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  1. innominata

    Smallest O Ring Cross Section for Face Seals - Parker O Ring Handbook

    I noticed what the issue must be. The two o-rings actually had a different material. I compared a handful of o-rings I had and the FKM material is somewhat set in place, that is the shape tends to have no memory while the nitrile o-rings love to return to their O shape. edit: Actually the...
  2. innominata

    Smallest O Ring Cross Section for Face Seals - Parker O Ring Handbook

    On page 98 of the Parker Handbook, section 4-18, there are listed cross sections for o-rings and groove dimensions. The smallest cross section listed is 1.78mm, the handbook doesn't list any smaller. I tried 1.78mm and made and tested a working seal. I wanted to decrease the wall thickness of...
  3. innominata

    Incorporating a LED indicator into a Plastic Enclosure with Injection Molding

    I want to have an indicator. I assume with frosting you can have it apply only to the external surface.
  4. innominata

    Incorporating a LED indicator into a Plastic Enclosure with Injection Molding

    What textures typically work well for the exit surface if you're using polycarbonate?
  5. innominata

    Face Seal Fastener Placement and Spacing

    Thanks Tugboat, So fundamentally I need to find the force requirement for the material and find some fastener configuration that distributes the forces over the length of the o-ring correctly. Ty
  6. innominata

    Face Seal Fastener Placement and Spacing

    How much does it matter where the fasteners are placed on an o-ring face seal? Park O Ring handbook doesn't say anything about it. I'm currently using a racetrack groove. I've made the radius of the groove curvature 3x the diameter of the o-ring but I worry about where I've placed the screw...
  7. innominata

    Incorporating a LED indicator into a Plastic Enclosure with Injection Molding

    Quite often I see plastic enclosures with light indicators that I assume are waterproof but are not removable or fitted, rather bonded to the surrounding plastic. Looking at the indicator you can see that it's often a light pipe. How exactly is this achieved, is it overmolding and are there any...

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