Bearings, Gears & Power Transmission worked example

Gear Cutting Cycle Time at 21% setup and inspection allowance: a worked example

This scenario runs the gear cutting cycle time calculation on the strong side: 21% setup and inspection allowance, with every other input held at its documented default. a gear shop needs to schedule hobbing, shaping, skiving, or spline cutting work for a defined batch of gear blanks

The inputs for this scenario

  • Gear blanks to cut: 180 gears (unchanged)
  • Verified cutting rate: 24 gears / hr (unchanged)
  • Setup and inspection allowance: 21 % (raised for this scenario; the documented default is 18)

Working through the calculation

  • Applying the documented formula (Base cutting time = gear blanks to cut รท verified cutting rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 9.07 hr for required gear cutting time, the number this scenario is built around.
  • At this operating point the engine returns 7.5 hr for base cutting time.
  • At this operating point the engine returns 21 % for setup and inspection allowance.
  • At this operating point the engine returns 24 gears / hr for verified cutting rate.

How this compares with the baseline

  • Against the tool's baseline example, where setup and inspection allowance sits at 18% and the headline result is 8.85 hr, this scenario comes in 2.54% above the baseline at 9.07 hr.
  • Use it when scheduling a hobbing or gear-shaping job, quoting cutting lead time, or sizing how much spindle time a power-transmission order will consume. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Required gear cutting time: 9.07 hr (headline result)
  • Base cutting time: 7.5 hr
  • Setup and inspection allowance: 21 %
  • Verified cutting rate: 24 gears / hr

Run it with your numbers

  • Every input above is editable in the live Gear Cutting Cycle Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.