Chip load is the thickness each flute removes per revolution. Rearrange the feed rate formula to check whether your program is cutting a real chip or just rubbing.
Chip load = Feed (IPM) / (RPM × flutes)
What the variables mean
| Symbol | Meaning |
|---|---|
| Chip load | Feed per tooth (inches) |
| IPM | Feed rate (inches per minute) |
| RPM | Spindle speed |
| Flutes | Number of cutting edges |
Worked example
30 IPM at 2,292 RPM with 4 flutes: chip load = 30 / (2292 × 4) = 0.0033 in per tooth.
Skip the arithmetic with the Chip Load Calculator in Feeds & Speeds.