CNC Machining worked example

Tool Wear Cost with machined part quantity in the batch of 250 parts: a worked example

Suppose machined part quantity in the batch falls to 250 parts. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate tool wear cost for a batch from part count, tool cost consumed per part, fixed setup tooling cost, and labor or overhead adders.

The inputs for this scenario

  • Machined part quantity in the batch: 250 parts (the input this scenario stresses; the baseline uses 500)
  • Tool wear cost per part: 1.85 $ / part (held at the documented default)
  • Fixed setup and tool preset cost: 220 $ (held at the documented default)
  • Tool crib labor and overhead: 90 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total tool wear cost = machined part quantity × tool wear cost per part + fixed setup tooling cost + tool management labor and overhead.
  • total tool wear cost works out to 773 $ at these inputs, and this is the headline figure for the scenario.
  • tool wear cost per part works out to 3.09 $ / piece at these inputs.
  • batch tool wear consumption works out to 463 $ at these inputs.
  • fixed tooling and handling adders works out to 310 $ at these inputs.

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 37.45% below the baseline at 773 $.
  • It computes the total tooling consumption for a batch by combining a per-part wear cost with fixed setup tooling and crib handling, then back-calculates a fully-loaded cost per part. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • total tool wear cost: 773 $ (headline result)
  • tool wear cost per part: 3.09 $ / piece
  • batch tool wear consumption: 463 $
  • fixed tooling and handling adders: 310 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Tool Wear Cost calculator, set machined part quantity in the batch to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.