Toolmex Workholding Catalog - 2010

Transcription

Order from Logan Actuator Co. - (815) 943-9500 - [email protected]
PRECISION SCROLL CHUCKS
Precision Scroll Chucks
3 and 4-Jaw Self-Centering Scroll Chucks
Forged Steel, High Speed
• Extremely accurate and guaranteed to maintain exceptional
accuracy for an extended period of time
• Chucks have a modern and compact design
• Use whenever high precision machining is needed
• Each scroll chuck is assembled and statically balanced
to high tolerance levels
• Interstage and final inspections ensure high quality
Chuck Body
• Drop forged of high grade steel then put through precise
machining operations
• All bearing surfaces are carefully hardened and precisely ground
American Standard
Tongue and Groove Jaws
Scroll Plate
• Drop forged of fine quality alloy steel and carefully case hardened
• Thread flanks are ground on both sides
• Each scroll is balanced
Jaws
• Made of fine alloy steel
Teeth and Guides
• Hardened and fully ground on both sides
Pinions
• Hardened and ground fine alloy steel
Bushings
• Made of fine alloy steel
• Hardened ground and the pressed into the pinion seats
Precision grinding of scroll plate and jaw teeth
allows you to:
• Eliminate the possibility of deformation as a result of
heat treatment
• Reach uniform radial gripping force on all teeth of jaws
• Increase guarantee period for high centering accuracy
• Increase the gripping force
Bison recommended chuck grease:
Part Number 7-799-025
Outstanding Accuracy and Quality
Hardened
and Ground
Surfaces
50
1. Chuck Body
2. Back Cover
3. Scroll Plate 7-887-5...
4. Pinion 7-886-5...
5. Pinion Half Ring 7-888-7...
6. Pinion Sleeve 7-888-5..
7. Hard Master Jaws 7-885-...
8. Hard Top Jaws 7-883-...
9. Grease Nipple
10. Back Cover Mounting Bolts
11. Chuck Mounting Bolts 7-897-...
12. Back Cover Locating Pin
13. Mounting Bolts
14. Chuck Wrench 7-889-0...
15 and 16. Jaw mounting bolts 7-897-5..
Spare Parts: page 66
Backplates: pages 56-60
Toolmex Customer Service 508-653-8897 • 800-992-4766 • www.toolmex.com
3 and 4-Jaw Self-Centering Scroll Chucks
Forged Steel Body Plain Back Chucks, Backplates Required
3 Pinion Design
BISON 3-Jaw Scroll Chucks
with Two-Piece Hard Reversible Jaws
Front View
Type 3505
Each chuck is provided with:
• 1 Set of hard master jaws
• 1 Set of hard top reversible jaws
• 1 Chuck wrench
• 1 Set of mounting bolts
• 2 Hex keys
• Eye bolts for chuck sizes
15-3/4" diameter and larger
Chuck
Dia
Part
Number
Hole
Dia
RPM
max
Wt
lbs
5"
7-820-0500
1.3976
4800
11
6-1/4"
7-820-0600
1.6535
4500
22
8"
7-820-0800
2.1654
4000
39
10"
7-820-1000
2.9921
3500
55
12-1/2"
7-820-1200
4.0551
2800
110
15-3/4"
7-820-1600
5.3543
2000
187
20"
7-820-2000
7.480
1200
320
25"
7-820-2500
9.921
1000
551
32"
7-820-3200
10.50
450
886
Back View
Front View of 20" and 25" Chucks
See page 53 for
T-slot Dimensions
3-Jaw Self-Centering Chucks
• Steel Body
• Less friction between jaw and guide
• Greater Clamping Force
• Less wear due to direct pressure
Part
Number
Chuck Dia A
Max
Max
Gripping
Torque
Speed
Force
on Key
lbf
Wt
Max
Min
Clamping Clamping
lbs
B
C
D
E
max
F
G
H
L
P
mm
in
RPM
lbt*ft
3-820-2800
700
28
873
516.3 26302.6 738.5 27.5591
3.3465
5.7087 25.9843 24.8031 8.8583 3.2283 8.5827 6xM20 2.3622
3-820-3600
900
36
679
516.3 28101.1 1245.6 35.4331
5.9055
6.4961 33.4646 31.8898 14.7638 3.2283 8.5827 6xM22 2.3622 0.3150
3-820-4000 1000
40
611
516.3 28101.1 1589.5 39.3701
7.8740
6.4961 37.4016 35.8268 15.3543 3.2283 11.6535 6xM24 2.3622 0.3937
3-820-4800 1200
48
509
516.3 28101.1 2645.5 47.2441
9.4488
7.2835 37.4016 35.8268 15.3543 3.1496 16.9291 6xM24 2.9528 0.3937
3-820-6300 1600
63
382
516.3 28101.1 6172.8 62.9921
9.4488
7.2835 37.4016 35.8268 15.3543 3.1496 16.9291 6xM24 2.9528 0.3937
Quality Products • Partnership • Industry Experts
inches
0.315
51
BISON 3-Jaw Scroll Chucks with Two Sets of Hard Solid Jaws
Type 3504
• 1 Set of hard solid ID jaws
• 1 Set of hard solid OD jaws
• 1 Chuck wrench
• 1 Hex key
• Eye bolts for chuck sizes
15-3/4" diameter and larger
Chuck
Dia
Part
Number
Hole
Dia
RPM
max
Wt
lbs
4"
5"
7-829-0400
.7874
5200
6.17
7-829-0500
1.3976
4800
11
6-1/4"
7-829-0600
1.6535
4500
22
8"
7-829-0800
2.1654
4000
39
10"
7-829-1000
2.9921
3500
55
12-1/2"
7-829-1200
4.0551
2800
110
BISON 4-Jaw Scroll Chucks with Two-Piece Hard Reversible Jaws
Type 3705
• 1 Chuck wrench
• 2 Hex keys
• Eye bolts for chuck sizes 15-3/4"
diameter and larger
Chuck
Dia
Part
Number
Hole
Dia
RPM
max
Wt
lbs
6-1/4"
7-841-0600
1.6535
4500
22
8"
7-841-0800
2.1654
4000
39
10"
7-841-1000
2.9921
3500
55
12-1/2"
7-841-1200
4.0551
2800
110
15-3/4"
7-841-1600
5.3543
2000
187
20"
7-841-2000
7.480
1200
320
25"
7-841-2500
9.921
1000
551
4-Jaw Self-Centering Chucks with
Two-Piece Hard Reversible Jaws
• Steel Body
• Less friction between jaw and guide
• Greater Clamping Force
• Less wear due to direct pressure
Part
Number
52
Chuck Chuck
Max
Max Torque Gripping
Dia
Dia
Speed on Key Force
A
A
Max
Min
Clamping Clamping
B
C
D
E
max
mm
in
RPM
lbf
lbs
3-841-2800
700
28
873
26302.6
751.8
27.5591
3.3465
5.7087 25.9843 24.8031 8.8583
3-841-3200
800
32
764
27651.5
914.9
31.4961
4.9213
6.1024 29.9213 28.7402 10.5512
3-841-3600
900
36
679
1256.6
35.4331
5.9055
33.4646 31.8898 14.7638
3-841-4000
1000
40
611
1609.3
39.3701
7.8740
3-841-4800
1200
48
509
2711.6
47.2441
3-841-6300
1600
48
382
6327.2
62.9921
lbt*ft
Wt
516.3
28101.1
F
G
H
L
P
inches
9.4488
6.4961
7.2835
37.4016
7.4803 41.3386
3.2283
8.5827
6xM22
11.6535
35.8268 15.3543
6xM20
3.1496 16.9291
2.3622
6xM24
6xM30
2.9528
0.3150
0.3937
BISON 3 and 4-Jaw Self-Centering Scroll Chucks
Principal Dimensions – Back Mounting
L
Backplate Mounting Bolts
Chuck
Dia
D
F
E
d
C
H
4"
3.2677
2.7559
0.7874
.1181
1.969
-
5"
4.2520
3.7402
1.3976
2.422
1.575
6-1/4"
5.5118
4.9213
1.6535
2.756
1.693
8"
6.9291
6.2992
2.1654
3.150
1.772
.1575
h
Part
Number
Thread
M
7-897-105
M8 x 1.25
No. of
Bolts
3
0.98
7-897-108
M10 x 1.5
M12 x 1.75
10"
8.8189
7.8740
2.9921
3.543
2.087
7-897-110
12-1/2"
11.2598
10.2362
4.0551
3.937
2.244
7-897-112
15-3/4"
14.2519
12.9921
5.3543
4.331
2.639
20"
18.0314
16.5354
7.4803
4.685
3.150
25"
23.0709
21.4567
9.9212
.2756
5.079
3.425
32"
14.5000
17.7165
12.5984
.7874
6.2598
2.7559
.1969
L
7-897-125
7-897-584
1.18
6
M16 x 2
1-8
1.57
6.00
See page 25 for clamping ranges
BISON 3-Jaw Chuck T-slot Dimensions
for 20" and 25" Diameter Chucks Only
T-slot Dimensions
Chuck
Dia
20"
A
B
C
.9055"
.5512"
.2362"
.8268"
T-slot
Length
4.51"
25"
1.1811"
.7087"
.4724"
1.0236"
5.08"
E
53
PRECISION SCROLL CHUCKS DIRECT MOUNT
BISON 3-Jaw, Type A1/A2, Direct Mount Self-Centering Scroll Chucks
with Two Piece Hard Reversible Jaws
• Forged steel body
• High speed
• Type A1 spindle has a 2 bolt hole pattern,
inside (size B1), and outside the taper (size B).
