Rubber, Tires, Foam & Elastomer Manufacturing worked example

Rubber Hardness Variation with highest durometer reading of 20 value: a worked example

This scenario runs the rubber hardness variation calculation on the strong side: highest durometer reading of 20 value, with every other input held at its documented default. Use it when rubber hardness variation in rubber, tires, foam and elastomer manufacturing is being audited or compared against a control chart.

The inputs for this scenario

  • Highest durometer reading: 20 value (raised for this scenario; the documented default is 8)
  • Lowest durometer reading: 12 value (unchanged)
  • Nominal durometer target (Shore A): 10 value (unchanged)

Working through the calculation

  • Applying the documented formula (Rubber hardness variation range = highest rubber hardness variation reading - lowest rubber hardness variation reading) to the inputs above produces each figure below.
  • At this operating point the engine returns 0 % for rubber hardness variation variation, the number this scenario is built around.
  • At this operating point the engine returns 0 value for spread.
  • At this operating point the engine returns 20 value for minimum.
  • At this operating point the engine returns 12 value for maximum.

How this compares with the baseline

  • Against the tool's baseline example, where highest durometer reading sits at 8 value and the headline result is 40 %, this scenario comes in 100% below the baseline at 0 %.
  • Use it during incoming compound checks, batch release, or when investigating durometer complaints from the field. 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

  • Rubber hardness variation variation: 0 % (headline result)
  • Spread: 0 value
  • Minimum: 20 value
  • Maximum: 12 value

Run it with your numbers

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

Last reviewed 2026-05-12.