547,335 active members*
2,706 visitors online*
Register for free
Login
Results 1 to 4 of 4
  1. #1
    Registered
    Join Date
    Mar 2014
    Posts
    1029

    Should I shim those bearings?

    Hi,
    I'm converting my BF20L mill to CNC. In the axes ball screw end support I used 2 deep groove ball bearings. In the Y axis there was some play so I shimmed the bearings using 0.1mm. much better but there is still some play. Is this amount of a play acceptable or do I need to add another shim?

    https://youtu.be/8hoBR_G6iA0

    Sent from my MI 5s Plus using Tapatalk

  2. #2
    Registered
    Join Date
    Jan 2018
    Posts
    918

    Re: Should I shim those bearings?

    Quote Originally Posted by Azalin View Post
    Hi,
    I'm converting my BF20L mill to CNC. In the axes ball screw end support I used 2 deep groove ball bearings. In the Y axis there was some play so I shimmed the bearings using 0.1mm. much better but there is still some play. Is this amount of a play acceptable or do I need to add another shim?

    Sent from my MI 5s Plus using Tapatalk

    Why have you not use angular contact?.
    Do it once, do it right.

    You shouldn't need to shim anything if you have the ballscrew, bearings, nut set up right.
    How have you put the bearings in?. Do you have a stopper ridge central inside the mount and then a bearing each side?.
    This will allow the bearings to press back to back as the nut is tightened thus eliminating play.

    If it is set up like this above and the nut is correct, then that's your backlash I'm afraid.

  3. #3
    Registered
    Join Date
    May 2008
    Posts
    1182

    Re: Should I shim those bearings?

    Buy some AC bearing they are about $7 each. You might need more shims. Set them tight so you can not feel any play in the bearings and it will only spin 2 turns or so by hand if you remove the bearing mount in hand..

    . You might have some play in the ball nut but you need the bearing tight first.
    youtube videos of the G0704 under the name arizonavideo99

  4. #4
    Registered
    Join Date
    Mar 2014
    Posts
    1029

    Re: Should I shim those bearings?

    Quote Originally Posted by arizonavideo View Post
    Buy some AC bearing they are about $7 each.
    Yes, thanks.

    Sent from my MI 5s Plus using Tapatalk

Similar Threads

  1. Did I Shim My Nuts Right? PM-25MV
    By rmachinist in forum Benchtop Machines
    Replies: 4
    Last Post: 09-04-2019, 08:28 PM
  2. Shim Stock
    By wmgeorge in forum FineLine Automation
    Replies: 4
    Last Post: 01-22-2019, 09:02 PM
  3. How do you shim your spindle?
    By CNC-Dude in forum Tormach Personal CNC Mill
    Replies: 6
    Last Post: 03-15-2015, 08:20 PM
  4. machining a shim
    By daveb56 in forum Work Fixtures / Hold-Down Solutions
    Replies: 1
    Last Post: 03-13-2012, 03:24 AM
  5. Shim the part or the vise
    By Silverbullet555 in forum Benchtop Machines
    Replies: 4
    Last Post: 02-03-2012, 11:10 PM

Tags for this Thread

Posting Permissions

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