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IndustryArena Forum > Mechanical Engineering > Linear and Rotary Motion > what bearing fit with acme screw 1/2 -10(for cheap ball screw)
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  1. #1
    Join Date
    Jun 2007
    Posts
    25

    Question what bearing fit with acme screw 1/2 -10(for cheap ball screw)


    hello i'm new member live in quebec and i have starting to built a cnc
    with the same design at this adress

    http://lafondje.perso.cegetel.net/ch.../CNC%20040.jpg

    what bearing fit with acme screw 1/2 -10(for cheap ball screw)
    or what your recommended?

    p.s.: excuse my english i speack specialy french

  2. #2
    Join Date
    Feb 2004
    Posts
    1086
    Apex, you can use 1/2" radial ball bearings for ACME 1/2-10. You also want some sort of thrust bearings to keep the screw from moving laterally. Check out my website for a way to do this without machining the ends of the rod, www.cncrouterparts.com. If you are interested, you can order parts and have them sent to me, and I can send a single shipment to you in Canada to avoid high freight costs.

    Thanks,

    Ahren
    www.cncrouterparts.com

  3. #3
    Join Date
    Sep 2006
    Posts
    245
    Are you talking about using ball bearings in the grooves of the ACME screw to make a ball screw? The balls would need to ride along both sides of the thread. The balls would have a third contact point on the top surface. Wouldn't this require something to slide as the balls roll?

    The balls roll with contact points at opposite sides in a true ball screw. There are no sliding surfaces.

  4. #4
    Join Date
    Jun 2007
    Posts
    25
    i want a bearing fit in 2 grooves at same time,
    the bearing turn and forward when the screw turn





    thanks for your info

  5. #5
    Join Date
    Sep 2006
    Posts
    245
    That sounds like an interesting idea. I still think there will be some sliding surfaces, but there might be less friction than a standard ACME bearing.

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