Fastener Manufacturing & Thread Rolling worked example

Thread Rolling Cycle Time at 8.64% rolling allowance for checks and stops: a worked example

Suppose rolling allowance for checks and stops falls to 8.64%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate thread rolling run time from blanks to roll, proven roller rate, and allowance for checks and minor stops.

The inputs for this scenario

  • Blanks requiring thread rolling: 50,000 pieces (held at the documented default)
  • Proven thread roller rate: 9,000 pieces / hr (held at the documented default)
  • Rolling allowance for checks and stops: 8.64 % (the input this scenario stresses; the baseline uses 12)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base thread rolling time = blanks requiring rolling รท proven roller rate.
  • Adjusted thread rolling hours works out to 6.04 hr at these inputs, and this is the headline figure for the scenario.
  • Base rolling hours works out to 5.56 hr at these inputs.
  • Allowance applied works out to 8.64 % at these inputs.
  • Thread roller rate works out to 9,000 pieces / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where rolling allowance for checks and stops sits at 12% and the headline result is 6.22 hr, this scenario comes in 3% below the baseline at 6.04 hr.
  • It computes adjusted rolling hours by dividing blanks by the proven roller rate, then inflating that base time by an allowance for gauge checks and minor stops. 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

  • Adjusted thread rolling hours: 6.04 hr (headline result)
  • Base rolling hours: 5.56 hr
  • Allowance applied: 8.64 %
  • Thread roller rate: 9,000 pieces / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Thread Rolling Cycle Time calculator, set rolling allowance for checks and stops to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.