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Thread: how to calculate force required for automated retaining ring installation - HELP!!!

  1. #1
    Associate Engineer
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    Nov 2015
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    how to calculate force required for automated retaining ring installation - HELP!!!

    Hi

    I have to calculate press force required for pushing inner retaining ring on tapered (5-10 deg.)
    bushing into the groove.
    This is standard inner retaining ring for 42mm bore. To squeeze it to 42mm 285 N are needed at the plier tips.

    PLEASE HELP!!!

    THANK YOU

  2. #2
    Technical Fellow jboggs's Avatar
    Join Date
    Mar 2011
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    Myrtle Beach, SC
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    908
    Call a retaining ring manufacturer. There are several. Rotorclip is one of the biggest.

  3. #3
    Associate Engineer
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    Nov 2015
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    Thank you,

    I've done it already - not much of help.

  4. #4
    Technical Fellow jboggs's Avatar
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    Mar 2011
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    Myrtle Beach, SC
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    908
    Too many variables. Friction, surface condition, tooling features. Time for some testing.

  5. #5
    Lead Engineer
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    Aug 2013
    Location
    Houston TX USA
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    One principal point of concern when installing these rings in this manner is the hardness of the surface in the taper. C-rings have very sharp and hard edges that can quickly cut into a tapered bore with soft surface when being installed without being otherwise compressed. For applications where an auxliary installation compression adapter is used this is addressed by using a very hard adapter material and/or surface hard coating; but, if the taper is in the mating part, this material selection or taper surface modification is often not appropriate.

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