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  1. Hiker79

    Plastic Knobs Cracking

    Hi, I have a molded plastic knob whose application is on the end of an encoder. I see about 10% come back from the field with the hollow shaft (it's a D-shaft with a D-ring) having a crack in it. How do I determine if the knob shaft has a thick enough wall to contain the hoop stress? Thanks!

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