
31.75
28.58
31.75
METRIC FINE
9.72
7.36
8.24
6.25
9.36
7.08
10.94
8.33
10.94
8.33
12.23
9.29
15.04
11.38
16.61
12.57
17.75
13.43
20.37
15.39
16.61
12.57
19.35
14.63
20.37
15.39
22.81
17.27
25.98
19.66
28.19
21.31
31.37
23.7
33.23
25.07
36.4
27.43
33.23
25.07
36.4
27.43
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
6
6
6
6
3
3
3
3
3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3
3
3
4
4
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
H2
H2
H2
H3
H3
H3
H3
H3
H3
H3
H3
H3
H3
H4
H4
H4
H4
H6
H6
H6
H6
H3
H3
H3
H4
H4
H4
H4
H4
H4
H4
H5
H5
H4
H6
H6
H6
H6
H8
H8
H8
H8
* See page 23 for dimensional drawings. All bottoming taps have male center on thread end removed.
EMHART TEKNOLOGIES • 50 Shelton Technology Center, Shelton, CT 06484 • Tel. (877) EMHART-1 • Fax: (800) 225-5614 • emhart.com
Page 25
Heli-Coil® gages – inch
Accuracy of the finished thread when the insert
is installed is dependent upon the accuracy of
the tapped hole. If the finished tapped hole gages
satisfactorily, the installed insert will be within the
thread tolerance.
Nominal
Thread
Size
Gage handles and all gage nibs are marked with
the extreme product limits for the particular size
and class of fit. (See p. 20-21, Tables VII & VIII,
*ˆÌV…ʈ>“iÌiÀʈ“ˆÌî°
When gaging tapped holes which have been
thoroughly cleaned or which have a protective
finish applied, the gage should always be
lubricated with light oil.
HI nib may enter provided a definite drag results on
œÀÊLivœÀiÊÎÀ`ÊÌÕÀ˜ÊvÀœ“Êi˜ÌÀÞÊqÊ,iv°Ê‡-/‡Ón]Ê
-VÀiÜÊ̅Ài>`Ê-Ì>˜`>À`ÃÊvœÀÊi`iÀ>Ê-iÀۈVið
iˆ‡
œˆÊ-/Ê/…Ài>`Ê*Õ}Ê>}iÃÊvœÀÊV…iVŽˆ˜}Ê̅iÊ
tapped hole are listed in the table at right.
ÓÊ­°änÈ®‡È{Ê
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£‡ÎÉnÊ­£°ÎÇx䮇£ÓÊ
£‡£ÉÓÊ­£°xää䮇£ÓÊ
Working gages provide a guaranteed minimum
wear allowance on the pitch diameter of the GO
“i“LiÀÃʜvÊÌܜÊÌi˜Ê̅œÕÃ>˜`̅ÃʜvÊ>˜Êˆ˜V…Ê­°äääÓ®°Ê
These gages are recommended for production in
sizes 1/2 inch and smaller.
Reference gages have pitch diameters on or close
̜ʓˆ˜ˆ“Õ“Ê­L>ÈVÊÈâi®°Ê/…iÞÊ>ÀiÊiÃÃi˜Ìˆ>ÞÊ
laboratory or master gages and should be used
in case of conflict between two working gages.
Conflict can occur when one of the gages has
experienced more use and wear.
COMPLETE
REFERENCE GAGES
Suggested for
Longer Wear Life
Suggested as
Master Gages
3B
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£‡ÎÉnÊ­£°ÎÇx䮇ÈÊ
£‡£ÉÓÊ­£°xää䮇ÈÊ
It is not necessary to gage the installed insert.
After the insert is installed, the GO thread plug
gage may not enter freely; however, the insert
will always seat itself when the bolt or screw is
ˆ˜ÃÌ>i`Ê>˜`Ê̈}…Ìi˜i`°Ê­,iviÀi˜ViÊ -ÎÎxÎÇ®°
COMPLETE
WORKING GAGES
2B
3B
UNIFIED COARSE THREAD (UNC)
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HELI-COIL STI GAGE
WITH GO & HI MEMBERS
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Heli-Coil® gages – metric
iˆ‡
œˆÊ-/Ê/…Ài>`Ê*Õ}Ê>}iÃÊ­“iÌÀˆV®ÊvœÀÊ
checking the tapped hole are listed below.
Nominal
Thread
Size
The complete gage consists of the GO thread plug
gage, the HI thread plug gage and the appropriately
marked gage handle.
COMPLETE REFERENCE GAGE
4H5H
METRIC COARSE
M2x0.4
M2.2X0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
M14x2
M16x2
M18x2.5
M20x2.5
M22X2.5
M24X3
M27X3
M30X3.5
M33X3.5
M36X4
M39X4
Accuracy of the finished thread, when the insert
is installed, is dependent upon the accuracy of
the tapped hole. If the finished tapped hole gages
satisfactorily, the installed insert will be within the
thread tolerance. It is, therefore, not necessary to
gage the installed insert.
