CNC Turning Machine Power Calculator

Pc (kW) = (ap × f × vc × Kc) / (60 × 1000 × n)

Depth of Cut (ap):

Feed per Revolution (f):

mm/rev

Cutting Speed (vc):

m/min

Specific Cutting Force (Kc):

MPa

Machine Coefficient (n):

Actual Cutting Power (Pc): 0 kW

For turning steel: ap = 2 mm, f = 0.3 mm/rev, vc = 200 m/min, Kc = 2000 MPa, n = 0.8

Result: Pc = 5 kW

Click "Load Example" to try it!

Work Material	Tensile Strength(MPa) and Hardness	Specific Cutting Force Kc(MPa)
Work Material	Tensile Strength(MPa) and Hardness	0.1 (mm/rev)	0.2 (mm/rev)	0.3 (mm/rev)	0.4 (mm/rev)	0.6 (mm/rev)
Mild Steel	520	3610	3100	2720	2500	2280
Medium Steel	620	3080	2700	2570	2450	2300
Hard Steel	720	4050	3600	3250	2950	2640
Tool Steel	670	3040	2800	2630	2500	2400
Tool Steel	770	3150	2850	2620	2450	2340
Chrome Manganese Steel	770	3830	3250	2900	2650	2400
Chrome Manganese Steel	630	4510	3900	3240	2900	2630
Chrome Molybdenum Steel	730	4500	3900	3400	3150	2850
Chrome Molybdenum Steel	600	3610	3200	2880	2700	2500
Nickel Chrome Molybdenum Steel	900	3070	2650	2350	2200	1980
Nickel Chrome Molybdenum Steel	352HB	3310	2900	2580	2400	2200
Hard Cast Iron	46HRC	3190	2800	2600	2450	2270
Meehanite Cast Iron	360	2300	1930	1730	1600	1450
Grey Cast Iron	200HB	2110	1800	1600	1400	1330