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Thread: How to weld delrin gear

  1. #1
    Join Date
    Oct 2004
    Posts
    172

    Default How to weld delrin gear

    One of my neighbor bring me a small nylon or delrin gear. 2 parralel spirals .

    (.850dia .230bore .305 face)
    The gear had a crack from center to outside. What is the best method to glue it to the shaft.
    I can drill a hole to pin it in place. I suspect the torque will split it whitout glue.

  2. #2
    Join Date
    Jan 2006
    Location
    Indianapolis
    Posts
    166

    Default

    My experience with delrin or acetal and glue has been - it does not glue easily or well. YMMV
    Gary

  3. #3
    Join Date
    Dec 2011
    Location
    gulfport ms
    Posts
    31

    Default

    Delrin is nearly impossible to glue with any success. It is self lubricating and quite slippery to the touch. I have been making delrin bits for my scuba stuff for a while now, and from my research there is no easy way to glue it. I did see a thing on youtube where a guy had limited success. He used some type of etching acid, heated the delrin with a torch, then glued it up. Not sure what kind of forces on what he was doing but I'd guess for a gear they are pretty significant.

    Take a peek on youtube for "gluing delrin" and you should find it.

    FD

  4. #4
    Join Date
    Aug 2009
    Location
    Canada, Bc
    Posts
    7,339

    Default

    I think you would be better off drilling and taping it, if you can... Maybe drill and tap a 'side' plate on?

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