After the insert is installed, the GO thread plug gage
may not enter freely; however, the insert will always
seat itself when the bolt or screw is installed and
tightened. (Reference MA1567)
When gaging tapped holes which have been
thoroughly cleaned or which have a protective
finish applied, the gage should always be lubricated
with light oil.
The HI thread plug gage may enter provided that a
definite drag results on or before the second turn of
entry. (Reference ANSI B1.16)
4624-2
4624-2.2
4624-2.5
4624-3
4624-3.5
4624-4
4624-5
4624-6
4624-7
4624-8
4624-10
4624-12
4624-14
4624-16
4624-18
4624-20
4624-22
4624-24
4624-27
4624-30
4624-33
4624-36
4624-39
METRIC FINE
5416-8
5416-10
5424-10
5424-12
5480-12
5480-14
5480-16
5480-18
5480-20
5480-22
5418-18
5418-20
5418-22
5418-24
5418-27
5418-30
5418-33
5421-36
5421-39
M8X1
M10X1
M10X1.25
M12X1.25
M12X1.5
M14X1.5
M16X1.5
M18X1.5
M20X1.5
M22X1.5
M18X2
M20X2
M22X2
M24X2
M27X2
M30X2
M33X2
M36X2
M39X3
EMHART TEKNOLOGIES
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1324-2
1324-2.2
1324-2.5
1324-3
1324-3.5
1324-4
1324-5
1324-6
1324-7
1324-8
1324-10
1324-12
1324-14
1324-16
1324-18
1324-20
1324-22
1324-24
1324-27
1324-30
1324-33
1324-36
1324-39
4916-8
4916-10
4924-10
4924-12
4980-12
4980-14
4980-16
4980-18
4980-20
4980-22
4918-18
4918-20
4918-22
4918-24
4918-27
4918-30
4918-33
4921-36
4921-39
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Heli-Coil® tooling
consists of a prewinder, mandrel and 3 spacers (1 for
i>V…ʏi˜}̅ʜvʈ˜ÃiÀÌÊ̜ÊLiʈ˜ÃÌ>i`®°Ê/…iÊÛiÀÃ>̈ˆÌÞÊ
and adaptability of Heli-Coil power inserting tools is
shown on p. 32. The tool can be hand held, vertically
or horizontally mounted, and adapted to both semiautomatic and fully automatic installation stations.
Heli-Coil power inserting tools can be adapted to
assembly stations, rotary tables and transfer lines.
Tools for Tanged Inserts
Both hand and power tools are available to install
tanged inserts. The various tools to install Heli-Coil
inserts are presented on the following pages.
œÀÊ«Àœ`ÕV̈œ˜ÊÀ՘Ã]Ê«ÀœÌœÌÞ«iÊܜÀŽ]ÊÃ>Û>}i]Ê>˜`Ê
Ài«>ˆÀ]ʅ>˜`ʈ˜ÃiÀ̈˜}Ê̜œÃÊ>ÀiÊ>Û>ˆ>Li°ÊœÀʅˆ}…Ê
volume production, power inserting tools are also
available. Both types of tools are dimensioned
­«°Ó™ÊEÊΣ®Ê̜Ê>ˆ`Ê`iÌiÀ“ˆ˜>̈œ˜ÊœvÊ>VViÃÈLˆˆÌÞÊ̜Ê̅iÊ
tapped hole.
Tool Service
All Heli-Coil tooling is backed by our extensive expertise
and experience in virtually any application. All tools are
fully warranteed. In addition, our Application Engineering
Department is always available to assist in installation
techniques, special tooling (longer or shorter length
̜œÃ]ÊiÌV°®Ê>˜`Ê̜œÊÃiÀۈVi°ÊœÀÊÛiÀÞʅˆ}…Ê«Àœ`ÕV̈œ˜]Ê
Heli-Coil will provide for the successful development
of automated installation systems.
Both hand and power inserting tools feature a threaded
mandrel which engages the insert and provides a
positive lead to guide the insert into the tapped hole
easily and quickly.
*œÜiÀʈ˜ÃiÀ̈˜}Ê̜œÃÊVœ˜ÃˆÃÌʜvÊ>˜Ê>ˆÀʓœÌœÀ]Ê>`>«ÌiÀÊ
and front end assembly. The front end assembly
Hand Installation Tools
HeliCoil manufactures various designs of
hand inserting tools.
Generally, finer pitch inserts are
proportionately larger in the free state
than coarse pitch inserts and thus have
to be “pre-wound” to a smaller diameter
for installation.
TYPE I
Threaded Mandrel
Sizes 2-56 and 3-48
TYPE II
Prewinder
Large coarse pitch inserts (and 2-56,
·{nÊ>˜`ÊÓ°Óʈ˜ÃiÀÌîʘii`ʜ˜ÞÊ>Ê
threaded mandrel tool for installation.
