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rubber testing

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kukku

Mechanical
Mar 13, 2009
1
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.
 
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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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