Fastener Manufacturing & Thread Rolling worked example

Thread Rolling Cycle Time at 14% rolling allowance for checks and stops: a worked example

Push rolling allowance for checks and stops up to 14% and the picture changes. This example computes every intermediate figure at that operating point. Use it when scheduling flat-die or cylindrical-die thread rolling capacity for screws, bolts, studs, or threaded rods.

The inputs for this scenario

  • Blanks requiring thread rolling: 50,000 pieces (unchanged)
  • Proven thread roller rate: 9,000 pieces / hr (unchanged)
  • Rolling allowance for checks and stops: 14 % (raised for this scenario; the documented default is 12)

Working through the calculation

  • Applying the documented formula (Base thread rolling time = blanks requiring rolling รท proven roller rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 6.33 hr for adjusted thread rolling hours, the number this scenario is built around.
  • At this operating point the engine returns 5.56 hr for base rolling hours.
  • At this operating point the engine returns 14 % for allowance applied.
  • At this operating point the engine returns 9,000 pieces / hr for thread roller rate.

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 1.79% above the baseline at 6.33 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. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Adjusted thread rolling hours: 6.33 hr (headline result)
  • Base rolling hours: 5.56 hr
  • Allowance applied: 14 %
  • Thread roller rate: 9,000 pieces / hr

Run it with your numbers

  • Every input above is editable in the live Thread Rolling Cycle Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.