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Thread: Need some help solving a small design problem

  1. #1
    Associate Engineer
    Join Date
    Oct 2013

    Need some help solving a small design problem

    So it seems pretty basic, but I'd like to get some input/ideas from some other people.

    I have a PVC pole (3.25 OD) in which I'm trying to attach a shelf to the outside. I need something to pass through the pole on the inside, so bolts/screws etc will not work. I've used various types of glue, and they work well, but I'd like to have some sort of physical stop/hold.

    I was wondering if anyone had any suggestions on a way to keep it held up on the outside? I'm looking into using some type of rubber o-ring or rubber band with high enough strength to hold the shelf. I have been unsuccessful finding something on the internet that will work though, so if anyone could direct me it would be much appreciated.

    The shelf is really lightweight, so I think some sort of rubber stop may work well. I just can't seem to find one anywhere.

    Thanks for the help!

  2. #2
    Lead Engineer RWOLFEJR's Avatar
    Join Date
    Mar 2011
    Rochester Pennsylvania
    Hose clamp. (ugly but easy)
    Lock collar. (pretty but little more $$)
    Shallow Groove machined in tube for collar etc. (Better mechanical certainty but machining costs)
    Second tube slid over the tube. (simple... pretty? but added material cost for 4" ? pipe.)

    You might want to look at metal shelving found in a lot of restaurants. Round posts and the shelve accept thin sleeves. I never inspected them to the umpteenth but I expect they have a very slight taper because when swatted into place the inserted sleeve acts like a collet and grips the pole.

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