Bearings, Gears & Power Transmission worked example

Precision Grinding Cost at 92% parts requiring precision grinding: a worked example

What does the result look like when parts requiring precision grinding reaches 92%? The full calculation is worked below with real intermediate numbers. a shop needs to quote or compare the cost of precision grinding for rotating equipment components

The inputs for this scenario

  • Components in grinding scope: 950 parts (unchanged)
  • Precision grinding cost per part: 7.25 $ / part (unchanged)
  • Parts requiring precision grinding: 92 % (raised for this scenario; the documented default is 80)
  • Fixed grinding setup and inspection cost: 1,100 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable precision grinding cost = grinding scope components × grinding cost per part × parts requiring precision grinding share) to the inputs above produces each figure below.
  • At this operating point the engine returns 7,437 $ for total precision grinding cost, the number this scenario is built around.
  • At this operating point the engine returns 7.83 $ / part for grinding cost per part.
  • At this operating point the engine returns 6,337 $ for variable precision grinding cost.
  • At this operating point the engine returns 1,100 $ for fixed grinding setup and inspection cost.

How this compares with the baseline

  • Against the tool's baseline example, where parts requiring precision grinding sits at 80% and the headline result is 6,610 $, this scenario comes in 12.5% above the baseline at 7,437 $.
  • A figure at this level is achievable when parts requiring precision grinding is genuinely sustained, not just peaked for a shift. It assumes a single blended per-part rate, so jobs mixing rough and fine grinds or different tolerance bands will need separate runs to stay accurate.

Results at a glance

  • Total precision grinding cost: 7,437 $ (headline result)
  • Grinding cost per part: 7.83 $ / part
  • Variable precision grinding cost: 6,337 $
  • Fixed grinding setup and inspection cost: 1,100 $

Run it with your numbers

  • Every input above is editable in the live Precision Grinding Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.