Either an A1 or A2 chuck will fit
• Type A2 spindle has 1 bolt pattern, outside the taper
(size B) Only an A2 chuck will fit
Type A2
Type A1
Type A
L
Type 3515
Hole
Diameter RPM
max
d
Chuck
Dia
Part
Number
Taper
Size
6-1/4"
7-821-0615
A1-5
1.6535
7-821-0815
A1-5
1.6535
7-821-0816
A1-6
2.1653
7-821-1016
A1-6
2.1653
7-821-1018
A1-8
2.9921
7-821-1226
A2-6
4.0551
7-821-1228
A1-8
3.1496
7-821-1628
A2-8
5.3543
7-821-1629
A1-11
5.1181
7-821-2028
A2-8
5.3543
7-821-2029
A2-11
7.4803
7-821-2529
A2-11
7.4803
7-821-2530
A2-15
9.9213
8"
10"
12-1/2"
15-3/4"
20"
25"
4500
Mounting Bolts M
Wt
lbs
B
(A2)
B1
(A1)
22
–
2.4374
–
2.4374
–
3.2500
4.1880
.625
–
3.2500
4.1880
.625
–
4.3750
5.5007
.688
5.2520
–
4.1880
.630
–
4.3750
5.5007
.688
4000
42
3500
71
2800
121
2000
203
1200
353
1000
628
G
C/C1*
H
h
3.2505
.563
2.6772
1.693
3.2505
.563
6.7480
–
5.5007
.709
–
6.5000
7.7507
.750
6.7480
–
5.5007
.709
9.2520
–
7.7507
.787
9.2520
–
7.7507
.750
13.000
–
11.251
.813
3.0709
1.772
3.5039
2.087
3.7874
2.244
4.2520
2.639
4.6850
3.091
5.0787
3.425
Part
Number
7-897-520
Thread
L
7/16-14
2-3/8
7-897-521
7/16-14
7-897-532
1/2-13
7-897-533
1/2-13
3-1/8
7-897-542
5/8-11
2-3/4
7-897-535
1/2-13
4
7-897-543
5/8-11
3-1/8
7-897-550
5/8-11
7-897-563
3/4-10
7-897-551
5/8-11
7-897-568
3/4-10
7-897-566
3/4-10
5-5/16
7-897-571
7/8-9
5-1/8
2-3/4
4-1/2
Qty
3
6
4-3/4
*C=C1, depth of counterbore
54
• Forged steel body
• High speed
• No machining required
Type D
Type 3545
Chuck
Dia
D
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
Part
Number
Taper
Size
7-823-0633
D1-3
7-823-0634
D1-4
7-823-0635
D1-5
7-823-0835
D1-5
7-823-0836
D1-6
7-823-1036
D1-6
7-823-1038
D1-8
Hole
Dia
d
1.6535
RPM
max
4500
Wt
lbs
20
2.1653
4000
42
2.9921
3500
71
7-823-1236
D1-6
7-823-1238
D1-8
7-823-1239
D1-11
7-823-1638
D1-8
7-823-1639
D1-11
7-823-2038
D1-8
5.3543
7-823-2039
D1-11
7.5984
4.0551
5.3543
7-823-2538
D1-8
5.3543
7-823-2539
D1-11
7.4803
2800
2000
112
223
1200
331
1000
604
Camlock Studs
B
G
2.7795
2.1250
3.2520
2.5005
4.1260
3.7505
.5629
4.1260
3.2505
.5629
5.2520
4.1880
.6299
5.2520
4.1880
.6299
6.7480
5.5007
C
.5118
.7087
5.2520
4.1880
.6299
6.7480
5.5007
.7087
9.2520
7.7507
.7874
6.7480
5.5007
.7087
9.2520
7.7507
.7874
6.7480
5.5007
.7087
9.2520
7.7507
.7874
6.7480
5.5007
.7087
9.2520
7.7507
.7874
H
h
2.6772
1.693
3.0719
1.772
3.5039
2.087
3.7874
2.244
OD
Thread Qty
7-899-103
9/16
M10x1
7-899-104
7-899-105
5/8
3/4
M10x1
M12x1
7-899-105
7-899-106
3/4
7/8
M12x1
M16x1.5
7-899-106
7/8
M16x1.5
7-899-108
1
M21.5
7-899-106
7/8
M16x1.5
1
M20x1.5
7-899-108
7-899-111
4.3976
4.2570
Part Number
2.639
4.6850
3.150
5.0787
3.425
7-899-108
7-899-111
7-899-108
7-899-111
7-899-108
7-899-111
1-3/16 M22x1.5
1
M20x1.5
Camlock
Set Screw
Part Number
3
7-899-305
PRECISION SCROLL CHUCKS DIRECT MOUNT
BISON 3-Jaw, Type D, Direct Mount Self-Centering Scroll Chucks
6
7-899-310
1-3/16 M22x1.5
1
M20x1.5
1-3/16 M22x1.5
1
M20x1.5
1-3/16 M22x1.5
55
PRECISION BACKPLATES
BISON Rough-Finished Threaded Backplates for Threaded Spindles
Type 8206
Chuck
Dia
4"
5"
6-1/4"
8"
10"
12-1/2"
Part
Number
Thread
M
7-871-041
1-10
7-871-042
1-1/2-8
A
1.535
7-871-051
1-10
7-871-052
1-1/2-8
7-871-062
1-1/2-8
1.535
7-871-063
2-1/4-8
1.791
7-871-082
1-1/2-8
1.535
7-871-083
2-1/4-8
1.791
7-871-103
2-1/4-8
1.791
7-871-104
2-3/8-6
2.047
7-871-124
2-3/8-6
7-871-125
2-3/4-8
1.535
B
C
2.165
1.01500
2.677
1.51421
2.165
1.01500
2.677
1.51421
1.51421
3.189
2.26000
1.51421
3.583
2.26000
2.26000
4.173
2.047
2.38500
2.38500
4.331
2.76000
D
h
E
Wt
lbs
4.095
.709
.5000
8
5.079
.709
.5000
10
6.535
.787
8.110
.866
10.079
.984
12.638
1.102
.5000
.6260
12
.5000
12
.6260
13
.6260
22
.7480
25
.7480
33
NOTE: Rough Finished Backplates, see page 61 for mounting instructions
Rough-Finished Threaded Backplates for Threaded Spindles
Chuck
Dia
Part
Number
Thread
M
A
B
C
D
h
E
Wt
lbs
5
3-871-052
1-1/2"-8
1.535
2.677
1.514
5.079
0.709
0.5
9.9
3-871-062
1-1/2"-8
1.535
3-871-063
2-1/4"-8
1.791
3-871-083
2-1/4"-8
1.791
6¼
8
56
3.189
3.583
1.514
2.26
2.26
6.535
0.787
8.11
0.866
0.5
0.626
0.626
11.9
13
BISON Fully-Machined Threaded Backplates for Threaded Spindles
Type 8204
Chuck
Dia
5"
6-1/4"
Part
Number
Thread
D
7-922-051
M39 x 4
7-922-053
2-3/16 - 10
7-922-063
2-3/16 - 10
A
4.92
6.3
C
B
B1
3.00
2.00
.75
3.11
1.61
.689
3.11
1.61
.768
E
.6260
Wt
lbs
11
13
NOTE: Part number series 7-922- backplates require some machining on the counterbore
projection, see page 61 for more information
Fully-Machined Type D1 Backplates for Plain Back Chucks
Chuck
Dia
5
6¼
8
10
12½
Part
Number
Taper
Size
Stud
Dia
No. of Studs
Hole Dia
C
D
G
A
B
B1
3-878-054
D1-4
5/8
3
2.40
3.25
2.50
4.92
1.02
0.87
5.3
3-878-056
D1-6
7/8
6
3.13
5.25
4.19
7.09
1.61
1.43
11.5
3-878-064
D1-4
5/8
3
2.40
3.25
2.50
6.30
1.06
0.71
9.5
3-878-084
D1-4
5/8
3
2.40
3.25
2.50
1.06
0.71
15.4
3-878-086
D1-6
7/8
6
4.06
5.25
4.19
1.44
1.26
15.4
3-878-106
D1-6
7/8
4.06
5.25
4.19
1.44
0.87
24.3
3-878-108
D1-8
1
5.35
6.75
5.50
1.54
1.36
39.7
3-878-126
D1-6
7/8
4.06
5.25
4.19
3-878-128
D1-8
1
5.35
6.75
5.50
0.94
39.7
6
6
7.87
9.84
12.40
1.56
1.65
Wt
lbs
57
BISON Semi-Machined and Fully Machined Type D1 Backplates
• The number of camlock studs needed varies depending on the spindle size; please refer to the table below
• Plain back chucks require backplates which may require machining to fit
• Designed for direct mounting on camlock spindle nose
Semi-Machined D1 Backplates
Fully Machined D1 Backplates
Type 8240
Type 8242
Fully Machined***
Chuck
Dia
Taper
Size
4"
5"
Semi-Machined**
Stud
Dia
No.
of
Studs
Hole
Dia
C
B1
Wt
lbs
Part
Number
Dia
A
Flange
Thickness
B
Wt
lbs
1.12
.87
3.65
–
–
–
–
5/8
2.40
3.25
2.50
1.02
.57
.87
5.3
–
–
–
–
–
–
–
–
9/16
5/8
2.02
2.40
2.78
3.25
2.13
2.50
1.06
1.06
.71
.71
7-878-0630
7-878-0640
6.38
1.02
1.14
9.3
9/16
5/8
2.02
2.40
2.78
3.25
2.13
2.50
1.18
1.0
3.13
4.13
3.25
7-878-066
1.44
1.32
–
–
–
–
7/8
4.06
5.25
4.19
D1-8
7-878-068*
1.69
1.53
–
–
–
–
1
4.16
6.75
5.50
D1-3
D1-4
7-878-083
7-878-084
1.06
1.06
.71
.71
–
7-878-0840
9/16
5/8
2.02
2.40
2.78
3.25
2.13
2.50
D1-5
7-878-085
1.18
.71
D1-6
7-878-086
1.44
1.26
D1-5
D1-6
7-878-105
7-878-106
1.18
1.44
.87
.87
24.3
24.3
7-878-1050
7-878-1060
D1-8
7-878-108
1.54
1.36
39.7
7-878-1080
D1-6
D1-8
7-878-126
7-878-128
1.56
1.65
.94
.94
39.7
7-878-1260
7-878-1280
D1-11
7-878-129
1.85
1.36
7-878-1290
2.17
1-3/16
D1-6
D1-8
7-878-166
7-878-168
1.44
1.54
1.10
7-878-1660
7-878-1680
2.17
2.76
7/8
1
D1-11
7-878-169
1.85
7-878-1690
1.96
20"
D1-8
D1-11
7-878-208
7-878-209
19.70
1.54
1.85
1.14
132
7-878-2080
7-878-2090
19.88
1.81
2.83
25”
D1-11
D1-15
7-878-259
7-878-265*
24.82
1.85
1.97
1.14
232
7-878-2590
–
25.00
–
2.83
–
6-1/4"
8"
10"
12-1/2"
15-3/4"
Part
Number
Dia
A
B
D1-4
7-878-044
3.97
D1-3
D1-4
7-878-053
7-878-054
D1-3
D1-4
7-878-063
7-878-064
D1-5
7-878-065
D1-6
4.94
6.32
7.89
9.86
12.42
15.77
9.5
15.4
7-878-0650
1.14
8.00
7-878-0850
27
3/4
3.13
4.13
3.25
7/8
4.06
5.25
4.19
9.96
1.93
35
3/4
7/8
3.13
4.06
4.13
5.25
3.25
4.19
1
5.35
6.75
5.50
12.52
2.76
2.17
49
7/8
1
4.06
5.35
5.25
6.75
4.19
5.50
7.59
9.25
7.75
4.06
5.35
5.25
6.75
4.19
5.50
1-3/16
7.59
9.25
7.75
159
1
1-3/16
5.35
7.59
6.75
9.25
5.50
7.75
232
–
1-3/16
1-3/8
7.59
11.00
9.25
13.0
7.75
11.25
15.94
1.97
3
G
1.38
7-878-0860
79
1.73
1.73
3/4
D
93
6
** See mounting instructions on page 61
*** The projection on the backplate must be sized to fit each chuck
58
BISON Semi-Machined and Fully-Machined Type A1/A2 Backplates
• For plain back chucks
• Designed for direct mounting on A1 and A2 spindle nose
• May be used for both scroll and independent chucks
• Provided with spindle mounting bolts
• See mounting instructions on page 61
Fully Machined
Type 8210
Semi-Machined
Type 8212
Type 8210
Chuck Dia
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
36" 40" 49"
Type 8212
Taper
Size
Fully Machined
Part Number ***
Wt
lbs
Semi Machined
Part Number **
A-6
7-873-0560*
5.3
7-873-056
A-8
–
–
7-873-058
A-5
–
–
7-873-065
Wt
lbs
A
6.5
5
6.5
6.4
A-5
7-873-0850*
18
7-873-085
19
A-6
–
–
7-873-086
15.5
A-6
–
–
7-873-106
38
A-8
–
–
7-873-108
33
A-6
–
–
7-873-126
45
A-8
–
–
7-873-128
62
A-8
–
–
7-873-168
85
A-11
7-873-169H
51
7-873-169
141
A-11
–
–
7-873-209*
133
A2-15
7-873-2095
71
–
–
A-11
–
–
7-873-259*
158
A-15
7-873-2600
154
7-873-2595
218
A-20
–
–
7-873-2598*
156
A2-15
–
–
7-873-3615*
242
A2-20
–
–
7-873-3620*
249
7.99
9.96
12.52
15.94
19.88
B
Thru Hole
C
D
E
1.02
2.13
5.25
4.19
1.81
3.15
6.75
5.5
1
3.13
4.125
3.25
4.125
3.25
5.25
4.19
5.25
4.19
1.5
1.3
1.3
1.97
1.3
1.77
1.7
2.95
1.77
1.77
25
21.85
2.205
2.78
3.15
2.17
3.17
4.06
5.36
7.59
–
6.75
5.5
5.25
4.19
6.75
5.5
6.75
5.5
9.25
7.75
9.25
7.75
7.59
9.25
7.75
11.1
13
11.25
16
18.25
16.25
13
11.25
18.25
16.25
7.48
* A2 only
** Semi Machined backplates should be the first alternative for independent chucks
*** Fully Machined backplates supplied with spindle mounting bolts
NOTES: Backplates require some machining on the counterbore projection, see page 61 for more information
The projection on the backplate must be sized to fit each chuck
59
Semi-Machined Type A1/A2 Backplates
Designed for direct mounting on A1 and A2 spindle noses
• Provided with spindle mounting bolts
Chuck
Dia
Part
Number
Taper
Size
A
6¼
3-873-065
A-5
6.4
3-873-085
A-5
3-873-086
A-6
3-873-106
A-6
3-873-108
A-8
3-873-126
A-6
3-873-128
A-8
8
10
12½
7.99
9.96
12.52
B
C
D
E
Wt
lbs
1
3.13
4.125
3.25
6.5
4.125
3.25
19
5.252
4.19
15.5
0.207
4.19
38
6.75
5.50
33
5.252
4.19
45
6.75
5.50
62
1.5
1.3
1.3
1.97
1.3
2.17
1.50
3.17
4.06
BISON Fully-Machined Type L Backplates
• For plain back, self-centering chucks
• For direct mounting on type L spindle nose
Type 8250
Chuck
Dia
Part
Number
Taper
Size
Thread
Dia
A
B
C
B1
Wt
lbs
5"
7-879-051
L00
3-3/4"-6
4.92
2.13
2.2
0.71
10
7-879-061
L00
3-3/4"-6
2.13
2.2
7-879-062
L0
4-1/2"-6
2.52
2.6
0.71
13
7-879-081
L00
3-3/4"-6
2.13
2.2
7-879-082
L0
4-1/2"-6
0.71
22
7-879-083
L1
7-879-101
7-879-102
0.83
33
1.10
57
1.10
95
1.14
159
1.38
397
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
60
6.32
2.52
2.6
6"-6
2.99
3.35
L00
3-3/4"-6
2.13
2.20
L0
4-1/2"-6
2.52
2.60
7-879-103
L1
6"-6
2.99
3.35
7-879-104
L2
7-3/4"-5
3.50
4.29
7-879-122
L0
4-1/2"-6
2.52
2.60
7-879-123
L1
6"-6
2.99
3.35
7-879-124
L2
7-3/4"-5
3.50
4.29
7-879-162
L0
4-1/2"-6
2.52
2.60
7-879-163
L1
6"-6
2.99
3.35
7-879-164
L2
7-3/4"-5
3.50
4.29
7-879-165
L3
10-3/8"-4
4.02
5.43
7-879-204
L2
7-3/4"-5
3.50
4.29
7-879-205
L3
10-3/8"-4
4.02
5.43
7-879-254
L2
7-3/4"-5
3.78
4.29
7-879-255
L3
10-3/8"-4
4.02
5.43
7.91
9.88
12.44
15.83
19.76
24.82
Installation Instructions for Mounting Backplates onto Spindles
All Bison semi-machined and fully machined backplates will have the mounting dimensions for their
respective spindles fully machined. The fully machined backplates are designed for scroll plain back chucks,
which are .030", etc. They can be used on other styles/models, but the existing bolt hole patterns have
to be reviewed for mounting interference.
