Milling Machine

Milling
Machine
Patterns
!/2"-DIA.
HOLE
20-TOOTH
FULL-SCALE PATTERN
(6!/8" O.D.)
(NEED ONE)
!/4"-DIA.
HOLE
DRIVE GEAR
FULL-SCALE PATTERN
(3!/4" O.D.)
(NEED ONE)
LOCK GEAR
FULL-SCALE PATTERN
(NEED ONE)
1" -DIA.
HOLE
%/16"-DIA.
HOLE
ShopNotes No. 115
Page 1 of 7
©2010 August Home Publishing. All rights reserved.
INDEXING WHEEL
FULL-SCALE
LEFT HALF-PATTERN
(NEED 1)
&/16"-DIA.
HOLE
NOTE: USE CENTERLINES
TO ALIGN BOTH INDEXING
WHEEL HALF-PATTERNS TO
FORM A FULL PATTERN
CL
!/4 "-DIA.
HOLES
!/2"-DIA.
HOLE
4!/2"-RAD.
ShopNotes No. 115
Page 2 of 7
©2010 August Home Publishing. All rights reserved.
INDEXING WHEEL
FULL-SCALE
RIGHT HALF-PATTERN
(NEED 1)
&/16"-DIA.
HOLE
NOTE: USE CENTERLINES
TO ALIGN BOTH INDEXING
WHEEL HALF-PATTERNS TO
FORM A FULL PATTERN
CL
!/2"-DIA.
HOLE
!/4 "-DIA.
HOLES
4!/2"-RAD.
ShopNotes No. 115
Page 3 of 7
©2010 August Home Publishing. All rights reserved.
CL
NOTE: USE CENTERLINES
TO ALIGN TWO 30-TOOTH
HALF-PATTERNS TO FORM
A FULL PATTERN
30-TOOTH
FULL-SCALE
HALF-PATTERN
(9" O.D)
(NEED 2)
CL
!/2"-DIA.
HOLE
!/4"-DIA.
HOLE
ShopNotes No. 115
Page 4 of 7
©2010 August Home Publishing. All rights reserved.
10-TOOTH
FULL-SCALE
PATTERN
(3!/4" O.D.)
(NEED THREE)
!/2"-DIA.
HOLE
NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH
QUARTER-PATTERNS TO
FORM A FULL PATTERN
%/16"-DIA.
HOLE
40-TOOTH
FULL-SCALE
QUARTER-PATTERN
(11!#/16" O.D.)
(NEED 4)
!/4"-DIA.
HOLE
!/2"-DIA.
HOLE
CL
CL
ShopNotes No. 115
Page 5 of 7
©2010 August Home Publishing. All rights reserved.
Milling Machine
Gear Setups
The router milling machine allows for six
different gear setups to create spiral patterns
(like flutes and reeds). Depending on the
setup, the gear ratio, and therefore the spacing of the spirals changes. The direction of
the spiral depends on whether one or two
gears are used to connect the drive gear and
main gears, as you can see in the drawings
below and on the following page.
Each set of drawings below shows the
gear setup and resulting spiral pattern. You
can use the information to determine what
will work best for the type of bit you’re
using. It’s always good idea to try out different gear setups and bit combinations on
a practice blank to determine the best spacing and number of spirals.
Over time, you’ll develop a sense for the
number of spirals you can use in a design
depending on the gear ratio and the size of
the bit (or a portion of a bit) you use.
SINGLE
SPIRAL
PATTERN
FOUR
COMPLETE
SPIRAL
PATTERNS
{ Spiral Pattern. Each specific gear setup results in a particular
spiral spacing (left example). The indexing wheel ensures that spirals are
evenly spaced for a consistent look once they’re complete (right example).
10-20
GEAR
A
1-8 GEAR
RATIO
16
1
9
1
3
2
15
6
5
5
7
12
7
4
1%/8
6
13
8
3
4
2
14
11
INSIDE END VIEW
10
8
9
OUTSIDE END VIEW
10-30
GEAR
16
9
1
5
3
5
7
12
7
4
2#/8
6
13
8
6
10
4
2
14
1
3
2
15
11
ShopNotes No. 115
B
1-12 GEAR
RATIO
9
8
Page 6 of 7
©2010 August Home Publishing. All rights reserved.
10-40
GEAR
1-16 GEAR
RATIO
C
16
1
9
1
3
2
15
5
7
12
7
4
5
3#/16
6
13
8
3
4
2
14
6
11
INSIDE END VIEW
10
8
9
OUTSIDE END VIEW
10-20
GEAR
10-30
GEAR
1-24 GEAR
RATIO
3
16
1
9
1
3
2
4
3
4
5
7
12
7
6
13
8
4!#/16
5
14
2
15
6
11
D
10
8
9
10-20
GEAR
10-40
GEAR
2
D
16
1
9
1
3
2
4
5
7
12
7
4
5
6#/8
6
13
8
3
14
2
15
6
11
1-32 GEAR
RATIO
10
8
9
10-30
GEAR
10-40
GEAR
1
9
1
3
16
1
3
5
5
7
12
7
4
9%/8
6
13
8
6
10
4
2
14
ShopNotes No. 115
D
2
15
11
1-48 GEAR
RATIO
9
8
Page 7 of 7
©2010 August Home Publishing. All rights reserved.