Crown Diamond Processing Parameters

Materials

Grouping

Workpiece material

Cutting speed Vc
m/min

Drill bit diameter

12:00 PM - 6:00 PM

18.01–25.00

25.01–32.00

32.01–36.00

36.01–43.00

Feed rate f (mm/rev)

P

1

Non-alloy steel

50–120

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

2

Low-alloy steel

50-110

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

3

High-alloy steel

50–120

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

4

Ferritic and martensitic stainless steels

50–120

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

K

1

Malleable cast iron

60-110

0.05–0.15

0.05–0.15

0.08–0.20

0.08–0.20

0.08–0.20

2

Gray cast iron

60-110

0.05–0.15

0.05–0.15

0.08–0.20

0.08–0.20

0.08–0.20

3

Ductile cast iron

60-130

0.05–0.15

0.05–0.15

0.08–0.20

0.08–0.20

0.08–0.20

M

1

Austenitic stainless steel

40-110

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

2

Super-austenitic (nickel ≥20%) stainless steel

40-110

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

3

Duplex (Austenitic/Ferritic) Stainless Steel

40-110

0.05–0.15

0.05–0.15

0.08–0.25

0.08–0.25

0.08–0.25

S

1

Iron-based alloy

20–65

0.05–0.15

0.05–0.15

0.08–0.18

0.08–0.18

0.08–0.18

2

Nickel-based alloy

20-66

0.05–0.15

0.05–0.15

0.08–0.18

0.08–0.18

0.08–0.18

3

Drill base alloy

20–65

0.05–0.15

0.05–0.15

0.08–0.18

0.08–0.18

0.08–0.18

4

Titanium alloy

30-60

0.05–0.15

0.05–0.15

0.08–0.18

0.08–0.18

0.08–0.18