In all cases, the backplates will have to be finished/machined on the mounting projection, both on
the OD (approximately .030" oversize) and the length.
1.
With an indicator check the spindle to see if there is any radial or axial runout.
Refer to the chuck manual for spindle nose accuracy.
2.
Wipe the protective factory grease off the backplate, then mount it to the respective spindle
making sure that all fastening components are torqued appropriately.
3.
When initially installing the bolts, leave finish tightening to a second pass, and make sure to
alternate to the opposite bolt to evenly distribute pressure across the spindle’s taper. Using the
dial indicator, recheck the radial and axial backplate runout. If there are major differences,
loosen the backplate and refit it.
4.
Once the backplate is in place, a technique used to further ensure a close tolerance to the
chuck would be to blue the front face of the backplate and take a skim cut. In most cases
this is not required.
5.
Next, measure the OD and depth of the counterbore on the backside of the chuck; these will
become your working dimensions for final sizing. Depending on the size of the chuck, the OD
should be .001" to .005" less than the OD dimension and the length can be approximately .015"
to .030" shorter. This minus tolerance will eliminate the possibility of the projection pressing
against the back of the chuck, which can impact the scroll and create unnecessary friction with
the jaw teeth. This could make it difficult for the wrench to turn the pinions and in turn the jaws.
Machine the backplate until a snug fit has been achieved; this may require removing the backplate.
INSTRUCTIONS FOR MOUNTING BACKPLATES
WARNING: READ CARFULLY BEFORE MOUNTING BACK PLATES ONTO SPINDLES
Note: The purpose of this backplate projection to the chuck counterbore is to relieve
the stress on the mounting bolts, and is a critical part of maintaining chuck concentricity.
6.
The semi-machined backplates recommended for independent chucks do not have mounting
holes, and will have to be machined to the chucks bolt hole pattern. Dimensions are available
in the BISON catalog, online at www.toolmex.com, or by calling a customer service representative
at 800-992-4766 or 508-653-8897.
7.
Bolt hole patterns may require removal of the backplate for machining. Once machined, follow
the procedures from steps 2 and 3 before mounting.
8.
Re-indicate the chuck for basic run out on the OD and Face.
9.
Take a round piece of ground stock and enclose the jaws. Then, indicate the part for runout at
the jaws, ½ way across its length, and at the end. This will give you an idea of the parameters
that will have to be accounted for part production.
61
PRECISION SPARE PARTS
BISON Hard Master Jaws for 3 and 4-Jaw Steel Scroll Chucks
• American Standard Tongue and Groove Jaws
• Sold in sets
All solid jaws and master
jaws are manufactured to Bison’s
rigid specifications
12" and 16" Diameters
Chuck
Dia
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
32"
62
3-Jaw
4-Jaw
Part Number
7-885-305
–
7-885-306
7-885-406
7-885-308
7-885-408
7-885-310
7-885-410
7-885-312
7-885-412
7-885-316
7-885-416
7-885-320
7-885-420
7-885-325
7-885-425
7-885-332
–
5" to 10" Diameters
20" Diameter
K
H
5/8
3/4
7/8
1-1/16
1-1/4
57/64
1-1/8
1-3/8
1-9/16
1-7/8
G
F
J
S
inches
2-1/4
L
.4724
.4996 5/16
.5511
.1575
.126
.6299
.8661
.7496 1/2
1-1/2
25" to 32" Diameters
.2835
D
E
B
.3150
.3150
.7874
.3543
.4331
.5000
.5906
.3937
1.2598 .6299
.4724
.5512
OAL
A
Thread
M
5/16-18
.9843
1.1024
1.2598
1.4173
1.5748
2.1259
2.5590
3.1740
3.6220
4.3307
5.1181
6.5351
1.9685
8.2677
3/8-16
1/2-13
5/8-11
3/4-10
3-Jaw 4-Jaw
Wt of Set – lbs
0.93
–
1.20
1.60
2.10
2.80
3.20
4.27
5.10
6.80
7.30
–
14.4
–
27.1
–
BISON Hard Top Jaws for 3 and 4-Jaw Steel Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
7-883-305
7-883-306
7-883-308
7-883-310
7-883-312
7-883-316
7-883-320
7-883-325
3-Jaw
4-Jaw
Enhanced Serration
Part Number
–
–
–
7-883-3100
7-883-3120
7-883-3160
7-883-3120
7-883-3250
Chuck
Dia
M
H
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
5/8
3/4
7/8
1-1/16
1-1/4
57/64
1-1/8
1-3/8
1-9/16
1-7/8
1-1/2
2-1/4
G
.4996
.7496
–
7-883-406
7-883-408
7-883-410
7-883-412
7-883-416
7-883-420
7-883-425
J
K
.35
.59
Jaw Mounting Bolts
See page 48
D
.43
.71
.55
.78
.71
1.0
.87
1.3
E
F
.3129
.1260
.157
.5004
.2480
N
C
B
OAL
A
O
P
.315
.335
.374
.472
.512
.532
.689
.827
1.516
1.634
1.713
2.023
2.165
2.539
2.933
3.228
.866
.984
1.063
1.280
1.457
1.654
1.654
2.047
2.205
2.638
3.174
3.740
4.331
.57
.71
.85
.96
1.04
1.06
1.97
2.01
1.38
1.63
2.01
2.32
2.68
3.01
3.46
3.50
5.000
3-Jaw
4-Jaw
Wt of Set - lbs
0.93
–
1.20
1.60
2.10
2.80
3.20
4.27
5.10
6.80
7.30
–
14.40
–
27.10
–
Hard Top Jaws for 3-Jaw Scroll Chucks
• Sold in 3 piece sets
Chuck
Dia
Part
Number
M
H
6¼
3-883-306 0.7480 1.1260
8
3-883-308 0.8740 1.3799
10
3-883-310 1.0630 1.5669
G
J
K
0.4996 0.4173 0.6496
12½
3-883-312 1.2500 1.8740 0.7496
15¾
3-883-316 1.5000 2.2500
0.5394 0.8268
L
0.4331
0.5118
D
E
F
0.5906 0.5000
0.6890 1.0236 0.7283
N2
C
B
A
O
P
Q
Wt
lbs
0.3150 0.3543 1.6142 0.9843 2.6378 0.7047 1.6063 0.8268 0.12
0.3126
0.5512
N1
0.1575
0.1181
0.3543 0.3937 1.7717 1.0630 3.1496 0.8465 2.0079 0.9449 0.16
0.4528 0.4921 2.0276 1.2992 3.8189 0.9724 2.3228 1.0039 0.28
0.4921 0.5315 2.1654 1.4567 4.3307 1.0354 2.6811 1.1024 0.41
0.2362 0.5315 0.5709 2.5394 1.6535 5.0000 0.9567 2.9724 1.2795 0.61
Note: Hard Top Jaws are Interchangeable with Bison® Top Jaws
63
BISON I.D. Hard Solid Jaws for 3 and 4-Jaw Steel Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
4"
7-881-304
5"
4-Jaw
C
L
B
F
–
1.2598
1.6535
.5906
.2362
7-881-305
–
1.5748
2.0079
.7874
.3150
6-1/4"
7-881-306
7-881-406
2.0866
2.7559
.7874
.3150
Part Number
N
P
O
3-Jaw
4-Jaw
.2362
.2756
1.063
.433
.58
–
.3150
1.319
.512
1.2
–
.3937
1.772
.748
2.4
3.2
.4724
2.244
.906
3.2
4.3
.5512
2.736
1.102
5.2
7.0
.7087
3.268
1.358
8.7
12
.8661
3.898
1.417
16
–
1.0236
4.705
1.969
22
–
1.1024
5.866
2.598
38
–
inches
8"
7-881-308
7-881-408
2.1260
3.3465
.9843
.3543
10"
7-881-310
7-881-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-881-312
7-881-412
2.8740
4.9213
1.2598
.5000
15-3/4"
7-881-316
–
3.6220
5.7087
1.4173
.5906
20"
7-881-320
–
3.9370
7.0866
1.5748
25"
7-881-325
–
4.3307
8.8583
1.9685
.6299
Hard Solid Jaws
Wt of Set - lbs
E
.3150
.3937
.4724
.5512
BISON O.D. Hard Solid Jaws for 3 and 4-Jaw Steel Scroll Chucks
• Sold in sets
64
Chuck
Dia
3-Jaw
4"
7-880-304
5"
4-Jaw
C
L
B
F
–
1.2598
1.6535
.5906
.2362
7-880-305
–
1.5748
2.0079
.7874
6-1/4"
7-880-306
7-880-406
2.0866
2.7559
.7874
Part Number
P
O
3-Jaw
4-Jaw
.2362
.2756
1.063
.433
.58
–
.3150
1.319
.512
1.2
–
.3937
1.772
.748
2.4
3.2
.3150
.3150
.3937
8"
7-880-308
7-880-408
2.1260
3.3465
.9843
.3543
7-880-310
7-880-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-880-312
7-880-412
2.8740
4.9213
1.2598
.5000
15-3/4"
7-880-316
–
3.6220
5.7087
1.4173
.5906
20"
7-880-320
–
3.9370
7.0866
1.5748
25"
7-880-325
–
4.3307
8.8583
1.9685
N
inches
10"
.6299
Hard Solid Jaws
Wt of Set - lbs
E
.4724
.5512
.4724
2.244
.906
3.2
4.3
.5512
2.736
1.102
5.2
7.0
.7087
3.268
1.358
8.7
12
.8661
3.898
1.417
16
–
1.0236
4.705
1.969
22
–
1.1024
5.866
2.598
38
–
• Sold by piece
Chuck
Dia
Part Number
A
B
C
D
E
F
G
0.5910
1-1/4
0.8386
1-1/2
H
I
5"
7-884-305
2.520
0.866
1.520
6-1/4"
7-884-306
3.071
1.000
1.634
8"
7-884-308
3.543
1.063
1.713
0.9488
1-3/4
1.575
10"
7-884-310
4.173
1.280
2.028
1.0827
