Identified content errors were corrected on 2026-10-25. Formula and calculation scope: Feed conversion and material-removal relationships follow the linked Sandvik formula reference. On 2026-11-08, independent feed results, explicit units and source-row arithmetic handoffs were added. These checks do not recommend cutting conditions. Full sources, values and limits on this page.
Page last changed 2026-11-08 · based on Public reference accessed 2026-10-25; scope stated on page
Quick Answer
Your results
Feed = feed per tooth × effective tooth count × RPM. Depth and width are needed only for material removal rate.
The Formulas Used
Table feed: F = fz · z · n where fz = feed per tooth, z = number of teeth, n = spindle speed
Material removal rate: MRR = ap · ae · F
Feed per revolution: fr = fz · z
Depth and width are optional for feed conversion. In known-feed mode, MRR = ap × ae × vf; this mode does not infer chip thickness, feed per tooth or RPM. With vf = 900 mm/min, ap = 3 mm and ae = 12 mm, MRR = 32.4 cm³/min.
Choose cutting data before calculating feed
Use cutting data for the complete tool, workpiece material and operation. A heavier engagement may require different feed per tooth, spindle speed, axial depth or radial width. This tool does not decide those settings.
Too little chip thickness can cause rubbing, but this does not justify a universal rule against reducing feed. Check chip thinning, chip evacuation, deflection, vibration and the manufacturer’s permitted range.
Basis and scope
Sandvik Coromant milling formulas: Feed conversion and removal-rate relationships. The calculator does not recommend cutting conditions.
Frequently Asked Questions
- How do I calculate feed rate for milling?
- F = fz × z × n — feed per tooth times the number of teeth times spindle speed. A 4-flute cutter at 0.004 in per tooth and 2,000 RPM gives 32 in/min, or about 813 mm/min.
- Does engagement affect the selected feed?
- Yes, it can affect the suitable feed per tooth and speed. The conversion F = fz × z × n is unchanged; the inputs must be chosen for the actual engagement.
- Does this tool calculate chip thinning?
- No. Chip thinning depends on cutter geometry and engagement; use the applicable manufacturer calculation before entering fz.
- How do I convert feed rate to mm/min?
- Multiply by 25.4. A feed of 32 in/min is 813 mm/min. In metric practice the feed per tooth is given in mm and the arithmetic is the same.
- Which inputs are included?
- Use feed per tooth, effective tooth count and RPM, or enter a known table feed. Axial depth and radial width are required only for material removal rate. Choose millimetres or inches explicitly; this tool does not calculate chip thinning.
Related
Value Sources
References and calculation methods used for this page are listed below. Numbered markers connect table columns where present. A reference listing does not itself establish that every value has been independently checked.
| # | Source | Type | Revision / method |
|---|---|---|---|
| [1] | Sandvik Coromant milling formulas | reference | Public reference accessed 2026-10-25 — source |
Data Sources
| Standard | Revision | What it covers on this page |
|---|---|---|
| Sandvik Coromant milling formulas | Public reference accessed 2026-10-25; scope stated on page | Feed conversion and removal-rate relationships. The calculator does not recommend cutting conditions. |
Verification scope
- 2026-10-25 — Content corrected 2026-10-25. Feed conversion and removal-rate relationships. The calculator does not recommend cutting conditions. Evidence
Content corrected 2026-10-25. Feed conversion and removal-rate relationships. The calculator does not recommend cutting conditions.
Cite This Page
Read the source notes, calculation methods and verification scope above before reusing a value. To cite this page: