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Machining & Fasteners Calc – Spindle RPM / Surface Speed
x402
Machining & Fasteners Calc – Spindle RPM / Surface Speed is a paid API for AI agents from machining-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Converts between spindle RPM and surface speed (SFM or m/min) for a given cutter or workpiece diameter.
Price / call$0.02
Success—
StatusUnknown
How this service works
Spindle rpm for a diameter at a surface speed (SFM or m/min), or the surface speed an rpm gives.
Output
Returns the computed spindle RPM (when surface speed is provided) or the surface speed (when RPM is provided), along with the input diameter, units, and a plain-English summary. May include a disclaimer or data-quality notes.
Example use cases
CNC milling RPM from surface speed
“I'm milling aluminum with a 12 mm carbide end mill at a recommended surface speed of 200 m/min — what spindle RPM should I set on my CNC, using metric units?”
Lathe turning speed check
“I'm turning a 3-inch diameter steel bar on my lathe at 1500 RPM — what surface speed in SFM am I actually cutting at?”
Drill press speed for HSS drill
“I need to drill mild steel with a 3/8-inch HSS twist drill at 80 SFM. What RPM should I set my drill press to, in imperial?”
Technical details
Endpoint
GEThttps://machining-calc.x402tookit.com/speed-rpm?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, paid-per-call calculation of spindle RPM from surface speed (SFM or m/min), or the reverse, for a known cutter or workpiece diameter. It is purpose-built for machining contexts and supports both imperial and metric units, making it ideal for CNC programming, manual lathe/mill setup, or automated toolpath validation workflows.
Side effects
- Missing required diameter parameter returns an error
- Neither surfaceSpeed nor rpm provided — endpoint requires exactly one of these
- Invalid unit string (not 'imperial' or 'metric') may cause unexpected results
- Extremely large or small values may produce physically unreasonable outputs without explicit validation warnings
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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