Welcome to Our Community

Some features disabled for guests. Register Today.

Motor Coupling Question

Discussion in 'CNC Mills/Routers' started by Project Hopeless, Aug 28, 2019.

  1. Project Hopeless

    Builder

    Joined:
    Jan 25, 2019
    Messages:
    43
    Likes Received:
    7
    My ball screw kit came with 6.5x10mm motor coupling and I need 8x10mm. So I could drill out the ones I have. But I question how good these are to begin with.

    They are an aluminum alloy slit type with small 2.5mm screws to apply the clamping force. Wouldn't a slit type with set screws be better than the clamping type, less likely to slip?

    My steppers have a notch in the shaft for a set screw but the ball screws do not. If so do I grind a small notch in the ball screw shaft?
     
  2. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,063
    Likes Received:
    480
    Yes grind a small flat for the setscrew,
    I would just buy the right size, If you have a metal lathe you can drill them out well enough but any other way will be disappointing, they are cheap on ebay any size you need.
    Use loctite.
    Cheers
    Gary
     
    Peter Van Der Walt and sharmstr like this.
  3. kam

    kam New
    Builder

    Joined:
    Sep 1, 2016
    Messages:
    7
    Likes Received:
    3
     
  4. kam

    kam New
    Builder

    Joined:
    Sep 1, 2016
    Messages:
    7
    Likes Received:
    3
    On the ball screw, slide the coupling on the shaft. Use a transfer punch through the set screw hole and punch the shaft . Then take the coupling off and drill a dimple for the set screw to fit in .this is just another way instead of grinding the ball screw shaft.
     
  5. jeffmorris

    jeffmorris Journeyman
    Builder

    Joined:
    Nov 6, 2017
    Messages:
    444
    Likes Received:
    102
    I think that punching the shaft may bend the shaft.
     
  6. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,063
    Likes Received:
    480
    don't punch it with your fists ;)
     
  7. Project Hopeless

    Builder

    Joined:
    Jan 25, 2019
    Messages:
    43
    Likes Received:
    7
    Loctite on just the screw correct?
     
  8. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,063
    Likes Received:
    480
    You can put it on the coupler to rod interface as well.. just be careful if using red it will be difficult to get back apart if you need to.. :)
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice