Machining Time Calculator

Inputs

Feed model

Choose how the feed rate should be calculated.

Cutting length (L)

Length actually cut at feed, before approach and overtravel.

Approach allowance (La)

Lead-in or approach distance that runs at feed.

Overtravel allowance (Lo)

Lead-out or extra travel beyond the cut that runs at feed.

Passes (P)

Number of identical feed passes per part.

passes

Spindle speed (n)

Spindle speed used to derive feed rate.

rpm

Flutes (Z)

Number of effective cutting teeth for milling feed.

flutes

Chip load (fz)

Feed per tooth for milling.

Non-cut time per part

Rapids, tool changes, clamp/unclamp, probing, dwell or handling time per part.

min

Batch quantity (N)

Good parts in the run for total batch time.

parts

Default result

Cycle time each

0.7333min

Also computed

Cutting feed time each0.2333min

Time per pass0.1167min

Batch cycle time18.33min

Feed rate used(Vf)1,920mm/min

Feed distance per pass224mm

Feed distance each448mm

Method notes 4 notes

Feed rate is Vf = RPM × flutes × chip load.
Feed distance per pass = cutting length + approach allowance + overtravel allowance.
Cutting feed time = feed distance ÷ feed rate × passes. Cycle time adds the entered non-cut allowance.
Use this as planning time. Real CNC cycle time changes with acceleration, rapids, pecks, tool changes, probing, dwell and controller look-ahead.