# 4 thru 1/2" UNC
# 3 thru 1/2" UNF
TYPE III
Threaded Mandrel
9/16" thru 11/2" UNC
TYPE IV
Non-Captive Prewinder
9/16" thru 11/2" UNF
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Heli-Coil® hand installation tools
Nominal
Thread
Size
Hand Inserting Tools Tool
3 Dia. Lengths thru 7/8
2 Dia. Lengths 1” & Up Type
UNIFIED COARSE
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Nominal
Thread
Size
C
Hand Inserting Tools
Tool
3 Dia. Lengths thru M22 Type
2 Dia. Lengths M24 & Up
METRIC COARSE
6
Ê
Ê
Ê
Ê
Ê
B
A
TYPE I
Threaded Mandrel
B
C
A
TYPE II
Prewinder*
C
M2X0.4
M2.2x0.45
M2.5x0.45*
M3x0.5*
M3.5x0.6
M4x0.7
xÝä°nIÊ
ÈÝ£Ê
ÇÝ£Ê
nÝ£°ÓxÊ
£äÝ£°xÊ
£ÓÝ£°ÇxÊ
M14x2
M16x2
M18x2.5
M20x2.5
M22X2.5
M24X3
M27X3
M30X3.5
M33X3.5
M36X4
M39X4
B
6
6
6
6Ê
6
6
6
6
6
6Ê
6
M8X1
M10X1
M10X1.25
M12X1.25
M12X1.5
M14X1.5
M16X1.5
M18X1.5
M20X1.5
M22X1.5
M18X2
M20X2
M22X2
M24X2
M27X2
M30X2
M33X2
M36X2
M39X2
M36x3
M39x3
A
TYPE III
Threaded Mandrel
C
B
A
TYPE IV
Non-Captive Prewinder
7751-2
7751-2.2
7751-2.5
7751-3
7751-3.5
7751-4
ÇÇx£‡xÊ­®Ê
ÇÇx£‡ÈÊ­®Ê
ÇÇx£‡ÇÊ­®Ê
ÇÇx£‡nÊ­®Ê
ÇÇx£‡£äÊ­®Ê
ÇÇx£‡£ÓÊ­®Ê
7751-14
7751-16
7751-18
7751-20
7751-22
7751-24
7751-27
7751-30
7751-33
7751-36
7751-39
METRIC FINE
7755-8
7755-10
7756-10
7756-12
7753-12
7753-14
7753-16
7753-18
7753-20
7753-22
7754-18
7754-20
7754-22
7754-24
7754-27
7754-30
7754-33
7754-36
7754-39
7752-36
7752-39
IV
I
II
II
II
II
IV
IV
III
IV
III
IV
III
III
III
III
III
II
II
II
II
II
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
IV
* Special tools required to install Phosphor Bronze and Inconel X-750 inserts in these sizes. To order add “-9” to the part number shown.
œÌi\ÊʘÃiÀÌÃʓ>ÀŽi`Ê܈̅Ê>˜Ê¸­®¸Ê>ÀiÊ>Û>ˆ>LiÊ܈̅Ê>ÊÃÌiiÊ«Ài܈˜`iÀ°ÊÊ
œÀÊ̅ˆÃʜ«Ìˆœ˜]ÊëiVˆvÞÊ܅i˜ÊœÀ`iÀˆ˜}Ê­i°}°]ÊÇxx£‡Î®°
Hand Inserting Tool Dimensions
INCH
METRIC
A
TYPE I - Coarse & Fine
2-56
M2.2
2-7/16
3-56
–
6
2
3
5/16
5/8
TYPE II - Coarse & Fine
No. 4
M2.5
4-5/8
No. 5
M3
4-5/8
No. 6
M3.5
4-5/8
No. 8
M4
4-5/8
No. 10 M5
4-5/8
No. 12 –
4-5/8
£É{¸Ê
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{‡xÉnÊ
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3/8
3/8
3/8
3/8
15/32
33/64
ÎÎÉÈ{Ê
xÉnÊ
{xÉÈ{Ê
2-9/32
2-9/32
2-9/32
2-9/32
2-9/32
2-17/32
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METRIC
A
B
TYPE II - Coarse & Fine (continued)
ÇɣȸÊ
£äÊEÊ££Ê x‡£É{Ê ÓxÉÎÓÊ
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C
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C
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{
{
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È
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INCH
METRIC
A
TYPE IV - Coarse & Fine*
™É£È¸Ê
£{IÊ x‡ÎÉnÊ
xÉn¸Ê
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£‡£ÉÓ¸Ê
ΙÊ
LJ£ÎÉ£ÈÊ
1-64
M2
2-5/8
B
ӇÇÉnÊ
ӇÇÉnÊ
ӇÇÉnÊ
ӇÇÉnÊ
ӇÇÉnÊ
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3/4
C
£‡£Én
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7/16
* M14 & M16 Coarse are Type IV Tools. For metric
sizes not shown, see next largest size.
