Recommended parameters for graphite machining

Graphite machining is very different from traditional metal processing. This post recommends parameters for graphite machining regarding RPM, Feed, and Vc when different cutting tool diameters are used for finish or general machining.

Cutting dia(inch)

Cutting dia(mm)

RPM

sfm

m/min

fpt

Operation

1/64

0.4-0.8

20000-60000

80-245

25-75

0.0002-0.0005

Finish

1/32

0.8-1.5

16000-60000

130-500

40-150

0.0005-0.001

Finish

 

1/16

 

1.5-3.0

 

10000-60000

 

160-1000

 

50-300

0.001-0.002

0.0005-0.001

General

Finish

 

1/8

 

3.0-4.5

 

6000-60000

 

200-2000

 

60-600

0.001-0.002

0.0005-0.001

General

Finish

 

3/16

 

4.5-6.0

 

4000-60000

 

200-3000

 

60-900

0.001-0.002

0.0005-0.001

General

Finish

 

1/4

 

6.0-8.0

 

3000-50000

 

200-3300

 

60-1000

0.002-0.004

0.001-0.002

General

Finish

 

5/16

 

8.0-10.0

 

2500-42000

 

200-3400

 

60-1000

0.002-0.004

0.001-0.002

General

Finish

 

3/8

 

10.0-12.0

 

2000-36000

 

200-3500

 

60-1100

0.003-0.005

0.001-0.003

General

Finish

 

1/2

 

12.0

 

1500-30000

 

200-4000

 

60-1200

0.003-0.005

0.001-0.003

General

Finish

 

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