Cutting data calculator
Choose turning or milling, then enter tool and material data. Results update as you type.
Choosing a material fills in a reference cutting speed for coated carbide tools. Adjust it to your tool maker's recommendation.
- Spindle speed n
- Feed rate Vf
- Metal removal rate Q
- Estimated cutting power Pc
- Cutting time
- Theoretical roughness Ra
The calculated speed exceeds the machine's maximum. Lower Vc or consider a machine with a faster spindle. Need a better-suited machine? Request a quote
Cutting power exceeds 80% of spindle power. Reduce depth of cut or feed, or consider a more powerful machine. Need a better-suited machine? Request a quote
Choosing a material fills in a reference cutting speed for coated carbide tools. Adjust it to your tool maker's recommendation.
- Spindle speed n
- Feed rate Vf
- Metal removal rate Q
- Estimated cutting power Pc
- Cutting time
The calculated speed exceeds the machine's maximum. Lower Vc or consider a machine with a faster spindle. Need a better-suited machine? Request a quote
Cutting power exceeds 80% of spindle power. Reduce depth of cut or feed, or consider a more powerful machine. Need a better-suited machine? Request a quote
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📘 Free download: CNC machine buyer's guide 2026 (PDF) →- Results are theoretical reference values. Real conditions depend on the tool, machine rigidity, workholding and stock quality.
- Cutting power is estimated from typical specific cutting force kc for each material and excludes drive efficiency.
- When turning across a wide diameter range, use constant surface speed and set a maximum spindle speed limit.
Reference cutting speeds (coated carbide, m/min)
Formula: spindle speed n (rpm) = Vc × 1000 ÷ (π × D). Example Vc 200 m/min, Ø50: n ≈ 1,273 rpm.
| Material | Turning | Milling |
|---|---|---|
| Carbon steel | 200 | 180 |
| Alloy steel | 160 | 150 |
| Stainless steel | 150 | 130 |
| Cast iron | 200 | 180 |
| Aluminum | 400 | 500 |
| Brass | 250 | 250 |