ShopNotes No. 115 Page 1 of 7 ©2010 August Home Publishing. All rights reserved.
!/2"-DIA.HOLE
CL
CL
CL
!/2"-DIA.HOLE
1" -DIA.HOLE
!/2"-DIA.HOLE
!/2"-DIA.HOLE
CL
CL
!/2"-DIA.HOLE
CL
!/2"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
!/4"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
DRIVE GEARFULL-SCALE PATTERN
(3!/4" O.D.)(NEED ONE)
INDEXING WHEELFULL-SCALE
RIGHT HALF-PATTERN(NEED 1)
20-TOOTHFULL-SCALE PATTERN
(6!/8" O.D.)(NEED ONE)
LOCK GEARFULL-SCALE PATTERN
(NEED ONE)
10-TOOTHFULL-SCALE
PATTERN(3!/4" O.D.)
(NEED THREE)
40-TOOTHFULL-SCALE
QUARTER-PATTERN (11!#/16" O.D.)
(NEED 4)
30-TOOTHFULL-SCALE
HALF-PATTERN(9" O.D)(NEED 2)
INDEXING WHEELFULL-SCALE
LEFT HALF-PATTERN(NEED 1)
!/4"-DIA.HOLES
&/16"-DIA.HOLE
!/4"-DIA.HOLES
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
&/16"-DIA.HOLE
NOTE: USE CENTERLINES TO ALIGN TWO 30-TOOTH HALF-PATTERNS TO FORM A FULL PATTERN NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH QUARTER-PATTERNS TO FORM A FULL PATTERN
4!/2"-RAD.
4!/2"-RAD.
MillingMachine
Patterns
ShopNotes No. 115 Page 2 of 7 ©2010 August Home Publishing. All rights reserved.
!/2"-DIA.HOLE
CL
CL
CL
!/2"-DIA.HOLE
1" -DIA.HOLE
!/2"-DIA.HOLE
!/2"-DIA.HOLE
CL
CL
!/2"-DIA.HOLE
CL
!/2"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
!/4"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
DRIVE GEARFULL-SCALE PATTERN
(3!/4" O.D.)(NEED ONE)
INDEXING WHEELFULL-SCALE
RIGHT HALF-PATTERN(NEED 1)
20-TOOTHFULL-SCALE PATTERN
(6!/8" O.D.)(NEED ONE)
LOCK GEARFULL-SCALE PATTERN
(NEED ONE)
10-TOOTHFULL-SCALE
PATTERN(3!/4" O.D.)
(NEED THREE)
40-TOOTHFULL-SCALE
QUARTER-PATTERN (11!#/16" O.D.)
(NEED 4)
30-TOOTHFULL-SCALE
HALF-PATTERN(9" O.D)(NEED 2)
INDEXING WHEELFULL-SCALE
LEFT HALF-PATTERN(NEED 1)
!/4"-DIA.HOLES
&/16"-DIA.HOLE
!/4"-DIA.HOLES
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
&/16"-DIA.HOLE
NOTE: USE CENTERLINES TO ALIGN TWO 30-TOOTH HALF-PATTERNS TO FORM A FULL PATTERN NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH QUARTER-PATTERNS TO FORM A FULL PATTERN
4!/2"-RAD.
4!/2"-RAD.
ShopNotes No. 115 Page 3 of 7 ©2010 August Home Publishing. All rights reserved.
!/2"-DIA.HOLE
CL
CL
CL
!/2"-DIA.HOLE
1" -DIA.HOLE
!/2"-DIA.HOLE
!/2"-DIA.HOLE
CL
CL
!/2"-DIA.HOLE
CL
!/2"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
!/4"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
DRIVE GEARFULL-SCALE PATTERN
(3!/4" O.D.)(NEED ONE)
INDEXING WHEELFULL-SCALE
RIGHT HALF-PATTERN(NEED 1)
20-TOOTHFULL-SCALE PATTERN
(6!/8" O.D.)(NEED ONE)
LOCK GEARFULL-SCALE PATTERN
(NEED ONE)
10-TOOTHFULL-SCALE
PATTERN(3!/4" O.D.)
(NEED THREE)
40-TOOTHFULL-SCALE
QUARTER-PATTERN (11!#/16" O.D.)
(NEED 4)
30-TOOTHFULL-SCALE
HALF-PATTERN(9" O.D)(NEED 2)
INDEXING WHEELFULL-SCALE
LEFT HALF-PATTERN(NEED 1)
!/4"-DIA.HOLES
&/16"-DIA.HOLE
!/4"-DIA.HOLES
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
&/16"-DIA.HOLE
NOTE: USE CENTERLINES TO ALIGN TWO 30-TOOTH HALF-PATTERNS TO FORM A FULL PATTERN NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH QUARTER-PATTERNS TO FORM A FULL PATTERN
4!/2"-RAD.
4!/2"-RAD.
ShopNotes No. 115 Page 4 of 7 ©2010 August Home Publishing. All rights reserved.
!/2"-DIA.HOLE
CL
CL
CL
!/2"-DIA.HOLE
1" -DIA.HOLE
!/2"-DIA.HOLE
!/2"-DIA.HOLE
CL
CL
!/2"-DIA.HOLE
CL
!/2"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
!/4"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
DRIVE GEARFULL-SCALE PATTERN
(3!/4" O.D.)(NEED ONE)
INDEXING WHEELFULL-SCALE
RIGHT HALF-PATTERN(NEED 1)
20-TOOTHFULL-SCALE PATTERN
(6!/8" O.D.)(NEED ONE)
LOCK GEARFULL-SCALE PATTERN
(NEED ONE)
10-TOOTHFULL-SCALE
PATTERN(3!/4" O.D.)
