CNC Machining worked example

Bar Stock Yield at 66% target bar-stock yield: a worked example in cnc machining

This worked example runs the bar stock yield numbers for a tougher week than the baseline: 66% target bar-stock yield instead of the typical 92%. Estimate usable bar-stock yield by comparing usable cut parts or usable length with the total bar stock issued to the job.

The inputs for this scenario

  • usable bar stock converted to parts: 920 parts or in (held at the documented default)
  • total bar stock issued: 1,000 parts or in (held at the documented default)
  • target bar-stock yield: 66 % (the input this scenario stresses; the baseline uses 92)

Working through the calculation

  • The calculation starts from the formula this tool documents: Bar-stock yield = usable bar stock converted to parts ÷ total bar stock issued × 100.
  • bar-stock yield works out to 92 % yield at these inputs, and this is the headline figure for the scenario.
  • bar-stock yield gap to target works out to -26 points at these inputs.
  • usable bar stock converted to parts works out to 920 count at these inputs.
  • total bar stock issued works out to 1,000 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target bar-stock yield sits at 92% and the headline result is 92 % yield, this scenario lands almost exactly on the baseline at 92 % yield.
  • Use it when sizing bar length for a new part, reviewing material usage on a running job, or validating a quote's material allowance. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • bar-stock yield: 92 % yield (headline result)
  • bar-stock yield gap to target: -26 points
  • usable bar stock converted to parts: 920 count
  • total bar stock issued: 1,000 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Bar Stock Yield calculator, set target bar-stock yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.