Should setup be included in the cutting rate?

Only include setup in one place. If the rate is pure cutting time, use the allowance field for setup and inspection.

Can this be used for splines or sprockets?

Yes, if the completion rate is measured in finished pieces per hour for the same process.

What if tooth count varies by part?

Run separate scenarios for materially different tooth counts, modules, face widths, or cutting methods.

How can I use the result?

Use the required hours to reserve machines, set delivery commitments, and estimate labor or machine cost.

Bearings, Gears & Power Transmission calculator

Gear Cutting Cycle Time Calculator

Gear cutting cycle time affects machine loading, delivery dates, and cost for gears, pinions, sprockets, and reducer components. This calculator helps planners and manufacturing engineers translate part count and proven cutting rate into the hours needed for a production order.

What this calculator does

Estimate total gear cutting hours from gear blanks, demonstrated cutting rate, and setup or inspection allowance for hobbing, shaping, or skiving work.
a gear shop needs to schedule hobbing, shaping, skiving, or spline cutting work for a defined batch of gear blanks
Returns estimated machine or labor hours required to cut the specified gear batch.

Formula used

Base cutting time = gear blanks to cut ÷ verified cutting rate
Required gear cutting time = base cutting time × setup and inspection allowance factor

Inputs explained

Gear blanks to cut: Use the number of gears, pinions, sprockets, or splined parts in the work order.
Verified cutting rate: Use a recent hobbing, shaping, skiving, broaching, or spline cutting rate for the same material and tooth geometry.
Setup and inspection allowance: Add time for changeover, cutter setting, first-piece inspection, deburr checks, and tool wear adjustments.

How to use the result

Use it for machine loading, quoting, capacity checks, and comparing cutter, fixture, or process alternatives.
It is an estimate unless the rate matches the same module or diametral pitch, face width, material, hardness, tooth count, and machine setup.

Common questions

Should setup be included in the cutting rate? Only include setup in one place. If the rate is pure cutting time, use the allowance field for setup and inspection.
Can this be used for splines or sprockets? Yes, if the completion rate is measured in finished pieces per hour for the same process.
What if tooth count varies by part? Run separate scenarios for materially different tooth counts, modules, face widths, or cutting methods.
How can I use the result? Use the required hours to reserve machines, set delivery commitments, and estimate labor or machine cost.

Last reviewed 2026-05-12.