Speeds & Feeds Pro

Units

Tool material

Work material

Milling

Diameter (in)

Flutes (z)

Cutting speed SFM

Chipload per tooth (in)

Radial engagement ae (WOC) (in)

Axial DOC ap (in)

Spindle RPM limit

Coating / Coolant factor

RPM: —

Feed: — IPM

fz eff: —

MRR: — in³/min

Power: — HP

Torque: — in-lb

Chip-thinning: when ae < 0.5·D, effective f_z is increased by D/(2·ae) (clamped).

Turning (Lathe)

Work diameter (in)

Cutting speed SFM

Feed per rev (IPR / mm/rev)

Depth of cut (radial) (in)

Spindle RPM limit

RPM: —

Feed: — IPM

MRR: — in³/min

Power: — HP

Torque: — in-lb

Approx. turning MRR ≈ 12 × V(sfm) × feed × DOC(radial), power via material energy constants.

Drilling

Drill diameter (in)

Cutting speed SFM

Feed per rev (IPR / mm/rev)

Spindle RPM limit

Heuristic IPR scales with diameter & material; adjust for pecking & setup.

RPM: —

Feed: — IPM

MRR: — in³/min

Power: — HP

Torque: — in-lb

Tapping

Tap diameter (in)

Pitch

Cutting speed SFM

Spindle RPM limit

Feed = pitch × RPM (IPM = RPM/TPI or mm/min = RPM×pitch_mm).

RPM: —

Feed: — IPM

Starting Points (Edit to suit)

These are conservative starts. Adjust for rigidity, stickout, coolant, toolpath (slotting/adaptive), and coating.

Material	Tool	SFM	Vc (m/min)	fz @ Ø½″ (in)	fz @ Ø12.7mm (mm)