Sheet Metal Stamping & Press Lines worked example

Press Tonnage at 65% line efficiency: a worked example

This worked example runs the press tonnage numbers for a tougher week than the baseline: 65% line efficiency instead of the typical 90%. Despite the name, this tool measures the effective hit-rate throughput of a stamping press line, not ram force.

The inputs for this scenario

  • Parts completed this shift: 1,200 units (held at the documented default)
  • Press run time: 8 hr (held at the documented default)
  • Line efficiency (OEE-style): 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw press tonnage = completed output รท runtime.
  • Effective throughput works out to 97.5 units at these inputs, and this is the headline figure for the scenario.
  • Raw throughput works out to 150 units at these inputs.
  • Efficiency works out to 65 % at these inputs.
  • Runtime works out to 8 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where line efficiency sits at 90% and the headline result is 135 units, this scenario comes in 27.78% below the baseline at 97.5 units.
  • Use it when validating a stamping quote, scheduling a shift, or reconciling counter reads against a press's theoretical strokes per minute. 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

  • Effective throughput: 97.5 units (headline result)
  • Raw throughput: 150 units
  • Efficiency: 65 %
  • Runtime: 8 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Press Tonnage calculator, set line efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.