Foundry & Forging worked example

Die Life Estimator at 61% usable die-life efficiency: a worked example in foundry & forging

Suppose usable die-life efficiency falls to 61%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate how many forging or die-casting dies, inserts, cavities, or refurbishments are needed for planned production.

The inputs for this scenario

  • Planned die shots or forgings: 25,000 parts (held at the documented default)
  • Die wear per part: 0 die life units / part (held at the documented default)
  • Usable die-life efficiency: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Theoretical die life estimator requirement = planned die shots or forgings × die wear consumed per part.
  • Required die life estimator quantity works out to 2.05 units at these inputs, and this is the headline figure for the scenario.
  • Theoretical die life estimator requirement works out to 1.25 units at these inputs.
  • Die Life Estimator loss allowance works out to 0.8 units at these inputs.
  • Usable die-life efficiency works out to 61 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where usable die-life efficiency sits at 85% and the headline result is 1.47 units, this scenario comes in 39.34% above the baseline at 2.05 units.
  • It computes the die-life units a run consumes by multiplying parts by wear per part, then dividing by usable efficiency to get the capacity actually required. 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

  • Required die life estimator quantity: 2.05 units (headline result)
  • Theoretical die life estimator requirement: 1.25 units
  • Die Life Estimator loss allowance: 0.8 units
  • Usable die-life efficiency: 61 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Die Life Estimator calculator, set usable die-life efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.