// multi-utility computation suite · offline · instant · precise
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sci.CNC-cutting-speed-feeds Calculator
Calculates spindle speed n = 1000v_c/(πD), feed rate, material removal rate MRR, and cutting force for CNC turning or milling operations. Cutting speed for HSS on steel: 20–50 m/min; carbide: 100–300 m/min — MRR = depth × width × feed, directly proportional to machining time.
Inputs
V C Mmin
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
D Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
F Mm Rev
Reference formula or conversion factor shown for context.
Ap Mm
Vertical extent downward, or thickness of a layer. For tanks: affects pressure at the base (P = ρgh).
Ae Mm
Vertical extent downward, or thickness of a layer. For tanks: affects pressure at the base (P = ρgh).
Kc N Mm2
Push or pull (N). F = ma. Net force determines acceleration. Account for all forces including gravity and friction.
Results
spindle speed n (RPM)
The computed rate of movement or processing.
material removal rate MRR (cm³/min)
MRR (monthly recurring revenue) -- total predictable monthly subscription income. MRR x 12 = ARR.
cutting force Fc (N)
Sample size or count used in the calculation.
cutting power Pc (kW)
Sample size or count used in the calculation.
n = 1000·Vc/(π·D) | MRR = Vc·f·ap·ae
MRR (monthly recurring revenue) -- total predictable monthly subscription income. MRR x 12 = ARR.