Y Axis Drag J325


Results 1 to 3 of 3

Thread: Y Axis Drag J325

  1. #1
    Member
    Join Date
    Aug 2008
    Location
    USA
    Posts
    227
    Downloads
    0
    Uploads
    0

    Default Y Axis Drag J325

    It is my intent to re-ball my screws but after removing the bely on the Y axis I found that my Y-Axis, on a J325, is very tight. It moves but nowhere near the ease of X or Z, both turn easily by hand and will continue to spin with a quick twist. I would like to reduce the drag before I replace the balls. What are the items that cause drag? The ways seem to be well oiled, the ball screw is clean. Are there other adjustments I should look at before the re-balling, like the gibs? If anyone has a Tree manual that shows the parts that would be extremely helpful. Do they need to be cleaned?
    I see there is a grease fitting on the Y-Axis shroud - I have never greased it could the bearing be an issue?
    Sorry for all the beginner questions but I am in the process of starting Retrofit 2.0 and want to cover as many maintenance items as possible.



  2. #2
    Registered dstjohn99's Avatar
    Join Date
    Oct 2017
    Location
    Santee
    Posts
    27
    Downloads
    0
    Uploads
    0

    Default Re: Y Axis Drag J325

    The Y axis carries considerably more weight than X or Z. The grease fitting is for the knee raise/lower gear shaft most likely, as the ways are auto-lube with the oil system. If it doesn't show signs of wear and operates normally, you will likely just cause harm by trying to adjust.



  3. #3
    Member
    Join Date
    Aug 2008
    Location
    USA
    Posts
    227
    Downloads
    0
    Uploads
    0

    Default Re: Y Axis Drag J325

    Thanks, I came to that conclusion. It is possible to remove the bearing plate at the front of the screw- behind the gear, and the ball screw turns without moving the table and moves freely, like it should. There is a bearing in the belt housing that the aforementioned grease nipple feeds. Now that I'm climbing around in places I haven't been for a while I see there is a small oil cup on the knee - probably should fill it...I'm guess with way oil???



Posting Permissions

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


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

Y Axis Drag J325

Y Axis Drag J325