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  • Users: jekriez
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  1. jekriez

    Weird bearing failure mode

    I've just witnessed a ball bearing failure that I've never seen before. The ball elements failed (not either race). They appeared to crumble. They were split open in two or more pieces each with a brittle looking fracture surface. It was on every ball. This happened at very low life. It is...
  2. jekriez

    To all my Civil Engineering friends! (Specifically those working on roads/bridges)

    Hello, I am a mechanical engineer with a PE licence, and was contacted by a civil engineer friend about a highway proposal their company was putting in that asked for the inclusion of a licenced engineer to handle any mechanical design issues. It was not made clear what this may be, and my...
  3. jekriez

    Material Selection: Clear polymer for site glass

    I have an application where we have seen failures on a site glass due to external material (dirt/rocks) impacts. The site glass is ~1" in diameter and made of Borosilicate. Apparently this is essentially "Pyrex". I would like to move towards another material that is more impact resistent...

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