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CNC Cycle Time Calculator

Calculate machining cycle times for Turning, Milling, Drilling, Boring & Threading

Formula: N = (1000 × Vc) / (π × D) | Tm = L_eff / (N × f) × passes

Diameter (mm)

Length of Cut (mm)

Feed Rate (f) (mm/rev)

Cutting Speed (Vc) (m/min)

No. of Passes

Approach + Overrun (mm)

Defaults: 2+2 mm

Spindle Speed (N)

— RPM

Effective Length

4.0 mm

Cycle Time

— min

Cycle Time

— sec

Quick Reference — Typical Cutting Speeds (Vc) for Common Materials

Material	Turning (m/min)	Milling (m/min)	Drilling (m/min)	Boring (m/min)
Mild Steel (MS)	80–120	60–100	20–40	80–120
Alloy Steel	60–90	50–80	15–30	60–90
Stainless Steel	40–70	30–60	10–20	40–70
Cast Iron	60–100	50–80	20–35	60–100
Aluminium	200–500	150–400	60–120	200–400
Brass / Bronze	100–200	80–150	40–80	100–200