Recommended Parameters for Graphite Machining by End Mills

Suggested Starting Parameters for Endmilling
Graphite

Cutting
Diameter

Machine Speed
(rpm)

Cutting Speed
(sfm)

Feed Rate
(fpt)(in.)

Operation

1/64”

20,000 - 60,000

80 - 245

0.0002 - 0.0005

Finish

1/32”

16,000 - 60,000

130 - 500

0.0005 - 0.001

Finish

3/64”

13,000 - 60,000

160 - 750

0.001 - 0.002

General

0.0005 - 0.001

Finish

1/16”

10,000 - 60,000

160 - 1,000

0.001 - 0.002

General

0.0005 - 0.001

Finish

5/64”

9,000 - 60,000

185 - 1,250

0.001 - 0.002

General

0.0005 - 0.001

Finish

3/32”

8,000 - 60,000

200 - 1,500

0.001 - 0.002

General

0.0005 - 0.001

Finish

1/8”

6,000 - 60,000

200 - 2,000

0.001 - 0.002

General

0.0005 - 0.001

Finish

3/16”

4,000 - 60,000

200 - 3,000

0.001 - 0.002

General

0.0005 - 0.001

Finish

1/4”

3,000 - 50,000

200 - 3,300

0.002 - 0.004

General

0.001 - 0.002

Finish

5/16”

2,500 - 42,000

200 - 3,400

0.002 - 0.004

General

0.001 - 0.002

Finish

3/8”

2,000 - 36,000

200 - 3,500

0.003 - 0.005

General

0.001 - 0.003

Finish

1/2”

1,500 - 30,000

200 - 4,000

0.003 - 0.005

General

0.001 - 0.003

Finish