2-3/16
1.772
12-1/2"
7-884-312
4.724
1.457
2.165
1.2087
2-1/2
2.087
15-3/4"
7-884-316
5.512
1.654
2.539
20"
7-884-320
5.512
1.654
2.933
25"
7-884-325
6.299
2.047
3.288
.3129
.5000
1.000
.500
1.3443
5/16-18
1.339
.1260
1.3543
.283
3/8-16
1/2-13
.750
3
Bolt
Size
M
J
5/8-11
.2480
2.480
.406
3/4-10
Wt
per Pc
lbs
BISON Soft Top Jaws for 3 and 4-Jaw Steel Scroll Chucks
.66
1.01
1.43
2.54
3.53
4.85
5.29
9.26
BISON Soft Solid Jaws for 3 and 4-Jaw Steel Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
4"
7-882-304
5"
4-Jaw
Soft Solid Jaws
Wt of Set - lbs
C
L
B
F
E
N
P
O
3-Jaw
4-Jaw
–
1.2598
1.6535
.5906
.2362
.2362
.2756
1.063
.433
.86
–
7-882-305
–
1.5748
2.0079
.3150
1.319
.512
1.7
–
6-1/4"
7-882-306
7-882-406
2.0866
2.7559
.3937
1.772
.748
3.3
4.4
.4724
2.244
.906
5.3
7.1
.5512
2.736
1.102
9.0
12
.7087
3.268
1.358
13
17
.8661
3.898
1.417
16
–
1.0236
4.705
1.969
33
–
1.1024
5.866
2.598
57
–
Part Number
.7874
.3150
.3150
.3937
8"
7-882-308
7-882-408
2.1260
3.3465
.9843
.3543
10"
7-882-310
7-882-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-882-312
7-882-412
2.8740
4.9213
1.2598
.5000
15-3/4"
7-882-316
–
3.6220
5.7087
1.4173
.5906
20"
7-882-320
–
3.9370
7.0866
1.5748
25"
7-882-325
–
4.3307
8.8583
1.9685
.6299
.4724
.5512
65
BISON Enhanced Serration Jaws for Universal and Precision Scroll Chucks
• Jaw gripping surfaces serration 1/8"
• Sold in sets
• Jaws are recommended for heavy
machining applications
Chuck
Dia
Part
Number
10"
7-883-3100
12-1/2"
7-883-3120
15-3/4"
7-883-3160
20"
7-883-3200
25"
7-883-3250
32"
7-883-3250
BISON Spare Parts for 2, 3, and 4-Jaw Chucks
with Forged Steel Body
D = OD Diameter
H = Height
L = OAL
Scroll**
Chuck
Dia
Part Number
D
4"
7-887-304
5"
7-887-505
6-1/4"
8"
Pinion**
Pinion Sleeve
H
Wt
lbs
Part
Number
D
2.74
0.49
0.34
7-886-304
0.98
1.4
0.12
3.7
0.63
0.84
7-886-505
0.98
1.44
0.13
7-887-506
4.88
0.83
2.03
7-886-506
1.1
1.57
0.18
7-887-508
6.24
0.94
3.62
7-886-508
1.2
1.99
0.37
10"
7-887-510
7.82
1.1
4.54
7-886-510
1.4
2.36
12-1/2"
7-887-512
10.1
1.2
10.2
7-886-512
1.5
15-3/4"
7-887-516
12.9
1.3
22.7
7-886-516
1.7
20"
7-887-520
16.4
1.2
36.4
7-886-520
25"
7-887-525
21.3
1.6
66.0
7-886-525
2
Part
Number
Half Ring
ID
Part
Number
–
–
7-888-904*
–
7-888-505
0.98
7-888-705
1.52
7-888-506
1.1
7-888-706
1.72
7-888-508
1.2
7-888-708
1.85
0.44
7-888-510
1.4
7-888-710
1.94
2.85
0.71
7-888-512
1.5
7-888-712
2.17
3.66
1.3
7-888-516
1.7
7-888-716
2.42
4.45
2.1
7-888-520
7-888-720
2.76
5.24
2.5
7-888-525
7-888-725
2.95
H
Wt
lbs
2
D
** For steel body chucks only with 5" thru 25"
* Pinion screw
BISON Extended and Standard Length Wrenches*
Chuck
Dia
4"
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
Square
Size
Extended Length
Part
Number
L
–
–
–
–
.3543
.4331
.5512
7-889-008L
.6693
25"
.7480
32"
66
L
7-889-005
3.15
7-889-008
3.94
7-889-012
4.72
8.5
7-889-012L
20"
Standard Length
Part
Number
–
–
–
–
–
–
–
–
7-889-016
7-889-025
* Wrenches are spring loaded
for the operator’s safety
Removal of the spring is not
recommended and may void
chuck warranty
5.51
7-889-032
Universal Scroll Chucks
• These chucks can be used on all types of lathes, and on different kinds of milling,
drilling, and CNC attachments
• Chucks come with either American Standard two-piece tongue and groove jaws,
or two sets of hard solid jaws, one OD and one ID
• Plain Back and Direct Mount
• Semi-steel body
• Chuck body is made of high quality cast iron
All guideways and bearing surfaces are precisely machined
• Scroll plate is drop forged of fine alloy steel, and carefully case hardened
Thread flanks are ground on both sides
• The jaw’s teeth and guideways are hardened and fully ground on both sides
• Pinions are hardened and ground
32" Diameter Chuck
See page 93
Spare Parts: See page 92
Backplates: See pages 78-85
Chucks with Two-Piece
Reversible Jaws
1. Chuck Body
2. Back Cover
4. Pinion 7-886-3...
5. Pinion Screw 7-888-9...
6. Hard Master Jaws 7-885-3...
7. Hard Top Jaws 7-883-3...
8. Grease Nipple
12 and 13. Jaw Mounting Bolts 7-897-5...
UNIVERSAL SCROLL CHUCKS
2, 3, and 4-Jaw Universal Self-Centering Scroll Chucks
Chucks with Two Sets of
Hard Solid Jaws, OD and ID
1. Chuck Body
2. Back Cover
4. Pinion 7-886-3...
5. Pinion Screw 7-888-9...
6. Hard Solid ID Jaws 7-881-...
7. Hard Solid OD Jaws 7-880-...
8. Grease Nipple
67
2, 3, and 4-Jaw Universal Self-Centering Scroll Chucks
• Semi-steel body
• 3 Pinion design
• Plain back chucks
• Backplates required
BISON 3-Jaw Scroll Chucks
Type 3205
Chucks are provided with:
• 1 Chuck wrench
• 2 Hex keys
and larger
Chuck
Dia
Part
Number
Hole
Dia
Max Hole
Enlargement
RPM
max
Wt
lbs
5"
7-800-0500
1.2598
1.2598
3200
11
6-1/4"
7-800-0600
1.6535
1.8110
3000
22
8"
7-800-0800
2.1653
2.5591
2500
39
10"
7-800-1000
2.9921
3.4646
2000
55
12-1/2"
7-800-1200
4.0551
4.3307
1500
110
15-3/4"
7-800-1600
5.3543
5.5906
1000
187
20"
7-800-2000
7.4803
8.2283
700
320
25"
7-800-2500
9.9213
11.9291
500
551
32"
7-800-3200
10.5120
12.7953
300
886
Front View
Back View
3-Jaw Scroll Chucks with Two-Piece Hard Reversible Jaws
• 1 Self-ejecting chuck wrench
• 2 Hex keys
• Eye bolts provided with 12-1/2"
and 15-3/4" chucks
68
Chuck Lifting Eye Bolt
12-1/2" and 15-3/4" only
Chuck Dia
Part Number
Hole Dia
RPM max
Wt lbs
6-1/4"
3-800-0600
1.7717
3000
19.4
8"
3-800-0800
2.5591
2500
34
10"
3-800-1000
3.1496
2000
57
12-1/2"
3-800-1200
4.0945
1500
104
15-3/4"
3-800-1600
5.3543
1200
157
BISON 3-Jaw Scroll Chucks with Hard Solid Jaws
Type 3204
Chuck
Dia
Part
Number
Hole
Dia
Max Hole
Enlargement
RPM
max
Wt
lbs
3-1/4"
7-810-0300
.6299
.6299
4000
3.3
4"
7-810-0400
.7874
.7874
3500
6.17
5"
7-810-0500
1.2598
1.2598
3200
11
6-1/4"
7-810-0600
1.6535
1.8110
3000
22
8"
7-810-0800
2.1653
2.5591
2500
39
10"
7-810-1000
2.9921
3.4646
2000
55
12-1/2"
7-810-1200
4.0551
4.3307
1500
110
15-3/4"
7-810-1600
5.3543
5.5906
1000
187
20"
7-810-2000
7.4803
8.2283
700
320
25"
7-810-2500
9.9213
11.9291
500
551
• 1 Chuck wrench
• 2 Hex keys
and larger
3-Jaw Scroll Chucks with Hard Solid Jaws
• 1 Self-ejecting wrench
• 1 Hex key for mounting bolts
and 15-3/4"
Chuck Dia
Part Number
Hole Dia
RPM max
Wt lbs
6-1/4"
3-810-0600
1.7717
3000
19.4
8"
3-810-0800
2.5591
2500
34
10"
3-810-1000
3.1496
2000
57
12-1/2"
3-810-1200
4.0945
1500
104
15-3/4"
3-810-1600
5.3543
1200
157
69
2, 3 and 4-Jaw Universal Self-Centering Scroll Chucks
• Semi-steel body
• Plain back chucks
• Backplates required
BISON 2-Jaw Scroll Chucks with Soft Top Reversible Jaws
2 Pinion design
• 1 Set of soft top reversible jaws
• 1 Chuck wrench
• 2 Hex keys
• Semi-steel body
• Eye bolts for chuck size 15-3/4"
Type 3105
Chuck
Dia
Part
Number
Hole
Dia
Max Hole
Enlargement
RPM*
max
Wt
lbs
6-1/4"
7-830-0600
1.6535
1.8110
3000
22
8"
7-830-0800
2.1654
2.5591
2500
39
10"
7-830-1000
2.9921
3.4646
2000
55
12-1/2"
7-830-1200
4.0551
4.3307
1500
110
15-3/4"
7-830-1600
5.3543
5.5906
1000
187
*RPM max is rated for round workpiece ONLY
BISON 4-Jaw Scroll Chucks with Two-Piece Hard Reversible Jaws
3 Pinion design
Type 3605
• 1 Chuck wrench
• 2 Hex keys
• Semi-steel body
and larger
Chuck
Dia
Part
Number
Hole
Dia
Max Hole
Enlargement
RPM
max
Wt
lbs
5"
7-840-0500
1.2598
1.2598
3200
11
6-1/4"
7-840-0600
1.6535
1.8110
3000
22
8"
7-840-0800
2.1654
2.5591
2500
39
10"
7-840-1000
2.9921
3.4646
2000
55
12-1/2"
7-840-1200
4.0551
4.3307
1500
110
15-3/4"
7-840-1600
5.3543
5.5906
1000
187
20"
7-840-2000
7.480
8.2283
700
320
25"
7-840-2500
9.921
11.9291
500
551
BISON 4-Jaw Scroll Chucks with Hard Solid Jaws
3 Pinion design
Type 3604
• 1 Chuck wrench
• 1 Hex key
• Semi-steel body
and larger
70
Chuck
Dia
Part
Number
Hole
Dia
Max Hole
Enlargement
RPM
max
Wt
lbs
5”
7-845-0500
1.2598
1.2598
3200
11
6-1/4”
7-845-0600
1.6535
1.8110
3000
22
8”
7-845-0800
2.1654
2.5591
2500
39
10”
7-845-1000
2.9921
3.4646
2000
55
12-1/2”
7-845-1200
4.0551
4.3307
1500
110
15-3/4”
7-845-1600
5.3543
5.5906
1000
187
20”
7-845-2000
7.480
8.2283
700
320
Top Jaws
Chuck
Dia
D
F
E
d
C
H
6-1/4"
5.5118
4.9213
1.6535
.1575
8"
6.9291
6.2992
2.1654
.1575
h
Width
2.756
1.697
1.575
3.150
1.776
1.575
Part
Thread
No. of
Number
M
Bolts
7-897-108
M10 x 1.5
M12 x 1.75
10"
8.8189
7.8740
2.9921
.1969
3.543
2.071
1.850
7-897-110
12-1/2"
11.2598
10.2362
4.0551
.1969
3.937
2.240
2.047
7-897-112
15-3/4"
14.2519
12.9921
5.3543
.1969
4.331
2.598
2.047
7-897-125
6
M16 x 2
BISON Principal Dimensions for 3 and 4-Jaw Chucks – Back Mounting
Chuck
Dia
D
F
E
d
C
H
h
h1
3-1/4"
2.6378
2.2047
0.6299
0.1181
1.732
-
0.512
4"
3.2677
2.7559
0.7874
0.1181
1.969
-
0.669
5"
4.252
3.7402
1.2598
0.1575
2.205
1.575
0.787
6-1/4"
5.5118
4.9213
1.6535
0.1575
2.539
1.693
1.26
8"
6.9291
6.2992
2.1654
0.1575
2.953
1.772
1.142
8.8189
7.874
10"
Part
Thread
No. of
L
Number
M
Bolts
7-897-103
M6 x 1
7-897-105
M8 x 1.25
7-897-108
M10 x 1.5
M12 x 1.75
2.9921
0.1969
3.347
2.087
1.339
7-897-110
12-1/2"
11.2598 10.2362
4.0551
0.1969
3.701
2.244
1.693
7-897-112
15-3/4"
14.2519 12.9921
5.3543
0.1969
4.134
2.639
2.165
20"
18.0314 16.5354
7.4803
0.1969
4.724
3.15
2.362
25"
23.0709 21.4567
9.9212
0.2756
5.315
3.425
2.756
32"
see page 93
3
0.98
1.18
M16 x 2
7-897-125
7-897-132
BISON Principal Dimensions for 2-Jaw Chucks – Back Mounting
6
1.57
see page 93
see page 25 for clamping ranges for 3 and 4-Jaw Bison chucks
Principal Dimensions 3-Jaw Chucks
øD
øF
øE
ød
M
Chuck
Dia D
E
(H7)
F
d
H
h
6-1/4"
4.9213
5.5118
1.7717
2.5591
1.7323
8"
6.2992
6.9291
2.5591
2.9528
1.8504
7.8740
8.8189
3.1496
3.1496
2.1457
12-1/2"
10"
10.2362 11.2598
4.0945
3.5433
2.3031
15-3/4"
12.9921 14.2520
5.3543
3.9370
2.6378
C
Bolt
Size M
0.1575
6xM10
C
H
h
6xM12
0.1969
6xM16
71
BISON 3-Jaw, Type A1 and A2, Direct Mount Chucks
• Semi-steel body
• Type A1 spindle has a 2 bolt hole pattern, inside and outside the taper. Either an A1 or A2 chuck will fit
• Type A2 spindle has a 1 bolt pattern outside the taper. Only an A2 chuck will fit
Type A1 Mount
Bolt Hole Pattern
Type A2 Mount
Bolt Hole Pattern
Type A
L
Type 3215
Chuck
Dia
D
2.4374 3.2505
0.563 3.2087 1.693
–
2.4374 3.2505
0.563
7-897-522
7/16-14
–
3.2500
4.188
0.625
7-897-533
1/2-13
4.1260
–
3.2505
0.563
7-897-524
7/16-14
4-1/8
–
3.2500
4.188
0.625 4.0748 2.087
7-897-534
1/2-13
3-1/2
–
4.3750 5.5007
0.688
7-897-545
5/8-11
3-1/2
4.188
0.63
7-897-537
1/2-13
4-3/4
4.3750 5.5007
0.688
7-897-548
5/8-11
4-1/4
0.63
7-897-552
1/2-13
5
0.709 5.0591 2.639
7-897-552
5/8-11
5
0.75
7-897-564
3/4-10
4-1/4
7-897-567
3/4-10
6
7-897-569
3/4-10
7
7-897-574
7/8-9
6
7-897-584
1-8
6
Hole
Dia
d
6-1/4'' 7-801-0615
A1-5
1.6535
7-801-0815
A1-5
1.6535
7-801-0816
A1-6
2.1653
7-801-1015
A2-5
2.9921
7-801-1016
A1-6
2.1635
7-801-1018
A1-8
2.9921
7-801-1216
A2-6
4.0551
4.0551
7-801-1218
A1-8
3.1496
4.3307
7-801-1616
A2-6
4.0551
4.0551
5.2520
–
4.188
15-3/4'' 7-801-1618
A2-8
5.3543
5.3543
1000 203 6.7480
–
5.5007
7-801-1619 A1-11
5.1181
5.5906
7-801-2029 A2-11
7.5905
7.5905
700 353 9.2520
–
7.7507
0.787
7.5905
9.2520
–
7.7507
0.75
13.000
–
11.251
0.813
18.25
–
16.252 0.8661 7.0866 3.425
8''
10''
12-1/2''
20''
25''
32''
72
–
Chuck Mounting Bolts
Part
No. of
Thread
L
Number
Bolts
7-897-521 7/16-14 2-3/4
Taper
Size
Part
Number
7-801-2511 A2-11
7-801-2515 A2-15
7-801-3220 A2-20
7.4803
12.598
Max Hole RPM Wt
Enlargement max lbs
1.8110
2.5591
3000 22
2500 42
2.9921
3.4646
11.00
12.598
2000 71
1500 121
B
(A2)
5.2520
–
–
500 628
300 847
B1
(A1)
–
G
6.5000 7.7507
C/C1
H
h
3.5827 1.772
4.6338 2.244
5.748
6.496
3.091
3.425
3-1/8
3
6
2-Piece Hard Reversible Jaws
• All chucks with A1 mount can be installed
on A1 spindle nose only
• All chucks with A2 mount can be installed on either
A1 or A2 spindle noses
Standard Parts
• 2-Piece hard reversible jaws
Type A1 Mount Bolt Hole Pattern
• 1 Hex key for jaw bolts
• Eye bolts provided with 12-1/2" and 15-3/4" chucks
Type A2 Mount Bolt Hole Pattern
Spindle Nose
Type A
UNIVERSAL SCROLL CHUCKS DIRECT MOUNT
3-Jaw Chucks, Type A1 and A2, Direct Mount
L
Chuck
Dia D
Part
Number
Taper
Size
Hole
Dia d
B
(A2)
B1
(A1)
G
C
H
h
6-1/4"
3-801-0615
A1-5
1.6535
–
2.4374
3.2504
0.5630
3.2087
1.6929
3-801-0815
A1-5
1.6535
–
2.4374
3.2504
0.5630
3-801-0816
A1-6
2.1654
–
3.2500
4.1880
0.6250
3-801-1015
A2-5
2.9921
4.1260
-
3.2504
0.5630
3-801-1016
A1-6
2.1654
–
3.2500
4.1880
0.6250
3-801-1018
A1-8
2.9921
–
4.3750
5.5008
0.6880
3-801-1216
A2-6
3.9370
5.2520
-
4.1880
0.6303
3-801-1218
A1-8
3.1496
–
4.3750
5.5008
0.6880
3-801-1619
A1-11
4.9213
–
6.5000
7.7507
0.7500
8"
10"
12-1/2"
15-3/4"
3.6220
1.8504
3.8976
2.1457
Chuck Mounting Bolts
Thread
L
7/16-14
2-3/4
7/16-14
1/2-13
3-1/8
Qty
3
7/16-14
1/2-13
4.4094
2.3031
4.8031
2.6378
1/2-13
4-3/4
5/8-11
4-3/16
3/4-10
4-1/4
Wt
lbs
3000
22
2500
42
2000
4-1/8
5/8-11
RPM
max
71
6
1500
121
1000
203
73
BISON 3-Jaw, Camlock Type D1, Direct Mount Chucks
with Two-Piece Jaws
• Semi-steel body
Type D
Type 3245
Part
Number
Taper
Size
Hole
Dia
d
Max Hole
Enlargement
RPM
max
Wt
lbs
B
G
C
H
h
5"
7-803-0534
D1-4
1.2598
1.2598
3200
11
3.2520
2.5005
.5118
2.7559
1.575
7-803-0633
D1-3
2.7795
2.1250
7-803-0634
D1-4
3.2520
2.5005
7-803-0833
D1-3
2.7795
2.1250
7-803-0834
D1-4
3.2520
2.5005
7-803-0835
D1-5
4.1260
3.2505
7-803-0836
D1-6
5.2520
4.1880
7-803-1035
D1-5
4.1260
3.2505
.5629
7-803-1036
D1-6
5.2520
4.1880
.6299
7-803-1038
D1-8
6.7480
5.5007
.7087
7-803-1236
D1-6
5.2520
4.1880
.6299
4.6338
7-803-1238
D1-8
6.7480
5.5007
.7087
4.6338
7-803-1239
D1-11
9.2520
7.7507
.7874
5.5118
7-803-1636
D1-6
5.2520
4.1880
.6299
7-803-1638
D1-8
6.7480
5.5007
.7087
7-803-1639
D1-11
5.5906
9.2520
7.7507
7-803-2038
D1-8
5.3543
5.3543
6.7480
7-803-2039
D1-11
7.5984
7.5984
7-803-2539
D1-11
7.5984
11.9291
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
74
Camlock Studs
Chuck
Dia
D
1.6535
1.9685
2.0275
2.0275
2.3622
2.1653
3000
2500
20
42
2.5591
2.9921
2.9921
3.4646
2000
71
4.0551
4.0551
4.0551
5.3543
4.3307
1500
112
4.0551
5.3543
1000
223
700
331
500
604
.5118
3.2087
1.693
.5118
3.5827
1.772
.5629
4.0748
2.087
Dia
Thread
5/8
M10 x 1
9/16
5/8
M10 x 1
9/16
M10 x 1
5/8
M10 x 1
3/4
M12 x 1
7/8
M16 x 1.5
3/4
M12 x 1
7/8
M16 x 1.5
1
M20 x 1.5
7/8
M16 x 1.5
1
M20 x 1.5
1-3/16
M22 x 1.5
7/8
M16 x 1.5
1
M20 x 1.5
.7874
1-3/16
M22 x 1.5
5.5007
.7087
1
M20 x 1.5
9.2520
7.7507
.7874
1-3/16
M22 x 1.5
9.2520
7.7507
.7874
1-3/16
M22 x 1.5
5.0591
2.244
2.639
5.7480
3.150
6.4960
3.425
No. of
Studs
3
6
2-Piece Hard Reversible Jaws
Standard Parts
• 2-Piece hard reversible jaws
• 1 Hex key for jaw bolts
• Eye bolts provided with 12-1/2" and 15-3/4" chucks
Spindle Nose
Type D
D1-4
D1-6 to D1-11
Chuck
Dia D
Part
Number
Taper
Size
Hole
Dia d
F
G
C
H
h
6-1/4"
3-803-0634
D1-4
1.7717
3.2520
2.5005
0.5118
3.0709
1.7323
3-803-0834
D1-4
3.2520
2.5005
3-803-0836
D1-6
5.2520
4.1880
0.5118
3.6220
1.8504
3-803-1036
D1-6
5.2520
4.1880
0.6299
3-803-1038
D1-8
6.7480
5.5007
0.7087
3.8976
2.1457
3-803-1236
D1-6
5.2520
4.1880
0.6299
3-803-1238
D1-8
6.7480
5.5007
0.7087
4.4094
2.3031
6.7480
5.5007
0.7087
9.2520
7.7507
0.7874
4.8031
2.6378
8"
10"
12-1/2"
15-3/4"
3-803-1638
D1-8
3-803-1639
D1-11
2.1654
3.1496
