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  • Bearing with detents?

    Discussion in 'The main mechanical design forum' started by josh smithenstien, Jun 9, 2016.

    1. josh smithenstien

      josh smithenstien New Member

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      Hello,

      I have a project which involves a small disc with two pegs attached to it, rotating about the axis of those pegs (see picture for a better explanation of it). The disc will be supported from the two pegs. I would like to have some sort of detent mechanism/ bearing combo, because I want the disc to have 5 or 6 definite positions. Does anyone know of anything off-the-shelf that might work for this? Super grateful for any help!
       

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    3. s.weinberg

      s.weinberg Well-Known Member

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      First thing that comes to mind are multi-position torque limiters. The ones here: http://www.diequa.com/download/rw/rw_sk_catalog.pdf have a standard re-engagement at 60 degrees. If you fix them at one end, and attach the other to your disc, you would exceed the torque limit to change positions, and release torque to lock into one of your 6 positions.
       
    4. Erich

      Erich Well-Known Member

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      I would use a ball detent. http://www.mcmaster.com/#ball-detents/=12svkvc
      You will need to drill a hole in the periphery of the shaft in 5 or 6 places. Just the angled tip of the drill is enough.
      Put the ball detent in the housing where it can engage the shaft.
       
    5. Break_BoY

      Break_BoY New Member

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      Good idea.
      You have to calculate fix (spring, dimensions of hole). Because when wheel rotate, it has torque.
       

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