Grain Milling, Dry Bulk Food & Feed Handling worked example

Mill Throughput at 99% mill operating efficiency: a worked example

This scenario runs the mill throughput calculation on the strong side: 99% mill operating efficiency, with every other input held at its documented default. Use it when a mill operator or production manager needs to check whether a hammer mill, roller mill, grinder, or milling line can support the planned tons per hour for the shift.

The inputs for this scenario

  • Finished milled output: 120 tons (unchanged)
  • Productive mill runtime: 8 hr (unchanged)
  • Mill operating efficiency: 99 % (raised for this scenario; the documented default is 88)

Working through the calculation

  • Applying the documented formula (Raw mill throughput = finished milled output รท productive mill runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 14.85 tons / hr for effective throughput, the number this scenario is built around.
  • At this operating point the engine returns 15 tons / hr for raw mill throughput.
  • At this operating point the engine returns 99 % for efficiency.
  • At this operating point the engine returns 8 hr for runtime.

How this compares with the baseline

  • Against the tool's baseline example, where mill operating efficiency sits at 88% and the headline result is 13.2 tons / hr, this scenario comes in 12.5% above the baseline at 14.85 tons / hr.
  • Use it when validating a production schedule, benchmarking one milling line against another, or quantifying the gap between nameplate and real-world capacity. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Effective throughput: 14.85 tons / hr (headline result)
  • Raw mill throughput: 15 tons / hr
  • Efficiency: 99 %
  • Runtime: 8 hr

Run it with your numbers

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

Last reviewed 2026-05-12.