buncha.tools
buncha/engineering/feedsspeeds

CNC Feeds & Speeds

Material
Tool
Operation
Spindle
6,112
RPM
Feed
146.7
IPM
Surface speed
800 SFM
Chip load (IPT)
0.0080
MRR
3.67 in³/min
Use as a starting point. These are conservative reference values — a stiff machine on solid workholding can push 1.5–2× harder. Watch for chatter, listen for a steady hum, and check chip colour. Bluing in steel = too hot, slow down.

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About CNC Feeds & Speeds

RPM + IPM calculator for milling, drilling, and turning across 8 common materials.

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