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Heli-Coil® power installation tools – inch
ÊÀœ˜Ìʘ`ÊÃÃi“LÞÊVœ˜ÃˆÃÌÃʜvÊ>Ê«Ài܈˜`iÀ]Ê
mandrel and spacers. Select the adapter that
corresponds with the insert size being used.
*œÜiÀÊ̜œÃÊvœÀÊÃÌÀˆ«Êvii`ʈ˜ÃiÀÌÃÊ>ÀiÊ>Û>ˆ>Liʈ˜Ê
ÈâiÃʛÓÊ­Ó°Ó®Ê̅ÀœÕ}…ÊxɣȸʭȮ°
Heli-Coil power tools are available in UNC and
iÌÀˆVÊ1 ÊÈâiÃʛÓÊ­Ó°Ó®Ê̅ÀÕÊ£ÉÓ¸IÊ­£Ó®ÊvœÀÊÀ>«ˆ`Ê
ˆ˜ÃÌ>>̈œ˜ÊœvÊiˆ‡
œˆÊˆ˜ÃiÀÌðÊ*œÜiÀÊ̜œÃÊVœ˜ÃˆÃÌʜvÊ
>ÊÀœ˜Ìʘ`ÊÃÃi“LÞ]Ê>˜Ê`>«ÌiÀÊ>˜`Ê>ÊÀiÛiÀÈLiʈÀÊ
Motor. All three components are ordered separately.
PREWINDERS
FRONT END ASSEMBLY
P/N for
Strip Feed
Inserts
SPACERS
P/N for
P/N for
Bulk
Strip Feed
Inserts
Inserts
MANDRELS
INCH COARSE THREAD (UNC)
1 Dia.
1-1/2 Dia.
2 Dia.
Ê Ê Ê qÊ
nxx£‡ä{Ê
nxx£‡äxÊ
nxx£‡äÈÊ
nxx£‡ÓÊ
nxx£‡ÎÊ
nxx£‡{Ê
nÓx£‡xÊ
nÓx£‡ÈÊ
nÓx£‡ÇÊ
nÓx£‡nÊ
nxx£‡äӇ£xÊ Ê Ê
nxx£‡ä{‡£xÊ
Ê Ê qÊ
nxx£‡äȇ£xÊ
nxx£‡Ó‡£xÊ
nxx£‡Î‡£xÊ
nxx£‡{‡£xÊ
nÓx£‡x‡£xÊ
Ê Ê qÊ
Ê Ê qÊ
Ê Ê qÊ
8553-02
Ê qÊ
nxxLJäӇ£x
8553-04
nxxLJä{Ê
nxxLJä{‡£x
8553-05
nxxLJäxÊ
Ê Ê qÊ
8553-06
nxxLJäÈÊ
nxxLJäȇ£x
8553-2
nxxLJÓÊ
nxxLJӇ£xÊ
8553-3
nxxLJÎÊ
nxxLJ·£x
8553-4
nxxLJ{Ê
nxxLJ{‡£x
8253-5
nÓxLJxÊ
nÓxLJx‡£x
8253-6
nÓxLJÈÊ
Ê Ê q
8253-7
nÓxLJÇÊ
Ê Ê q
8253-8
nÓxLJnÊ
Ê Ê q
INCH FINE THREAD (UNF)
8559-02
8559-04
8559-05
8559-06
8559-2
8559-3
8559-4
8259-5-10
8259-6-10
8259-7-10
8259-8-10
8560-02
8560-04
8560-05
8560-06
8560-2
8560-3
8560-4
8259-5-15
8259-6-15
8259-7-15
8259-8-15
ÈÊ­°£În®‡{äÊ
£äÊ­°£™ä®‡ÎÓÊ
£É{Ê­°Óxä䮇ÓnÊ
xÉ£ÈÊ­°Î£Óx®‡Ó{Ê
ÎÉnÊ­°ÎÇx䮇Ó{Ê
ÇÉ£ÈÊ­°{ÎÇx®‡ÓäÊ
£ÉÓÊ­°xää䮇ÓäÊ
nxxӇäÈÊ
nxxӇÎÊ
nxxӇ{Ê
nÓxӇxÊ
nÓxӇÈÊ
nÓxӇÇÊ
nÓxӇnÊ
Ê Ê qÊ
nxxӇ·£xÊ
nxxӇ{‡£xÊ
nÓxӇx‡£xÊ
Ê Ê qÊ
Ê Ê qÊ
Ê Ê qÊ
nxxn‡äÈÊ
nxxn‡ÎÊ
nxxn‡{Ê
nÓxn‡xÊ
nÎxn‡ÈÊ
nÓxn‡ÇÊ
nÓxn‡nÊ
8559-06
8559-3
8559-4
8259-5-10
8259-6-10
8259-7-10
8259-8-10
8560-06
8560-3
8560-4
8259-5-15
8259-6-15
8259-7-15
8259-8-15
8561
8561
8561
Small Adapter
ÓÊ­°änÈ®‡xÈÊ
{Ê­°££Ó®‡{äÊ
xÊ­°£Óx®‡{äÊ
ÈÊ­°£În®‡ÎÓÊ
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£äÊ­°£™ä®‡Ó{Ê
£É{Ê­°Óxä䮇ÓäÊ
xÉ£ÈÊ­°Î£Óx®‡£nÊ
ÎÉnÊ­°ÎÇx䮇£ÈÊ
ÇÉ£ÈÊ­°{ÎÇx®‡£{Ê
£ÉÓ­°xää䮇£ÎÊ
8561-02
8561
8561
8561
8561
8561
8561
Large Adapter
P/N for
Bulk Inserts
(2 dia. max.)
Large Adapter Small Adapter
Nominal
Thread
Size
Ê Ê qÊ
nxxn‡Î‡£x
nxxn‡{‡£x
nÓxn‡x‡£x
Ê Ê q
Ê Ê q
Ê Ê q
8554-06
8554-3
8554-4
8254-5
8254-6
8254-7
8254-8
NONE
REQ’D
NONE
REQ’D
*Tools for larger sizes or special applications are available upon request.
Pneumatic Power Tool
Complete Power Tool (Assembled)
(Parts are ordered separately)
Air Motor 8510-1
ADAPTERS
Small 8550R
(Sizes < 1/4")
Large 8550-1R
(Sizes > 1/4")
฀
FRONT END ASSEMBLY
฀
฀
฀ ฀
฀ ฀
฀Part No. 23537 ฀ ฀ ฀฀
฀
฀
฀
฀
฀ ฀
฀
฀ ฀
฀
฀ ฀
฀
฀ ฀ ฀
M2.2x0.45 & M2.5x0.45
Prewinder
฀
฀
EMHART TEKNOLOGIES฀฀ ฀฀
Mandrel
Spacers
฀
฀
฀2-56,
฀
฀
฀
฀
฀
฀฀ ฀฀
฀
฀
฀ ฀฀
฀
฀
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Heli-Coil® power installation tools – metric
*œÜiÀÊ̜œÃÊVœ˜ÃˆÃÌʜvÊ>ÊFront End Assembly, an Adapter
and a reversible Air Motor. All three components are
ordered individually. A front end assembly consists of a
prewinder, mandrel and spacers. Select an Adapter that
is compatible with the Air Motor to be used, and for the
size range up thru 6mm or the size range 7mm thru 12mm.
Heli-Coil metric power inserting tools are available in
coarse and fine sizes up to 12mm* for rapid installation
of standard and screw-lock inserts, substantially
reducing assembly costs. Strip feed power tools are
available in sizes up to 7mm. They speed up assembly,
eliminate waste and permit an accurate count.
PREWINDERS
FRONT END ASSEMBLY
Nominal
Thread
Size
P/N for
Bulk Inserts
(2 dia. max.)
P/N for
Strip Feed
Inserts
P/N for
Bulk
Inserts
SPACERS
P/N for
Strip Feed
Inserts
MANDRELS
1 Dia.
1-1/2 Dia.
2 Dia.
8777-2.2
8777
8777
8777
8777
8777
8777
Large Adapter
Large Adapter
Small Adapter
METRIC COARSE
M2.2x0.45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.5
M12x1.75
–
8751-2.5
8751-3
8751-3.5
8751-4
8751-5
8751-6
8751-7
8751-8
8751-10
8751-12
8751-2.2-15
8751-2.5-15
8751-3-15
8751-3.5-15
8751-4-15
8751-5-15
8751-6-15
8751-7-15
–
–
–
–
8769-2.5
8769-3
8769-3.5
8769-4
8769-5
8769-6
8769-7
8769-8
8769-10
8769-12
8769-2.2-15
8769-2.5-15
8769-3-15
8769-3.5-15
8769-4-15
8769-5-15
8769-6-15
8769-7-15
–
–
–
METRIC FINE
8757-2.2
8757-2.5
8757-3
8757-3.5
8757-4
8757-5
8757-6
8757-7
8757-8
8757-10
8757-12
8775-2.2
8775-2.5
8775-3
8775-3.5
8775-4
8775-5
8775-6
8777-7-10
8777-8-10
8777-10-10
8777-12-10
8776-2.2
8776-2.5
8776-3
8776-3.5
8776-4
8776-5
8776-6
8777-7-15
8777-8-15
8777-10-15
8777-12-15
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
8755-8
8755-10
8756-10
8756-12
8753-12
–
–
–
–
–
8770-8
8770-10
8758-10
8758-12
8773-12
–
–
–
–
–
8764-8
8764-10
8759-10
8759-12
8774-12
8777-8-10
8777-10-10
8777-10-10
8777-12-10
8777-12-10
8777-8-15
8777-10-15
8777-10-15
8777-12-15
8777-12-15
NONE
REQ’D
NONE
REQ'D
*Tools for larger sizes or special applications are available upon request.