(NEED THREE)
40-TOOTHFULL-SCALE
QUARTER-PATTERN (11!#/16" O.D.)
(NEED 4)
30-TOOTHFULL-SCALE
HALF-PATTERN(9" O.D)(NEED 2)
INDEXING WHEELFULL-SCALE
LEFT HALF-PATTERN(NEED 1)
!/4"-DIA.HOLES
&/16"-DIA.HOLE
!/4"-DIA.HOLES
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
&/16"-DIA.HOLE
NOTE: USE CENTERLINES TO ALIGN TWO 30-TOOTH HALF-PATTERNS TO FORM A FULL PATTERN NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH QUARTER-PATTERNS TO FORM A FULL PATTERN
4!/2"-RAD.
4!/2"-RAD.
ShopNotes No. 115 Page 5 of 7 ©2010 August Home Publishing. All rights reserved.
!/2"-DIA.HOLE
CL
CL
CL
!/2"-DIA.HOLE
1" -DIA.HOLE
!/2"-DIA.HOLE
!/2"-DIA.HOLE
CL
CL
!/2"-DIA.HOLE
CL
!/2"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
!/4"-DIA.HOLE
%/16"-DIA.HOLE
!/4"-DIA.HOLE
DRIVE GEARFULL-SCALE PATTERN
(3!/4" O.D.)(NEED ONE)
INDEXING WHEELFULL-SCALE
RIGHT HALF-PATTERN(NEED 1)
20-TOOTHFULL-SCALE PATTERN
(6!/8" O.D.)(NEED ONE)
LOCK GEARFULL-SCALE PATTERN
(NEED ONE)
10-TOOTHFULL-SCALE
PATTERN(3!/4" O.D.)
(NEED THREE)
40-TOOTHFULL-SCALE
QUARTER-PATTERN (11!#/16" O.D.)
(NEED 4)
30-TOOTHFULL-SCALE
HALF-PATTERN(9" O.D)(NEED 2)
INDEXING WHEELFULL-SCALE
LEFT HALF-PATTERN(NEED 1)
!/4"-DIA.HOLES
&/16"-DIA.HOLE
!/4"-DIA.HOLES
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
NOTE: USE CENTERLINES TO ALIGN BOTH INDEXING WHEEL HALF-PATTERNS TO FORM A FULL PATTERN
&/16"-DIA.HOLE
NOTE: USE CENTERLINES TO ALIGN TWO 30-TOOTH HALF-PATTERNS TO FORM A FULL PATTERN NOTE: USE CENTERLINES
TO ALIGN FOUR 40-TOOTH QUARTER-PATTERNS TO FORM A FULL PATTERN
4!/2"-RAD.
4!/2"-RAD.
ShopNotes No. 115 Page 6 of 7 ©2010 August Home Publishing. All rights reserved.
Milling MachineGear Setups
FOURCOMPLETE
SPIRALPATTERNS
SINGLESPIRAL
PATTERN
10-20GEAR
A
1-8 GEARRATIO
1%/8
10-30GEAR
B
2#/8
1-12 GEARRATIO
3#/16
1-16 GEARRATIO
10-40GEAR
C
1-24 GEARRATIO
1-32 GEARRATIO
1-48 GEARRATIO
D
3
4!#/16
10-30GEAR
10-20GEAR
10-40GEAR
10-20GEAR
6#/8
D
2
9%/8
D
1
10-40GEAR
10-30GEAR
INSIDE END VIEW
OUTSIDE END VIEW
INSIDE END VIEW
OUTSIDE END VIEW
FOURCOMPLETE
SPIRALPATTERNS
SINGLESPIRAL
PATTERN
10-20GEAR
A
1-8 GEARRATIO
1%/8
10-30GEAR
B
2#/8
1-12 GEARRATIO
3#/16
1-16 GEARRATIO
10-40GEAR
C
1-24 GEARRATIO
1-32 GEARRATIO
1-48 GEARRATIO
D
3
4!#/16
10-30GEAR
10-20GEAR
10-40GEAR
10-20GEAR
6#/8
D
2
9%/8
D
1
10-40GEAR
10-30GEAR
INSIDE END VIEW
OUTSIDE END VIEW
INSIDE END VIEW
OUTSIDE END VIEW
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 spac-ing 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 dif-ferent gear setups and bit combinations on a practice blank to determine the best spac-ing 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.
{ 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).
ShopNotes No. 115 Page 7 of 7 ©2010 August Home Publishing. All rights reserved.
FOURCOMPLETE
SPIRALPATTERNS
SINGLESPIRAL
PATTERN
10-20GEAR
A
1-8 GEARRATIO
1%/8
10-30GEAR
B
2#/8
1-12 GEARRATIO
3#/16
1-16 GEARRATIO
10-40GEAR
C
1-24 GEARRATIO
1-32 GEARRATIO
1-48 GEARRATIO
D
3
4!#/16
10-30GEAR
10-20GEAR
10-40GEAR
10-20GEAR
6#/8
D
2
9%/8
D
1
10-40GEAR
10-30GEAR
INSIDE END VIEW
OUTSIDE END VIEW
INSIDE END VIEW
OUTSIDE END VIEW