3.9370
5.3543
Camlock Studs
Diameter
Thread
Qty M
RPM
max
Wt
lbs
5/8
M10x1
3
3000
20
5/8
M10x1
3
7/8
M16x1.5
6
2500
42
7/8
M16x1.5
1
M20x1.5
2000
71
7/8
M16x1.5
1
M20x1.5
1500
112
1
M20x1.5
1-3/16
M22x1.5
1000
223
6
3-Jaw Chucks, Camlock Type D1, Direct Mount
75
BISON Camlock Studs with Inch and Metric Threads and Set Screws
for Type D1 Direct Mount Chucks
• Sold by piece
NOTE: Always use metric
threaded studs
with BISON chucks
No. of
Studs
Camlock Studs Metric
Set Screw
Camlock Studs English
Taper
Size
Dia
D1-3
9/16"
D1-4
5/8"
D1-5
3/4"
M12 x 1
7-899-105
1/2 - 20
7-899-405
D1-6
7/8"
M16 x 1.5
7-899-106
5/8 - 18
7-899-406
D1-8
1"
M20 x 1.5
7-899-108
3/4 - 16
7-899-408
D1-11
1-3/16"
M22 x 1.5
7-899-111
7/8 - 14
7-899-411
D1-15
1-3/8"
M24 x 1.5
7-899-115
–
–
3
6
Thread
Part Number
Part Number
Thread
7-899-103
M10 x 1
7-899-104
7/16 - 20
7-899-305
7-899-310
Part Number
7-899-403
7-899-404
BISON 3-Jaw, Type L, Direct Mount Chucks with Two-Piece Jaws
• Semi-steel body
Type L
Type 3255
Chuck
Dia
D
6-1/4"
8"
10"
12-1/2"
15-3/4"
76
Part
Number
Taper
Size
7-804-0641
L00
7-804-0642
L0
7-804-0841
L00
7-804-0842
L0
7-804-0843
L1
7-804-1042
L0
7-804-1043
L1
7-804-1044
L2
7-804-1242
L0
7-804-1243
L1
7-804-1244
L2
7-804-1643
L1
7-804-1644
L2
Hole
Dia
d
Max Hole
Enlargement
RPM
max
1.6535
1.8110
3000
2.50
2.1654
2.5591
2500
2.9921
2.9921
4.0551
3.4646
4.0551
2000
1500
4.3307
4.0551
4.0551
1000
Thread
T
G
J
C
H
3-3/4 - 6
2-3/4
.5512
2.1260
4.0551
4-1/2 - 6
3-1/4
.5906
2.5197
4.4488
3-3/4 - 6
2-3/4
.5512
2.1260
4.3701
4-1/2 - 6
3-1/4
.5906
2.5197
4.7638
6-6
4-1/8
.6299
2.9921
5.2362
4-1/2 - 6
3-1/4
.5906
2.5197
5.0394
6-6
4-1/8
.6299
2.9921
5.5118
7-3/4 - 5
5-1/4
.8661
3.5039
6.0236
4-1/2 - 6
3-1/4
.5906
2.5197
5.3937
6-6
4-1/8
.6299
2.9921
5.8661
7-3/4 - 5
5-1/4
.8661
3.5039
6.3780
6-6
4-1/8
.6299
2.9921
6.1811
7-3/4 - 5
5-1/4
.8661
3.5039
6.6929
h
Wt
lbs
1.693
23
1.772
42
2.087
64
2.244
134
2.639
251
• Semi-steel body
Diameters: 5" thru 12.5"
Diameter: 4" Only
Threaded
Type 3285 / 3284
Chuck
Dia
D
Thread
T
Part
Number
1 - 10
7-805-0451
4"
1-1/8 - 12W**
7-805-0455
1-1/2 - 8
7-805-0452
Hole
Dia
d
RPM
max*
.7874
3500
7-805-0551
7-805-0552
1-1/2 - 8
7-805-0652
2-1/4 - 8
7-805-0653
1-1/2 - 8
7-805-0852
2-1/4 - 8
7-805-0853
2-3/8 - 6
7-805-0854
10"
2-1/4 - 8
7-805-1053
2.9921
12-1/2"
2-3/8 - 6
7-805-1254
4.0551
8"
H
h
1.250
1/2
3.543
–
h1
Wt
lbs
.669
8.8
1.5150
1 - 10
6-1/4"
k
1.0150
1-1/2 - 8
5"
G
1.2598
3200
1.5748
3000
2.1653
2500
1.0150
1.5150
1/2
3.740
3.740
1.575
–
1.5150
1/2
4.134
2.2600
5/8
4.331
1.5150
1/2
4.528
2.2600
5/8
4.724
2.3850
3/4
4.922
2000
2.2600
5/8
5.512
2.087
–
75
1500
2.3850
3/4
5.906
2.244
–
121
1.693
–
12
23
–
1.772
45
BISON 3-Jaw, Threaded, Direct Mount Chucks
** 1-1/8 - 12W is a Whitworth thread
NOTES: Prior to ordering a threaded mount chuck, please check the spindle nose
diameter "G" and dimension "k". Depending on the lathe manufacturer,
these dimensions may vary slightly from those specified in the above chart
Metric threads are often confused with traditional threads;
please use thread pitch gage to confirm exact pitch prior to ordering
See page 21 for spindle dimensions
77
UNIVERSAL BACKPLATES
Principal Mounting Dimensions for Toolmex Backplates
• After selecting a suitable backplate
for the lathe, mount it onto the spindle
nose of the lathe
• Proper mounting is very important in
order to secure concentricity between
the lathe’s spindle and the chuck
• The back of the lathe chuck has a
counterbore diameter, E, finished in
H7 class, with depth, C
• Prior to maching the backplate,
accurately measure the chuck’s
counterbore diameter, E, and depth, C
• A good press fit, H6/k5, is most desirable
• To ensure satisfactory concentricity,
it is important that this procedure is
done accurately
See full back plate machining
instructions on page 61
Chuck
Dia
A=F
D
D1
D3
D2
E (H7)
Dx (k5)
3-1/4"
2.6378
3.1496
3.1693
0.0252
2.2835
2.2047
2.2047
4"
3.2677
3.3970
3.9567
2.8346
2.7559
2.7559
0.3307
5"
4.2520
4.9213
4.9409
3.8189
3.7402
3.7402
6-1/4"
5.5118
6.2992
6.3189
0.4134
5.0000
4.9213
4.9213
8"
6.9291
7.8740
7.9134
0.5118
6.3780
6.2992
6.2992
S*
Sx**
C
0.0787
0.0984
0.1181
0.1181
0.1378
0.1575
0.1575
0.1772
0.1969
10"
8.8189
9.8425
9.8819
7.9528
7.8740
7.8740
12-1/2"
11.2598
12.4016
12.4409
10.3150
10.2362
10.2362
15-3/4"
14.2520
15.7480
15.8268
13.1102
12.9221
12.9221
20"
18.0315
19.6850
19.7638
16.6535
16.5354
16.5354
25"
23.0709
24.8031
24.9213
21.5748
21.4567
21.4567
0.2362
0.2559
0.2756
32"
14.5000
–
–
17.7170
17.7170
–
–
–
0.7874
0.6693
–
* S = length of the boss of the supplied backplate
** Sx = length of the boss after machining
BISON Rough Backplates for Scroll Chucks with Threaded Spindles
Type 8205
78
Chuck
Dia
Part
Number
3"
7-870-105
4"
7-870-105
5"
7-870-105
6-1/4"
7-870-106
6.70
8"
7-870-108
8.30
D
d
5.20
.71
.98
Wt
lbs
D1
K
L
3.46
.98
2.20
4.02
1.18
2.83
22
34
4.4
12
10"
7-870-110
10.24
1.57
4.53
1.26
3.54
12-1/2"
7-870-112
12.30
1.97
6.77
1.26
4.02
66
15-3/4"
7-870-116
16.34
2.76
9.06
2.17
4.92
154
25"
7-870-125
25.20
4.72
11.81
3.35
7.09
496
Chuck
Dia
Thread
M
Part
Number
A
B
C
D
h
E
Wt
lbs
5"
1-1/2"-8
3-871-052
1.535
2.677
1.514
5.079
0.709
0.5
9.9
1-1/2"-8
3-871-062
1.535
2-1/4"-8
3-871-063
1.791
2-1/4"-8
3-871-083
1.791
6-1/4"
8"
3.189
3.583
1.514
2.26
2.26
6.535
0.787
8.11
0.866
0.5
0.626
0.626
11.9
Rough Backplates for Scroll Chucks with Threaded Spindles
13
BISON Semi-Finished Threaded Backplates for Threaded Spindles
Type 8206
Chuck
Dia
4"
5"
6-1/4"
8"
10"
12-1/2"
Thread
M
Part
Number
1-10
7-871-041
1-1/2-8
7-871-042
A
1.535
1-10
7-871-051
1-1/2-8
7-871-052
1-1/2-8
7-871-062
1.535
2-1/4-8
7-871-063
1.791
1-1/2-8
7-871-082
1.535
2-1/4-8
7-871-083
1.791
2-1/4-8
7-871-103
1.791
2-3/8-6
7-871-104
2.047
2-3/8-6
7-871-124
2-3/4-8
7-871-125*
1.535
2.047
B
C
2.165
1.01500
2.677
1.51421
2.165
1.01500
2.677
1.51421
3.189
3.583
4.173
4.331
1.51421
2.26000
1.51421
2.26000
2.26000
2.38500
2.38500
2.76000
D
h
E
Wt
lbs
4.095
.709
.5000
8
5.079
.709
.5000
10
6.535
.787
8.110
.866
10.079
.984
12.638
1.102
.5000
.6260
12
.5000
12
.6260
13
.6260
22
.7480
25
.7480
33
Mounting Instructions:
see page 61
79
BISON Fully Machined Threaded Backplates
for Bison Plain Back Self-Centering Chucks
Type 8204
Chuck
Dia
Thread
D
Part
Number
A
C
B
B1
E
Wt
lbs
3-1/4"
3/4 - 16
7-922-035
3.15
–
.6299
.6299
.1969
4
1 - 10
7-922-043
1-1/8 - 12W
7-922-045
1-1/2 - 8
7-922-046
4"
5"
6-1/4"
M39 x 4
7-922-051
2-3/16 - 10
7-922-053
2-3/16 - 10
7-922-063
3.94
1.97
.5000
1.50
.551
2.36
4.92
6.3
.5630
5
.5000
3.00
2.00
.75
3.11
1.61
.689
3.11
1.61
.768
.6260
11
.6260
13
NOTE: Part number series 7-922-backplates require some machining on the counterbore
projection, see page 61 for more information
80
BISON Semi-Machined and Fully Machined Type D1 Backplates
• The number of camlock studs needed varies depending on the spindle size, please refer to the table below
• Plain back chucks require backplates which may require machining
• Designed for direct mounting on camlock spindle nose
Semi-Machined D1 Backplates
Fully Machined D1 Backplates
Type 8240
Type 8242
Chuck
Dia
Taper
Size
4"
D1-4
Fully Machined Backplates***
Part
Dia
B
B1
Number
A
7-878-044
5.97
1.02
.87
D1-3
7-878-053
D1-4
7-878-054
D1-3
7-878-063
D1-4
7-878-064
D1-5
7-878-065
D1-6
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
4.94
1.02
.57
.87
Semi-Machined Backplates**
Part
Dia
Flange
Wt
Number
A
Thickness
lbs
–
–
–
–
Wt
lbs
3.65
5.3
Stud
Dia
No.
