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  • Users: KevinZ7
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  1. KevinZ7

    Surface Roughness - Guidelines

    Greetings, I deal with sealing against low pressure (<500psi) water using elastomeric seals, turned, milled and molded parts. I have found lots of literature detailing different ways of specifying surface finishes (Ra, Rp, Rz, Rv, Rt etc etc). However, I have found very little information...
  2. KevinZ7

    O-Ring across a parting line - plastic molded part

    I have seen a number of plastic molded parts that feature a parting line crossing a radial o-ring groove and that are intended to seal against at least 100's of psi. Does anyone have any experience specifying plastic molded parts with features like these? How do you specify the size of the...
  3. KevinZ7

    Ulta Low Viscosity Encapsulants for Electronics

    I have electronics that need to be potted with a very low durometer, water clear compound. It needs to be potted bubble free for aesthetic reasons, flow through and around some very fine features, and be a gel rather than a rubber to prevent de-lamination (separating with the wall of a clear...
  4. KevinZ7

    What Mill (CNC or otherwise) would you buy for no more than $10k?

    The mill would be solely for prototyping designs, and we would get value out of CNC capability as it would allow us to prototype complex shapes. That is of course unless the premium that you pay for CNC makes it not worth it. Primarily would be machining plastics, however the ability to drill...

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