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ACME 8mm Rod _does_not_match_ 688Z (8x16x5)

Discussion in 'General Talk' started by mirage335, Sep 6, 2015.

  1. mirage335

    mirage335 Well-Known
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  2. mirage335

    mirage335 Well-Known
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    After thoroughly sanding the inner ring on one of the bearings, it barely fits one of the threaded rods. Yet more unfortunately, that bearing no longer rotates smoothly.
     
  3. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    It is far easier to slightly sand the end of the rod.
     
  4. Flash22

    Flash22 Veteran
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    You just need to flat off the tops of the thread by sticking it in a drill and holding some emery/abrasive to the end

    as per the v-slot actuator (link starts around the time for the lead screw)

     
  5. mirage335

    mirage335 Well-Known
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    Wow. Sanding the threaded rod. Had not thought that would be standard procedure, kind of frightening!
     
  6. Flash22

    Flash22 Veteran
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    Your only doing the very end and your not taking much more than 0.1mm off the thread - if you do it in stages you can get a very tight engineering fit, tbh there is less tolerance it the bearing and thrust washer than the screw in to the bearing
     
  7. mirage335

    mirage335 Well-Known
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    Indeed. Works perfectly. Thanks everyone!

    Now, just need to clean off the loose grit.
     

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