œÀÊiÛ>Õ>̈˜}Êë>ViÊÀiµÕˆÀi`ÊvœÀÊ
installing Heli-Coil inserts with
standard manual, pneumatic and
electronic inserting tools and
tang break-off tools, the diagrams
on p. 29 & 31 give dimensions of
standard Heli-Coil tooling.
Pneumatic Power Tool
B
A
œÀÊëiVˆ>ÊÛ>Àˆ>̈œ˜ÃʜÀÊ
adaptations, contact our
Applications Engineers at
­ÓäήÊnÎä‡ÎÓÎx°
G
D
C
E
F
H
Pneumatic Power Tool Dimensions
SIZE
INCH
No. 2
No. 4
No. 5
No. 6
No. 8
No. 10
£É{¸Ê
xɣȸÊ
ÎÉn¸Ê
ÇɣȸÊ
£ÉÓ¸Ê
A
B
A
B
C
METRIC
FOR BULK INSERTS
FOR STRIP FEED INSERTS
M2.2
–
–
5/16
7/16
M2.5
1/4
9/16
3/8
15/16
M3
9/32
9/16
3/8
15/16
M3.5
5/16
9/16
1/2
15/16
M4
11/32
9/16
1/2
15/16
M5
3/8
29/32
1/2
15/16
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฀฀
฀
฀
฀
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฀
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D
23/32
23/32
2332
23/32
23/32
23/32
ÓÎÉÎÓÊ
£¸Ê
£¸Ê
£¸Ê
£¸Ê
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E
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
1-1/8
£‡£ÉnÊ
£‡™É£ÈÊ
£‡™É£ÈÊ
£‡™É£ÈÊ
£‡™É£ÈÊ
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1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
£‡ÎÉnÊ
£‡ÎÉnÊ
£‡ÇÉnÊ
Ӈ£É{Ê
£‡£ÉÓÊ
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3-3/16
3-3/16
3-3/16
3-3/16
3-3/16
3-3/16
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{‡ÇÉ£ÈÊ
{‡ÎÉ{Ê
x‡£ÉnÊ
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1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
£‡£É{Ê
£‡£É{Ê
£‡£É{Ê
£‡£É{Ê
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4-7/16
4-7/16
4-7/16
4-7/16
4-7/16
4-7/16
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฀฀ ฀฀emhart.com฀ ฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀ ฀
Heli-Coil® power installation tools
Electronic Power Installation Tool
Heli-Coil offers an electronic power tool where electric power is preferred
over air. The slender configuration of the mandrels allows them to reach
into constricted areas. Electric power meets the requirements of clean
room operations. Operators prefer
Electronic Tool Mandrel Assembly
electric power because it is quieter.
Insert Thread
Mandrel Assembly
The electronic tool is lighter to
Size (UNC)
(for bulk inserts)
minimize operator fatigue. Mandrel
# Ó­°änÈ®‡xÈÊ
näx£‡äÓ
assemblies are available to install
# {­°££Ó®‡{äÊ
näx£‡ä{
the sizes of Heli-Coil bulk loaded
# È­°£În®‡ÎÓÊ
näx£‡äÈ
inserts listed below.
# n­°£È{®‡ÎÓÊ
Power Supply
P/N 8050-50
ÊÊnäx£‡Ó
Mandrel
(see table)
# £ä­°£™ä®‡ÎÓÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊ£ään™‡Î
Application Note: Variations in
1/4-20
8051-4
Mandrel Assembly dimensions and
threads are available on special
Note: Only available in inch. 10-32 and 1/4-20
order basis. Please contact Heli-Coil require larger driver (P/N 8050-650C).
Applications Engineering Department
at (203) 830-3235 to discuss your application.
Mandrel Driver
P/N 8050-400C
P/N 8050-650C
Pneumatic Power Tool Installation Kit
/…ˆÃÊiˆ‡
œˆÊ«œÜiÀÊ̜œÊˆ˜ÃÌ>>̈œ˜ÊŽˆÌÊ­nxÓÓ®ÊVœ˜Ì>ˆ˜ÃÊ>˜Ê
ˆÀʜ̜ÀÊ­nx£ä‡£®]Ê>`>«ÌiÀ]Ê̜œÃ]Ê>ÊwÌiÀ‡Ài}Տ>̜À‡ÕLÀˆV>̜À]Ê
oil, two quick disconnect fittings, Power Tools
Kit
Small
and wrenches. All are packed
Kit Types
Part#
Adapter
Small Adapter Set 8522
✓
in a portable molded box with
Large Adapter Set 8521
easy-to-follow operating
Combination Set
8520
✓
ˆ˜ÃÌÀÕV̈œ˜Ã°ÊÀœ˜Ìʘ`ÊÃÃi“LˆiÃÊ
may be ordered separately to fit the sizes of Heli-Coil inserts
to be installed.
