Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 31

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

  1. #21
    Join Date
    Aug 2007
    Location
    Hertfordshire, England
    Posts
    1,356

    Default

    Quote Originally Posted by Noitoen View Post
    KISS



    instead of lever, pneumatic actuator
    Yes that sort thing will work, needs to be push-pull not just push.

  2. #22
    Join Date
    Dec 2016
    Location
    Helsinki, Finland, Europe
    Posts
    2,056

  3. #23
    Join Date
    Jun 2007
    Location
    Anderson SC
    Posts
    983

    Default

    Well, considering the small size, and low forces.... what about just a oilite bronze bushing, or nylon, or teflon, or..... you get the idea.

  4. #24
    Join Date
    Apr 2017
    Location
    Poway CA
    Posts
    145

    Default

    that's what that does. The long drawbar going to the right rotates with the lathe spindle. That is your shaft.
    Ignore the bright cylinder.
    The dark cylinder with a rivet or bolt on top has a bearing with the inner race attached to the shaft.
    The aforementioned rivet is actually a pivot point so the L shaped piece with the big handle can pivot with respect to the shaft.
    That handle assy rotates around the hole at the back of the L shaped piece. This gives mechanical advantage to clamp collets.
    You could mount a cylinder parallel to your shaft and push pull the handle.
    OR you make a u shaped clevis that attaches to the pivot points on the dark cylinder and attach the cylinder in line out to the left to push pull.

  5. #25
    Join Date
    Jan 2010
    Location
    Kansas City area
    Posts
    5,381

    Default

    You may want to study how Bridgeport style power drawbars are made with an air impact wrench.

  6. #26
    Join Date
    Apr 2017
    Location
    Kelowna BC
    Posts
    994

    Default

    Harley used a small thrust bearing that fit on a 3/8 shaft, but it ran in oil. With a spring on the far end to retract it.
    How much stroke do you need ?
    Last edited by 754; 06-13-2018 at 12:12 PM.

  7. #27
    Join Date
    Sep 2011
    Location
    Langley, British Columbia
    Posts
    1,023

    Default

    PTO drives used on tractors are designed to transmit rotary motion and slide in and out to compensate for changes in length
    when cornering or going up and down hills. Sounds like your application is smaller but there are places that make smaller
    splined shafts and hubs. One example...

    http://www.sdp-si.com/catalogs/
    Keith
    __________________________
    Just one project too many--that's what finally got him...

  8. #28
    Join Date
    Jan 2013
    Posts
    122

    Default

    Flanged bearing mount.
    https://www.mcmaster.com
    Inner bearing bushing fastened to the rotating shaft. Flange attached to whatever you want to do the pulling.

    Ken

  9. #29
    Join Date
    Dec 2004
    Location
    East Coast, USA
    Posts
    5,403

    Default

    Quote Originally Posted by Davek0974 View Post
    Looking for a rotary joint, no idea what its called
    I think it's a huge joint that moves around from person to person.
    Work hard play hard

  10. #30
    Join Date
    Aug 2007
    Location
    Hertfordshire, England
    Posts
    1,356

    Default

    Quote Originally Posted by KMoffett View Post
    Flanged bearing mount.
    https://www.mcmaster.com
    Inner bearing bushing fastened to the rotating shaft. Flange attached to whatever you want to do the pulling.

    Ken
    Yep i think that will work

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •