Welding & Fabrication worked example

Bend Deduction with outside-mold-line span of 15 in: a worked example

This scenario runs the bend deduction calculation on the strong side: outside-mold-line span of 15 in, with every other input held at its documented default. Use it to convert outside-mold-line dimensions on a sheet metal print into a developed flat length for the blank.

The inputs for this scenario

  • Outside-mold-line span (both legs): 15 in (raised for this scenario; the documented default is 6)
  • First outside setback: 0.09 in (unchanged)
  • Second outside setback: 0.09 in (unchanged)
  • Bend allowance to net out: 0.16 in (unchanged)

Working through the calculation

  • Applying the documented formula (Sum of bend deductions = first outside setback + second outside setback + bend allowance to net out) to the inputs above produces each figure below.
  • At this operating point the engine returns 14.68 in for developed flat length, the number this scenario is built around.
  • At this operating point the engine returns 0.33 value for sum of bend deductions.
  • At this operating point the engine returns 15 value for outside-mold-line span (both legs).
  • At this operating point the engine returns 97.83 % for utilization.

How this compares with the baseline

  • Against the tool's baseline example, where outside-mold-line span sits at 6 in and the headline result is 5.68 in, this scenario comes in 159% above the baseline at 14.68 in.
  • Use it when developing a flat blank for a bent part before laser or turret cutting, and when checking a CAD unfold against a shop-proven setback chart. 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

  • Developed flat length: 14.68 in (headline result)
  • Sum of bend deductions: 0.33 value
  • Outside-mold-line span (both legs): 15 value
  • Utilization: 97.83 %

Run it with your numbers

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

Last reviewed 2026-05-12.