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀ ฀
Cordless Electric Tool
Power Tool Holder
The Heli-Coil Cordless Tool is a complete
ŽˆÌÊ­ÇÓää®Ê̅>Ìʈ˜VÕ`iÃÊ>Ê`ÀˆÛiÀ]ÊÓÊ
L>ÌÌiÀˆiÃÊ­ÇÓää‡Óä®]Ê£xʓˆ˜ÕÌiÊV…>À}iÀÊ
and mandrel chuck all in a durable
metal box. The cordless tool is portable,
lightweight, has adjustable torque and
uses standard Heli-Coil electronic tool
|installation mandrels
for quick setup.
/…iÊ*œÜiÀÊ/œœÊœ`iÀÊÓÎxÎÇ
is mounted on a bench and
the appropriate air motor is
attached to a movable arm.
A mounting arm is also
provided for attaching reels
of strip-feed inserts.
฀
EMHART TEKNOLOGIES฀฀ ฀฀
฀
฀
This configuration ensures
accurate vertical (square to
ܜÀŽÊÃÕÀv>Vi®Êˆ˜ÃÌ>>̈œ˜ÃʜvÊ
Heli-Coil inserts in relatively
large parts. The tool holder is
capable of installing inserts
within a radius of 26 inches
as well as on multiple planes.
฀
฀
฀
฀
฀฀ ฀฀
฀
฀
Large
Adapter
✓
✓
Note: Recommended for use with the
2-56, M2.2x0.45 and M2.5x0.45 air tools.
It also may be used with the Heli-Coil
Electronic Inserting Tool.
฀ ฀฀
฀
฀
฀฀ ฀฀emhart.com
Heli-Coil® tang removal/extraction tools
Heli-Coil
Tang Break-Off Tools
Nominal
Thread
Tool
Replacement
Part No.
Punch Part No.
Size
UNIFIED COARSE THREAD (UNC)
£Ê­°äÇή‡È{Ê
Îșx‡ä£Ê
ÎșLJä£
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ÎÊ­°ä™™®‡{nÊ
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{Ê­°££Ó®‡{äÊ
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£ÓÊ­°Ó£È®‡Ó{Ê
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Îșx‡ÇÊ
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Îșx‡nÊ
ÎÈ{·nÊ
UNIFIED FINE THREAD (UNF)
ÓÊ­°änÈ®‡È{Ê
Îșx‡äÓÊ
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ÎÊ­°ä™™®‡xÈÊ
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The driving tangs of Heli-Coil inserts
must be removed to eliminate their
interference with the end of the
assembled bolt.
Heli-Coil tang break-off tools are
available for use with inserts
through 1/2 inch and 12mm metric
nominal diameter. Their operation is
automatic, having a spring loaded,
easily triggered punch that strikes a
sharp, uniform blow against the tang
of the installed insert. The tool can
be operated with one hand.
Heli-Coil
Extracting Tools
฀
฀
Replacement
Punch Part No.
M2x0.4
M2.2x0 45
M2.5x0.45
M3x0.5
M3.5x0.6
M4x0.7
M5x0.8
M6x1
M7x1
M8x1.25
M10x1.25
M12x1.75
METRIC COARSE
4238-2
4238-2.2
4238-2.2
4238-3
4238-3
4238-4
4238-5
4238-6
4238-7
4238-8
4238-10
4238-12
3697-01
3697-02
3697-02
3697-04
3697-04
3697-2
3697-3
3697-4
4436-7
3643-5
4436-10
4436-12
M8x1
M10x1
M10x1.25
M12x1.25
M12x1.5
METRIC FINE
4238-8
4238-10
4238-10
4238-12
4238-12
3643-5
4436-10
4436-10
4436-12
4436-12
Note: Tang break-off tools will break-off
tangs thru 2 diameter lengths.
œÀÊÈâiÃʏ>À}iÀÊ̅>˜Ê£ÉӸʜÀʣӓ“]ÊÕÃiʏœ˜}Ê
nose pliers. Bend tang up and down to snap
off at notch.
Extracting Tool
Part No.
1227-01
1227-02
1227-06
£ÓÓLJÈ
£ÓÓLJ£È
£ÓÓLJÓ{
Top View Shown
Strike the head of the tool with
a light blow. Maintaining a
steady pressure of blade against
insert, turn the extracting tool
counterclockwise until the insert
is removed.
฀฀
Tool
Part No.
