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Thread: Looking for a rotary joint, no idea what its called :)

  1. #11
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    Dec 2006
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    Rugby, Warwickshire, England
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    The Hardinge lathes use a ball bearing with the inner attached to the collet drawbar and the outer attached via a swiveling yoke to the collet closing handle. No names to help with the search, but an idea for if you have to make one.

  2. #12
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    Dec 2016
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    Helsinki, Finland, Europe
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    So you are looking for thrust bearing?

    I'm not aware of "plug and play" bidirectional (push-pull) thrust bearing "blocks" or modules but maybe someone is better at google-fu.

    How much axial loose play you can tolerate and how well the shafts are aligned with each other?
    Max force?

    You can use ordinary flange bearing if the axial loads are moderate and some small amount of axial play is ok.


  3. #13
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    Jan 2005
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    Buffalo NY
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  4. #14
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    Jun 2005
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    Almost Dallas
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    Perhaps you can use some variation of a "Hoist Ring."

    https://www.mcmaster.com/#hoist-rings/=1d9l5xs

  5. #15
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    Some automotive wheel hub bearings could be also applicable if you need more beefy unit. They come in variety mounting options like these:

  6. #16
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    Dec 2010
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    Southeast Michigan
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    Consider a variation on the "gearbox type fork" with a deep well socket. The square end could engage a square shaft, the hex end could engage a hex shaft. Slide the deep well socket "forward" to engage, slide it "backward" to disengage.

  7. #17
    Join Date
    Aug 2007
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    Hertfordshire, England
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    LOL, nice stuff coming there

    The shafts are small - rotating is 14mm and pneumatic cylinder is 10mm with a 6mm female thread

    Forces are low so a construction with a ball race will work admirably i think, it would have less slack than a fork/slot setup too.


  8. #18
    Join Date
    Oct 2013
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    Setubal, Portugal
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    KISS



    instead of lever, pneumatic actuator
    Helder Ferreira
    Setúbal, Portugal

  9. #19
    Join Date
    Oct 2002
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    Saskatoon, Saskatchewan
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    2,640

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    Quote Originally Posted by Davek0974 View Post
    LOL, nice stuff coming there

    The shafts are small - rotating is 14mm and pneumatic cylinder is 10mm with a 6mm female thread

    Forces are low so a construction with a ball race will work admirably i think, it would have less slack than a fork/slot setup too.

    Thanks for the details. It really allows suggestions to be more suitable to your needs.
    Last edited by Arcane; 06-13-2018 at 09:24 AM.

  10. #20
    Join Date
    Aug 2007
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    Hertfordshire, England
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    Quote Originally Posted by Davek0974 View Post
    LOL, nice stuff coming there

    The shafts are small - rotating is 14mm and pneumatic cylinder is 10mm with a 6mm female thread

    Forces are low so a construction with a ball race will work admirably i think, it would have less slack than a fork/slot setup too.

    Its all there

    The cylinder can be axial to the shaft or parallel or anything really, its all open at present stage.

    Force is low, its a type of power-drawbar for a mill, using a sliding shaft to couple a socket onto the drawbar, so once coupled the lateral force is zero, sliding forces are also low, only real force would be if the dogs do not align and then snap into position after rotation starts - this will be whatever pressure the cylinder is set to but will in any case be low.

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