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  • Plastic Telescoping Pole Fit - Clearances

    Discussion in 'The main mechanical design forum' started by DavidDrehoff, Aug 20, 2015.

    1. DavidDrehoff

      DavidDrehoff New Member

      Aug 2015
      Likes Received:
      Good morning all!

      While this is a very simple question, I've done quite a bit of research and still don't have a warm and fuzzy before starting to shell out $$ on our molds.

      I'm looking to have two large plastic poles slide (telescope) within each other, and lock together using a spring button. My question is, what clearance to design for to have the two poles slide within each other and not bind up, but also not have too much slop while extended.

      It's very important that while extended, it functions as a single long pole.
      Both pole lengths are 24 inches.
      Top PoleBottom PoleClearances (Poles)
      OD:3.25OD:2.985CLR Total:0.015
      ID:3ID:2.735Clr Side:0.0075

      I currently designed for .015 clearance, but am worried this may have too much play between OD/ID.

      Any suggestions? Both poles are to be PVC extruded.


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