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Cutting speed, RPM & feed calculator
Work out spindle speed (RPM), cutting speed (Vc / SFM), feed rate, metal removal rate and cycle time for turning, milling and drilling. Type the cutting speed or the RPM – the other one is calculated for you.
Turning inputs
Diameter = workpiece diameter being cut.
Results
Spindle speed–RPM
Feed rate Vf–
Cutting speed–
Metal removal Q–
Cutting time–min
Milling inputs
Diameter = cutter diameter. Teeth = number of flutes or inserts.
Results
Table feed Vf–
Spindle speed–RPM
Cutting speed–
Metal removal Q–
Cutting time–min
Drilling inputs
Diameter = drill diameter.
Results
Spindle speed–RPM
Feed rate Vf–
Cutting speed–
Metal removal Q–
Drilling time–min
Starting cutting speeds for carbide inserts
| ISO group – material | Turning Vc (m/min) | Milling Vc (m/min) | Turning Vc (SFM) |
|---|---|---|---|
| P – Carbon & alloy steel | 150 – 300 | 150 – 280 | 500 – 980 |
| M – Stainless steel | 120 – 220 | 110 – 200 | 390 – 720 |
| K – Cast iron | 150 – 300 | 150 – 300 | 500 – 980 |
| N – Aluminium & non-ferrous | 300 – 1000 | 300 – 1500 | 980 – 3300 |
| S – Heat-resistant alloys & titanium | 30 – 80 | 30 – 70 | 100 – 260 |
| H – Hardened steel (45–65 HRC) | 60 – 150 | 60 – 140 | 200 – 490 |
These are general starting values for coated carbide. Always check the recommendation for the exact grade and chip-breaker, and adjust for machine rigidity, coolant and tool overhang. Send us your job details and we will give you the cutting data for our insert.
Want cutting data for your exact job?
Tell us the material, operation and tool you use now – our applications team replies the same day.