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  • self centering guides

    Discussion in 'The main mechanical design forum' started by mrpat, Jul 6, 2012.

    1. mrpat

      mrpat New Member

      Feb 2012
      Likes Received:
      I am seeking a design for a set of self centering guides that will allow a slip fit for tubing.

      The tubes measure from approx .022 up to .109.

      At the present time we are using a teflon insert placed into a brass housing.

      The process workes well but it is very labor intensive considering inserting the teflon ( press fit ) and boring the hole dimension.

      I have found some micro lathe chucks, but it seams as if they require a Lock down clamping pressure.

      I am thinking a spring loaded cam action with three cams.

      Any Ideas???
    3. Erich

      Erich Well-Known Member

      Feb 2012
      Likes Received:
      Two V blocks that move in opposite directions.
      Put a gear rack on each block and force them to move in sync with an idler gear.

      Blocks can be closed via a compression spring or by applying torque to the "idler" gear between the racks.

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