Nominal Thread Size
Inch
Metric
#1
M2
#2
M2.2
#3 thru #8
M2.5 thru M4
›£äÊ̅ÀÕÊÎÉn¸Ê
xÊ̅ÀÕÊ£äÊ
ÇɣȸÊ̅ÀÕÊ£¸Ê
££Ê̅ÀÕÊÓ{Ê
£‡£Én¸Ê̅ÀÕÊ£‡£ÉÓ¸Ê
ÓÇÊ̅ÀÕÊΙÊ
Occasionally Heli-Coil inserts
must be removed. Inserts can
be removed manually with
little effort. This is done by
inserting the blade of the
extracting tool into the
Heli-Coil insert so that the
V section of the blade is
toward the top end of the
insert.
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Nominal
Thread
Size
Right & wrong blade
positions of insert
extracting tool.
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Heli-Coil® Tangless® tools
Installation and Removal Tools
Tangless® inserts may be installed by
hand or power tooling with the same
mandrel assembly.
8050-400C
Front end assembly
Pneumatic power tool
UÊ /œœˆ˜}ÊṎˆâiÃÊ>ʺL>`i»Ê̅>ÌÊÊÊ
applies torque to a notch in the
end of the coil for installation.
8050-50
Electronic tool & power supply
UÊ ˜ÃÌ>>̈œ˜Ê`i«Ì…ÊV>˜ÊLiÊ>`ÕÃÌi`ÊÊ
easily for virtually any application.
Removal tool
UÊ ÀˆÛˆ˜}ÊL>`iÃÊ>ÀiÊÀi«>Vi>LiÊ
and increase the overall life of
the tool.
Crank style installation tool
Gage style installation tool
Tangless® Hand Installation Tooling
Tangless® Pneumatic Power Tooling
Nominal
Hand
Replacement Installation Removal Tool Electronic
Thread
Installation Tool
Blade Kit**
(with handles) Driver*
Size
Crank Style Gage Style(†) Crank Style Gage Style
2-56
4-40
6-32
8-32
10-24
1/4-20
10-32
1/4-28
17551-02
17551-04
17551-06
17551-2
17551-3
17551-4
17552-3
17552-4
7571-02
7571-04
7571-06
7571-2
7571-3
7571-4
7572-3
N/A
17551-02-5
17551-04-5
17551-06-5
17551-2-5
17551-3-5
17551-4-5
17552-3-5
17552-4-5
7571-02-5
7571-04-5
7571-06-5
7571-2-5
7571-3-5
7571-4-5
7572-3-5
7572-4-5
7570-02
7570-04
7570-06
7570-2
7570-3
7570-4
7570-3
7560-4
8050-400C
8050-400C
8050-400C
8050-400C
8050-650C
8050-650C
8050-650C
8050-650C
Nominal
Thread
Size
Front End
Assembly
2-56
4-40
6-32
8-32
10-24
1/4-20
10-32
1/4-28
18551-02-15
18551-04-15
18551-06-15
18551-2-15
18551-3-15
18551-4-15
18552-3-15
18552-4-15
Replacement
Mandrel
Assembly
Replacement
Blade
18551-02-30
18551-04-30
18551-06-30
18551-2-30
18551-3-30
18551-4-30
18552-3-30
18552-4-30
18551-02-2
18551-04-2
18551-06-2
18551-2-2
18551-3-2
18551-4-2
18552-3-2
18552-4-2
* An electronic driver requires a power supply, part number 8050-50.
** Includes blade, spring and pin.
(†) Gage style tools must be used with electronic tool. Handle must be removed prior to use with electronic or battery operated drivers.
Front End Assembly Dimensions
Front End Assembly
Nominal
A
Prewinder Tip Length
.32
.25
.32
.35
.38
.38
.42
.42
.32
.40
.50
.51
.51
.51
.63
.63
.09
.13
.14
.15
.19
.15
.22
.22
Installation mandrel only
Installation Tool Dimensions
B
Nominal
Thread
Size
.164
Installation mandrel w/handle assembly
A
Adjusting/removal tool (shown w/o handle)
2.25
.250
Note: Installation mandrel and adjusting/removal tool
designed for use with both handle and electronic tool.
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“A”
Overall Length
(reference)
“B”
Mandrel
Length
5.33
5.43
5.53
5.68
5.53
5.53
5.53
5.53
2.80
2.90
3.00
3.15
3.00
3.00
3.00
3.00
2-56
4-40
6-32
8-32
10-24
10-32
1/4-20
1/4-28
.562
฀
C
Body Diameter
2-56
4-40
6-32
8-32
10-24
10-32
1/4-20
1/4-28
C
.375
B
Nose Diameter
฀
฀
฀
฀฀ ฀฀
฀
฀
฀ ฀฀
฀
“C”
Spinner
Diameter
.240
.240
.360
.360
.370
.370
.370
.370
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Creating the Future is about growth, it’s about change,
and it’s about taking risks.
At Emhart we believe in seeking ways to serve our customers better.
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Emhart provides technological solutions to over 100 different industries.
Our product lines include:
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