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rubber testing

rubber testing

rubber testing

(OP)
All the standards talk of testing the hardness (in case of rubber) on test specimens. Is there a way to check the hardness on the very small irregular parts (not specimens)? The requirement is on Shore A scale.

RE: rubber testing

You can test Shore A on irregular objects, but the problem that arises is non-repeatable results.  I've used a hand held durometer, and to measure the hardness I needed a flat surface so the durometer wouldn't "roll" on the sample and give erroneous readings.

If the readings you need are more for your information, an irregular shape should give a close reading.  If you're using the info to report, you should make a flat witness panel from which to get your readings.

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