of
Studs
Hole
Dia
C
D
G
5/8
2.40
3.25
2.50
–
–
–
–
9/16
2.02
2.78
2.13
–
–
–
–
5/8
2.40
3.25
2.50
9/16
2.02
2.78
2.13
5/8
2.40
3.25
2.50
3/4
3.13
4.13
3.25
4.06
5.25
4.19
4.06
6.75
5.50
2.02
2.78
2.13
2.40
3.25
2.50
3/4
3.13
4.13
3.25
7/8
4.06
5.25
4.19
3/4
3.13
4.13
3.25
7/8
4.06
5.25
4.19
1
5.35
6.75
5.50
7/8
4.06
5.25
4.19
1
5.35
6.75
5.50
7.59
9.25
7.75
7/8
4.06
5.25
4.19
1
5.35
6.75
5.50
7-878-0630
1.02
3
1.06
.71
1.18
1.0
7-878-066
1.44
1.32
–
–
–
–
7/8
D1-8
7-878-068
1.69
1.53
–
–
–
–
1
D1-3
7-878-083
–
–
9/16
D1-4
7-878-084
.71
7-878-0840
1.73
5/8
D1-5
7-878-085
D1-6
7-878-086
1.44
D1-5
7-878-105
1.18
D1-6
7-878-106
D1-8
7-878-108
1.54
D1-6
7-878-126
1.56
D1-8
7-878-128
D1-11
7-878-129
D1-6
7-878-166
D1-8
7-878-168
D1-11
7-878-169
1.85
7-878-1690
1.96
1-3/16
7.59
9.25
7.75
D1-8
7-878-208
1.54
7-878-2080
1.81
1
5.35
6.75
5.50
D1-11
7-878-209
1-3/16
7.59
9.25
7.75
D1-11
7-878-259
24.82
D1-15
7-878-265
24.82
6.32
1.06
7.89
9.86
12.42
1.18
1.44
1.65
1.85
7-878-0640
9.5
15.4
1.26
.87
1.36
.94
19.70
1.54
7-878-0650
7-878-0850
8.00
7-878-0860
24.3
7-878-1050
24.3
7-878-1060
39.7
7-878-1080
39.7
1.36
7-878-1280
9.96
12.52
7-878-1290
79
7-878-1680
1.97
27
1.93
35
2.76
7-878-1660
1.10
1.14
9.3
1.38
7-878-1260
1.44
15.77
6.38
2.17
49
1-3/16
2.17
15.94
93
6
132
1.85
1.14
232
7-878-2590
25.00
2.83
232
1-3/16
7.59
9.25
7.75
1.97
1.14
232
–
–
–
–
1-3/8
11.00
13.0
11.25
7-878-2090
2.83
159
3
1.14
1.85
19.88
2.76
6
** See mounting instructions on page 61
***The projection on the backplate must be sized to fit each chuck
81
Fully Machined Type D1 Backplates
Chuck
Dia
5"
6-1/4"
8"
10"
12-1/2"
82
Taper
Size
Part
Number
Stud
Dia
No. of
Studs
Hole Dia
C
D
G
A
B
B1
D1-4
3-878-054
5/8
3
2.40
3.25
2.50
4.92
1.02
0.87
5.3
D1-6
3-878-056
7/8
6
3.13
5.25
4.19
7.09
1.61
1.43
11.5
D1-4
3-878-064
5/8
3
2.40
3.25
2.50
6.30
1.06
0.71
9.5
D1-4
3-878-084
5/8
3
2.40
3.25
2.50
1.06
0.71
15.4
D1-6
3-878-086
7/8
6
4.06
5.25
4.19
1.44
1.26
15.4
D1-6
3-878-106
7/8
4.06
5.25
4.19
1.44
0.87
24.3
D1-8
3-878-108
1
5.35
6.75
5.50
1.54
1.36
39.7
D1-6
3-878-126
7/8
4.06
5.25
4.19
1.56
0.94
D1-8
3-878-128
1
5.35
6.75
5.50
1.65
0.94
6
7.87
9.84
12.40
Wt
lbs
39.7
BISON Semi-Machined and Fully Machined Type A1/A2 Backplates
Fully Machined
Type 8210
Semi-Machined
Type 8212
Type 8210
Chuck
Dia
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
36" 40" 49"
Taper
Size
Type 8212
Fully Machined***
Semi-Machined**
Part Number
Thru
Hole C
Wt
lbs
Part Number
Thru
Hole C
A-6
7-873-0560*
3.13
5.3
7-873-056
2.13
A-8
–
–
–
7-873-058
3.15
A-5
–
–
–
7-873-065
A-5
7-873-0850*
–
18
7-873-085
A-6
–
–
–
A-6
–
–
A-8
–
A-6
A
B
D
E
1.02
5.25
4.19
1.81
6.75
5.5
Wt
lbs
6.5
5
3.13
6.5
6.4
3.13
19
7-873-086
4.06
15.5
–
7-873-106
4.06
38
–
–
7-873-108
5.35
33
–
–
–
7-873-126
4.06
45
A-8
–
–
–
7-873-128
5.35
62
A-8
–
–
–
7-873-168
5.35
85
A-11
7-873-169H
7.59
51
7-873-169
7.59
141
A-11
–
–
–
7-873-209*
7.59
133
A2-15
7-873-2095
11.08
71
–
–
–
A-11
–
–
–
7-873-259*
7.59
158
A-15
7-873-2600
11.08
154
7-873-2595
11.08
218
A-20
–
–
–
7-873-2598*
16
156
A2-15
–
–
–
7-873-3615*
11.08
242
A2-20
–
–
–
7-873-3620*
16
249
7.99
9.96
12.52
15.94
19.88
25
21.85
1
4.125
3.25
1.5
4.125
3.25
1.3
5.25
4.19
1.3
5.25
4.19
1.97
6.75
5.5
1.3
5.25
4.19
1.77
6.75
5.5
1.7
6.75
5.5
2.95
9.25
7.75
1.77
9.25
7.75
1.77
9.25
7.75
13
11.25
2.205
18.25
16.25
2.78
13
11.25
3.15
18.25
16.25
* A2 only
** Semi Machined backplates should be the first alternative for independent chucks
*** Fully Machined backplates supplied with spindle mounting bolts
NOTES: Backplates require some machining on the counterbore projection, see page 61 for more information
The projection on the backplate must be sized to fit each chuck
83
Semi-Machined Type A1/A2 Backplates
Chuck
Dia
Taper
Size
Part
Number
A
B
C
D
E
Wt
lbs
6-1/4"
A-5
3-873-065
6.4
1
3.13
4.125
3.25
6.5
A-5
3-873-085
7.99
1.5
1.50
4.125
3.25
19
A-6
3-873-086
7.99
1.3
1.50
5.252
4.19
15.5
A-6
3-873-106
9.96
1.3
3.17
0.207
4.19
38
A-8
3-873-108
9.96
1.97
3.17
6.75
5.50
33
A-6
3-873-126
12.52
1.3
4.06
5.252
4.19
45
A-8
3-873-128
12.52
2.17
4.06
6.75
5.50
62
8"
10"
12-1/2"
BISON Fully Machined Type L Backplates
• For plain back self-centering chucks
• For direct mounting on type L spindle nose
Type 8250
Chuck
Dia
Taper
Size
Part
Number
Thread
Dia
A
B
C
B1
Wt
lbs
5"
L00
7-879-051
3-3/4 - 6
4.92
2.13
2.2
0.71
10
L00
7-879-061
3-3/4 - 6
2.13
2.2
L0
7-879-062
4-1/2 - 6
2.52
2.6
0.71
13
L00
7-879-081
3-3/4 - 6
2.13
2.2
L0
7-879-082
4-1/2 - 6
0.71
22
L1
7-879-083
L00
L0
0.83
33
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
84
6.32
2.52
2.6
6-6
2.99
3.35
7-879-101
3-3/4 - 6
2.13
2.20
7-879-102
4-1/2 - 6
2.52
2.60
L1
7-879-103
6-6
2.99
3.35
L2
7-879-104
7-3/4 - 5
3.50
4.29
L0
7-879-122
4-1/2 - 6
2.52
2.60
L1
7-879-123
6-6
2.99
3.35
L2
7-879-124
7-3/4 - 5
3.50
4.29
L0
7-879-162
4-1/2 - 6
2.52
2.60
L1
7-879-163
6-6
2.99
3.35
L2
7-879-164
7-3/4 - 5
3.50
4.29
L3
7-879-165
10-3/8 - 4
4.02
5.43
L2
7-879-204
7-3/4 - 5
3.50
4.29
L3
7-879-205
10-3/8 - 4
4.02
5.43
L2
7-879-254
7-3/4 - 5
3.78
4.29
L3
7-879-255
10-3/8 - 4
4.02
5.43
7.91
9.88
12.44
15.83
19.76
24.82
39
1.10
57
1.10
95
1.14
159
1.38
397
NOTE: Backplates require some
machining on the counterbore
projection, see page 61 for
more information
BISON Type C, DIN 55027 Spindle Backplates
Type 8230
Type 8232
Fully Machined Backplate
Chuck
Dia
Taper
Size
5"
6-1/4"
8"
10"
12-1/2"
15-3/4"
20"
25"
Semi-Machined Backplate
Flange
Dia
Thickness
A
L
Part
Number
Dia
A
C-2
7-921-052
4.94
C-4
7-921-064
C-5
7-921-065
C-4
7-921-084
C-5
7-921-085
C-6
7-921-086
7-921-0860
C-5
7-921-105
7-921-1050
C-6
7-921-106
C-6
7-921-126
G
B
Hole
Dia
d
–
-
0
2.480
1.654
1.59
–
.768
3
3.25
2.50
2.40
1.14
9.3
.768
4
4.125
3.25
3.13
–
–
.579
5.3
–
–
–
–
–
–
7-921-0650
6.38
–
–
.83
9.5
7.89
.83
15
.83
24
7-921-0850
7-921-1060
8.00
9.96
7-921-1260
12.42
No.
of
Studs
Part
Number
6.32
9.86
Stud
Dia
K
Wt
lbs
35
2.76
2.40
3.13
.846
4
5.25
4.19
4.06
.768
4
4.125
3.25
3.13
.846
4
5.25
4.19
4.06
.846
4
5.25
4.19
4.06
1.063
4
6.75
5.50
5.35
7-921-1290
2.17
1.339
6
9.25
7.75
7.59
C-8
7-921-168
7-921-1680
2.76
1.063
4
6.75
5.50
5.35
C-11
7-921-169
1.339
6
9.25
7.75
7.59
C-8
7-921-208
1.063
4
6.75
5.50
5.35
C-11
7-921-209
1.339
6
9.25
7.75
7.59
C-11
7-921-259
1.339
6
9.25
7.75
7.59
–
19.70
1.34
132
24.82
1.65
231
7-921-2590
–
15.94
–
25.00
2.17
2.50
3.25
7-921-129
7-921-1690
12.52
3.25
4.125
7-921-128
80
7-921-1280
1.93
27
3
4
C-8
1.30
40
1.38
.768
.768
C-11
15.77
1.30
1.97
Wt
lbs
1.96
–
–
2.83
49
93
–
232
BISON DIN Studs
Taper
Size
Part
Number
Stud
Dia
inch
Stud
Dia
mm
Thread
mm
No.
of
Studs
C-4
7-921-904
.7677
19.5
M10 - 39
3
C-5
7-921-905
.7677
19.5
M10 - 43
C-6
7-921-906
.8465
21.5
M12 - 50
C-8
7-921-908
1.063
27.0
M16 - 60
C-11
7-921-911
1.339
34.0
M20 - 75
4
6
85
UNIVERSAL SPARE PARTS
BISON Hard Master Jaws for 2, 3 and 4-Jaw Self-Centering Scroll Chucks
• Sold in sets
All solid jaws and master jaws
are manufactured to Bison’s
rigid specifications
Chuck
Dia
2-Jaw
3-Jaw
4-Jaw
Part Number
5"
–
7-885-305
7-885-405
6-1/4"
7-885-206
7-885-306
7-885-406
8"
7-885-208
7-885-308
7-885-408
10"
7-885-210
7-885-310
7-885-410
12-1/2"
7-885-212
7-885-312
7-885-412
15-3/4"
7-885-216
7-885-316
7-885-416
20"
–
7-885-320
7-885-420
25"
–
7-885-325
7-885-425
32"
–
7-885-325
–
Chuck
Dia
K
H
5"
5/8
57/64
6-1/4""
3/4
1-1/8
8"
7/8
1-3/8
10"
1-1/16
1-9/16
12-1/2"
1-1/4
1-7/8
15-3/4"
20"
25"
12-1/2" and 15-3/4" Diameters
5" to 10" Diameters
G
F
.4996
5/16
J
L
.4724
.1575
.5511
.6299
.7496
1-1/2
20" Diameter
2-1/4
32"
.8661
1/2
.2835
1.2598
25" to 32" Diameters
OAL
A
C
2.1259
1.102
2.5590
1.142
.9843
3.1102
1.299
1.1024
3.6220
1.417
1.2598
4.3307
1.575
1.4173
5.1181
1.929
1.5748
6.5351
2.126
D
E
B
.3150
.3150
.7874
.3543
.3937
.4331
.5000
.4724
.5906
.6299
.5512
1.9685
8.2677
8.8583
2.146
S
Thread
M
Wt*
lbs
5/16-18
.31
3/8-16
.126
1/2-13
5/8-11
.40
.68
1.06
1.70
2.43
4.81
3/4-10
7.36
7.90
* Approximate weight of one jaw
86
• American Standard tongue and groove jaws
Chuck
Dia
Part
Number
K
H
6-1/4"
3-885-306
0.0294
1.1260
8"
3-885-308
0.0344
1.3799
10"
3-885-310
0.0419
1.5669
12-1/2" 3-885-312
0.0492
1.8740
15-3/4" 3-885-316
0.0591
2.2500
G
F
0.4996
0.3126
J
0.1575
0.7496
0.5000
L
D
0.6299
0.3543
0.3937
0.7087
0.3937
0.4724
0.8268
0.2756
E
0.5315
0.9449
0.5118
B
A
0.7874
2.5591
0.9843
3.1496
1.1024
3.7402
1.2598
4.4882
1.4173
5.1181
Thread
M
S
3/8"-16
0.1181
1/2"-13
5/8"-11
C
Wt
lbs
0.0511
0.08
0.0543
0.14
0.0589
0.22
0.0666
0.35
0.0713
0.50
Hard Master Jaws
