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Feeds & Speeds Calculator
Starting-point spindle speed, feed rate, and material removal rate for milling. Generic handbook values — verify against your tool maker's data and machine limits.
Parameters
Override defaults (optional)
Results
Spindle Speed
7,640RPM
Feed Rate
122.2IPM
Surface Speed
1000SFM
Chip Load
4.0thou
Material Removal Rate
3.056in³/min
Formulas
RPM = (SFM × 3.82) ÷ Diameter
Feed = RPM × Chip Load × Flutes
MRR = WOC × DOC × Feed Rate
Material Reference
| Material | SFM (Carbide) | SFM (HSS) | Chip Load (IPT) |
|---|---|---|---|
| Aluminum (6061) | 1000 | 300 | 0.004 |
| Aluminum (7075) | 800 | 250 | 0.003 |
| Brass | 600 | 200 | 0.003 |
| Bronze | 400 | 100 | 0.002 |
| Carbon Steel (1018) | 500 | 90 | 0.002 |
| Carbon Steel (1045) | 400 | 80 | 0.002 |
| Stainless Steel (303) | 275 | 65 | 0.0015 |
| Stainless Steel (304) | 250 | 60 | 0.0015 |
| Stainless Steel (316) | 200 | 50 | 0.001 |
| Stainless Steel (17-4 PH) | 175 | 40 | 0.001 |
| Tool Steel (A2) | 200 | 40 | 0.001 |
| Tool Steel (D2) | 150 | 30 | 0.001 |
| Titanium (Grade 2) | 200 | 50 | 0.001 |
| Titanium (6Al-4V) | 150 | 40 | 0.0008 |
| Inconel 625 | 80 | 20 | 0.0006 |
| Inconel 718 | 70 | 15 | 0.0005 |
| Cast Iron (Gray) | 400 | 80 | 0.003 |
| Copper | 600 | 150 | 0.003 |
| Plastics (Acetal/Delrin) | 800 | 300 | 0.005 |
| Plastics (PEEK) | 500 | 200 | 0.004 |
About this tool
Computes spindle RPM, feed rate, and material removal rate from a surface speed and chip load, for a chosen material and cutter.
- Inputs
- Material and tool type
- Tool diameter and flute count
- Surface speed (SFM / m/min) and chip load per tooth
- Depth and width of cut for MRR
- Assumptions
- Rigid setup, sharp tooling, and flood or through-tool coolant where the table implies it
- Chip loads reflect conventional (not high-efficiency or trochoidal) milling
- Table values are conservative catalog starting points, not optimized parameters
- Sources
- Published carbide and HSS tooling catalogs
- Machinery's Handbook speed and feed tables
- Valid range
- Tool diameters 1/32–2 in (1–50 mm); common steels, stainless, aluminum, titanium, plastics.
- Limitations
- Does not account for machine horsepower, torque curve, or spindle-speed limits
- No deflection, chatter, or tool-life modeling
- Exotic alloys and hardened steels above ~45 HRC are not covered
Values are starting points for planning — verify against your tooling and machine documentation before cutting. Report an issue with this tool →