Gaskets, Seals, O-Rings & Elastomer Components worked example

Durometer Tolerance with measured durometer of 180 Shore A: a worked example

This scenario runs the durometer tolerance calculation on the strong side: measured durometer of 180 Shore A, with every other input held at its documented default. Use it when quality, incoming inspection, or production needs a quick Shore A durometer pass/fail check for rubber sheets, molded seals, O-rings, gaskets, or custom elastomer parts.

The inputs for this scenario

  • Measured durometer: 180 Shore A (raised for this scenario; the documented default is 70)
  • Lower durometer limit: 65 Shore A (unchanged)
  • Upper durometer limit: 75 Shore A (unchanged)

Working through the calculation

  • Applying the documented formula (Durometer status = measured durometer checked against lower and upper durometer limits) to the inputs above produces each figure below.
  • At this operating point the engine returns 0 outside for inside window, the number this scenario is built around.
  • At this operating point the engine returns -105 value for nearest margin.
  • At this operating point the engine returns 65 value for lower durometer limit.
  • At this operating point the engine returns 75 value for upper durometer limit.

How this compares with the baseline

  • Against the tool's baseline example, where measured durometer sits at 70 Shore A and the headline result is 1 inside, this scenario comes in 100% below the baseline at 0 outside.
  • Use it at incoming inspection, first-article, or in-process cure verification to confirm hardness conformance. 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

  • Inside window: 0 outside (headline result)
  • Nearest margin: -105 value
  • Lower durometer limit: 65 value
  • Upper durometer limit: 75 value

Run it with your numbers

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

Last reviewed 2026-05-12.