Cutting (Head) Diameter

Suggested RPM

Maximum RPM

1/16"

60,000-90,000

100,000

1/8"

40,000-70,000

90,000

3/16"

35,000-50,000

80,000

1/4"

30,000-50,000

70,000

5/16"

20,000-40,000

68,000

3/8"

20,000-40,000

66,000

7/16"

15,000-40,000

58,000

1/2"

15,000-40,000

50,000

5/8"

12,000-25,000

40,000

3/4"

10,000-20,000

33,000

1"

7,500-20,000

25,000

1-1/8"

7,000-13,000

20,000

1-1/2"

5,000-10,000

17,000

1-3/4"

4,500-9,000

14,000