BISON Hard Top Jaws for 3 and 4-Jaw Scroll Chucks
• Sold in sets
• Standard jaws are designed for finishing and medium duty machining
• Heavy duty jaws are designed for heavy duty machining
Chuck
Dia
3-Jaw
4-Jaw
5"
7-883-305
7-883-405
6-1/4"
7-883-306
7-883-406
8"
7-883-308
7-883-408
10"
7-883-310
7-883-410
12-1/2"
7-883-312
7-883-412
15-3/4"
7-883-316
7-883-416
20"
7-883-320
7-883-420
25"
7-883-325
7-883-425
32"
7-883-325
7-883-425
Chuck
Dia
K
H
5"
5/8
57/64
6-1/4"
3/4
1-1/8
8"
7/8
1-3/8
10"
1-1/16
1-9/16
12-1/2"
1-1/4
1-7/8
G
.4996
.7496
15-3/4"
20"
25"
Standard
Jaws
Part Number
1-1/2
2-1/4
.7496
J
K
.35
.59
.43
.71
.55
.78
.71
1.0
.87
D
E
F
.3129
.1260
.157
.5004
1.3
32"
.2480
N
C
B
OAL
A
O
P
Wt per Pc
lbs
.315
1.516
.866
2.205
.57
1.38
.37
.335
1.634
.984
2.638
.71
1.63
.56
.374
1.713
1.063
3.347
.85
2.01
.79
.472
2.023
1.280
3.740
.96
2.32
1.32
.512
2.165
1.457
4.331
1.04
2.68
2.01
.532
2.539
1.06
3.01
2.98
.689
2.933
1.97
3.46
3.42
2.01
3.50
5.34
.827
3.228
1.654
2.047
2.047
5.000
87
Hard Top Jaws for 3 and 4-Jaw Scroll Chucks
• American Standard tongue and groove jaws
Chuck
Dia
Part
Number
M
H
6-1/4" 3-883-306 0.7480 1.1260
8"
3-883-308 0.8740 1.3799
10"
3-883-310 1.0630 1.5669
G
J
K
0.4996 0.4173 0.6496
12-1/2" 3-883-312 1.2500 1.8740 0.7496
15-3/4" 3-883-316 1.5000 2.2500
0.5394 0.8268
L
D
0.4331
E
F
0.5512
N2
C
B
A
O
P
Q
Wt
lbs
0.3150 0.3543 1.6142 0.9843 2.6378 0.7047 1.6063 0.8268 0.12
0.3126
0.5118
N1
0.1575
0.5906 0.5000
0.1181
0.3543 0.3937 1.7717 1.0630 3.1496 0.8465 2.0079 0.9449 0.16
0.4528 0.4921 2.0276 1.2992 3.8189 0.9724 2.3228 1.0039 0.28
0.4921 0.5315 2.1654 1.4567 4.3307 1.0354 2.6811 1.1024 0.41
0.6890 1.0236 0.7283
0.2362 0.5315 0.5709 2.5394 1.6535 5.0000 0.9567 2.9724 1.2795 0.61
BISON Mounting Bolts for Hard and Soft Top Jaws
Chuck
Dia
Thread
5"
5/16"-18
Screw No. 1
Part
L
Number
7-897-503
3/8"-16
7-897-510
1/2"-13
7-897-530
5/8"-11
7-897-540
6-1/4"
8"
10"
12-1/2"
15-3/4"
3/4
7-897-512
1-1/4
1
7-897-531
1-1/2
1-1/4
7-897-541
1-3/4
7-897-561
3
7-897-562
3-1/4
20"
25"
3/4"-10
7-897-558
Screw No. 2
Part
L
Number
7-897-504
1
1-1/2
32"
L
BISON Extended and Standard Length Wrenches
88
Extended Length
Part
L
Number
7-889-003L
3.15
Chuck
Dia
Square
Size
3"
.2344
4"
.3543
–
–
5"
.3543
–
–
6-1/4"
.4331
8"
.4331
7-889-008L
Standard Length
Part
L
Number
7-889-003
2.36
Heavy Duty
Part
Number
7-889-003C
7-889-005
3.15
7-889-005C
7-889-008
3.94
7-889-008C
7-889-012
4.72
7-889-012C
8.5
10"
.5512
12-1/2"
.5512
15-3/4"
.6693
–
–
20"
.7480
–
–
25"
.7480
–
–
32"
.7480
–
–
7-889-012L
7-889-016
7-889-025
7-889-032
7-889-016C
5.51
–
–
–
• Jaw gripping surfaces serration 1/8"
• Sold in sets
• Jaws are recommended for heavy machining applications
Enhanced Serration
Jaws
Part Number
10"
7-883-3100
12"
7-883-3120
16"
7-883-3160
20"
7-883-3120
25" and 32"
7-883-3250
Chuck
Dia
BISON ID Hard Solid Jaws for 3 and 4-Jaw Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
3"
7-881-303
4"
7-881-304
5"
4-Jaw
C
L
B
–
1.1024
1.2598
.4331
–
1.2598
1.6535
.5906
7-881-305
7-881-405
1.5748
2.0079
6-1/4"
7-881-306
7-881-406
2.0866
2.7559
8"
7-881-308
7-881-408
2.1260
Part Number
F
E
.2362
.2362
.7874
.3150
.3150
3.3459
.9843
.3543
.3937
10"
7-881-310
7-881-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-881-312
7-881-412
2.9528
4.9213
1.2598
.5000
15-3/4"
7-881-316
7-881-416
3.6220
5.7087
1.4173
.5906
20"
7-881-320
7-881-420
3.9370
7.0866
1.5748
25"
7-881-325
7-881-425
4.3307
8.8583
1.9685
.6299
.4724
.5512
N
P
O
Wt per Pc
lbs
.2362
0.827
.374
.10
.2756
1.063
.433
.19
.3150
1.313
.512
.40
.3937
1.772
.748
.80
.4724
2.244
.906
1.07
.5512
2.736
1.102
1.73
.7087
3.268
1.358
2.90
.8661
3.898
1.417
5.20
1.0236
4.705
1.969
7.33
1.1024
5.866
2.598
13.00
BISON Enhanced Serration Jaws for Universal and Precision Scroll Chucks
ID Hard Solid Jaws for 3-Jaw Scroll Chuck
Chuck
Dia
Part Number
L
B
H
6-1/4"
3-881-306
2.756
0.787
2.126
8"
3-881-308
3.347
0.984
2.402
10"
3-881-310
4.134
1.102
2.717
12-1/2"
3-881-312
4.921
1.260
2.953
15-3/4"
3-881-316
5.709
1.417
3.622
h
0.4724
0.7087
89
BISON OD Hard Solid Jaws for 3 and 4-Jaw Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
3"
7-880-303
4"
7-880-304
5"
4-Jaw
C
L
B
–
1.1024
1.2598
.4331
–
1.2598
1.6535
.5906
7-880-305
7-880-405
1.5748
2.0079
6-1/4"
7-880-306
7-880-406
2.0866
2.7559
8"
7-880-308
7-880-408
2.1260
Part Number
F
E
.2362
.2362
.7874
.3150
.3150
3.3459
.9843
.3543
.3937
10"
7-880-310
7-880-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-880-312
7-880-412
2.9528
4.9213
1.2598
.5000
15-3/4"
7-880-316
7-880-416
3.6220
5.7087
1.4173
.5906
20"
7-880-320
7-880-420
3.9370
7.0866
1.5748
25"
7-880-325
7-880-425
4.3307
8.8583
1.9685
.6299
.4724
.5512
N
P
O
Wt per Pc
lbs
.2362
0.827
.374
.10
.2756
1.063
.433
.19
.3150
1.313
.512
.40
.3937
1.772
.748
.80
.4724
2.244
.906
1.07
.5512
2.736
1.102
1.73
.7087
3.268
1.358
2.90
.8661
3.898
1.417
5.20
1.0236
4.705
1.969
7.33
1.1024
5.866
2.598
13.00
OD Hard Solid Jaws for 3-Jaw Scroll Chuck
90
Chuck
Dia
Part Number
L
B
H
6-1/4"
3-880-306
2.756
0.787
2.126
8"
3-880-308
3.347
0.984
2.402
10"
3-880-310
4.134
1.102
2.717
12-1/2"
3-880-312
4.921
1.260
2.953
15-3/4"
3-880-316
5.709
1.417
3.622
h
0.4724
0.7087
• Sold by piece
Jaw mounting bolts can
be found on page 88
2-Jaw
Chuck
Dia
3 and 4-Jaw
Part Number
A
3 and
4-Jaw
B
2-Jaw
B
C
–
1.520
5"
–
7-884-305
2.520
0.866
6-1/4"
7-884-206
7-884-306
3.071
1.000
8"
7-884-208
7-884-308
3.543
1.063
10"
7-884-210
7-884-310
4.173
1.280
12-1/2"
7-884-212
7-884-312
4.724
1.457
15-3/4"
–
7-884-316
5.512
1.654
20"
–
7-884-320
5.512
1.654
–
25"
–
7-884-325
6.299
2.047
–
32"
–
7-884-325
6.299
2.047
–
E
F
0.5910
1-1/4
0.8386
1-1/2
1.713
0.9488
1-3/4
1.575
2.028
1.0827
2-1/8
1.772
2.165
1.2087
2-1/2
2.087
1.634
1.575
1.850
2.047
2.539
2.933
D
.3129
.5000
G
H
3
J
1.000
.500
1.339
Bolt Size
M
3-Jaw
Wt
per Pc
lbs
5/16-18
.1260
.283
.66
1.01
3/8-16
1.43
2.54
1/2-13
3.53
5/8-11
.750
1.3543
I
2.480
.2480
.406
3.288
BISON Soft Top Jaws for 2, 3, and 4-Jaw Chucks
4.85
5.29
3/4-10
9.26
BISON Soft Solid Jaws for 3 and 4-Jaw Scroll Chucks
• Sold in sets
Chuck
Dia
3-Jaw
4-Jaw
3"
7-882-303
4"
7-882-304
5"
C
L
B
–
1.1024
1.2598
.4331
–
1.2598
1.6535
.5906
7-882-305
–
1.5748
2.0079
6-1/4"
7-882-306
7-882-406
2.0866
2.7559
Part Number
F
E
.2362
.2362
.7874
.3150
.3150
.3937
8"
7-882-308
7-882-408
2.1260
3.3459
.9843
.3543
10"
7-882-310
7-882-410
2.4803
4.1339
1.1024
.4331
12-1/2"
7-882-312
7-882-412
2.9528
4.9213
1.2598
.5000
15-3/4"
7-882-316
7-882-416
3.6220
5.7087
1.4173
.5906
20"
7-882-320
–
3.9370
7.0866
1.5748
25"
7-882-325
–
4.3307
8.8583
1.9685
.6299
.4724
Wt per Pc
lbs
.13
.29
.57
1.10
1.77
3.00
4.20
5.33
.5512
11.00
19.00
91
BISON Spare Parts for 2, 3, and 4-Jaw Chucks with Semi-Steel Body
Scroll**
1.02
Wt
lbs
.04
Pinion Screw
Part
Number
7-888-904
1.40
.12
7-888-904
1.63
.14
7-888-906
1.1
1.87
.20
7-888-906
7-886-308
1.2
2.30
.42
7-888-910
4.28
7-886-310
1.4
2.72
.51
7-888-910
.98
9.50
7-886-312
1.5
3.60
.77
7-888-910
12.9
1.10
18.8
7-886-316
1.7
4.41
1.48
7-888-920
7-887-320
16.4
1.18
36
7-886-320
2.0
5.30
2.09
7-888-920
25"
7-887-325
21.3
1.57
66
7-886-325
2.0
5.87
2.51
7-888-920
32"
7-887-332
27.4
1.77
148
7-886-332
2.0
8.07
4.41
7-888-920
Chuck
Dia
Pinion**
OD
H
3"
Part
Number
7-887-303
Part
Number
7-886-303
OD
OAL
.41
Wt
lbs
.16
2.16
.75
4"
7-887-304
2.74
.49
.34
7-886-304
.98
5"
7-887-305
3.70
.53
.66
7-886-305
.98
6-1/4"
7-887-306
4.88
.71
1.85
7-886-306
8"
7-887-308
6.26
.79
2.65
10"
7-887-310
7.84
.87
12-1/2"
7-887-312
10.1
15-3/4"
7-887-316
20"
** For semi-steel chucks only
Eye Bolts
Chuck
Dia
15-3/4" and 20"
L
D
.9843
1.1811
25" and 28"
1.2205
1.3386
32", 36" and 40"
1.4961
1.5748
49"
1.7717
1.9685
Spare Parts for 3-Jaw Scroll Chucks with Semi-Steel Body
• Sold by the piece
OD = outside diameter
L = overall length
Chuck
Dia
92
Scroll
Part
Number
6-1/4"
8"
Pinion
OD
Part
Number
OD
3-887-306
4.8031
3-886-306
3-887-308
6.1811
3-886-308
10"
3-887-310
7.7559
12-1/2"
3-887-312
15-3/4"
3-887-316
Wrench
Pinion Screw
L
Part
Number
Square
Size
Part
Number
OD
L
1.1429
2.0669
3-889-306
0.3937
3-888-306
0.1850
1.3780
1.2245
2.4134
3-889-308
0.4724
3-888-308
0.2441
1.7126
3-886-310
1.3061
2.9134
3-889-310
0.4724
3-888-310
0.2441
1.7126
10.1181
3-886-312
1.4286
3.8583
3-889-312
0.5118
3-888-312
0.3228
1.9685
12.6772
3-886-316
1.5510
4.4882
3-889-316
0.5512
3-888-316
0.3228
1.9685

Toolmex Workholding Catalog - 2010

Transcription

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