CNC Machining worked example

Tool Wear Cost with machined part quantity in the batch of 1,300 parts: a worked example

What does the result look like when machined part quantity in the batch reaches 1,300 parts? The full calculation is worked below with real intermediate numbers. estimating tooling cost impact for a machined-part quote, production run, or tool-life improvement project

The inputs for this scenario

  • Machined part quantity in the batch: 1,300 parts (raised for this scenario; the documented default is 500)
  • Tool wear cost per part: 1.85 $ / part (unchanged)
  • Fixed setup and tool preset cost: 220 $ (unchanged)
  • Tool crib labor and overhead: 90 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total tool wear cost = machined part quantity × tool wear cost per part + fixed setup tooling cost + tool management labor and overhead) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,715 $ for total tool wear cost, the number this scenario is built around.
  • At this operating point the engine returns 2.09 $ / piece for tool wear cost per part.
  • At this operating point the engine returns 2,405 $ for batch tool wear consumption.
  • At this operating point the engine returns 310 $ for fixed tooling and handling adders.

How this compares with the baseline

  • Against the tool's baseline example, where machined part quantity in the batch sits at 500 parts and the headline result is 1,235 $, this scenario comes in 120% above the baseline at 2,715 $.
  • A figure at this level is achievable when machined part quantity in the batch is genuinely sustained, not just peaked for a shift. The per-part wear figure is an average — actual edge life swings with material hardness, depth of cut, coolant condition, and runout, so a single hard lot can break the estimate.

Results at a glance

  • total tool wear cost: 2,715 $ (headline result)
  • tool wear cost per part: 2.09 $ / piece
  • batch tool wear consumption: 2,405 $
  • fixed tooling and handling adders: 310 $

Run it with your numbers

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

Last reviewed 2026-05-12.