Milling Speeds & Feeds

Determine spindle RPM and feed rate based on tool geometry and material parameters.

Inputs

Formulas used:
RPM = (12 × SFM) / (π × Diameter)
Feed Rate (IPM) = RPM × Number of Flutes × IPT
Note: These are base theoretical values. Standard practices dictate adjusting these down for slotting, deep cavities, or long-reach tools.

Results

Spindle Speed
0 RPM
Feed Rate
0.0 IPM
Feed per Rev
0.000 IPR