milling machine patterns and setup

ShopNotes No. 115 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

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!/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


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)


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


&/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


!/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



RIGHT HALF-PATTERN(NEED 1)

20-TOOTHFULL-SCALE PATTERN


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)


LEFT HALF-PATTERN(NEED 1)

!/4"-DIA.HOLES

&/16"-DIA.HOLE

!/4"-DIA.HOLES



&/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.


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).


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

milling machine patterns and setup

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