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IndustryArena Forum > MetalWorking Machines > Knee Vertical Mills > No backlash adjustment screw on feed nut bracket(yoke)
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  1. #1
    Join Date
    Jan 2021
    Posts
    6

    No backlash adjustment screw on feed nut bracket(yoke)

    I have a supermax ycm1 1/2 va and somehow the feed needs (2 nut design) came out of the bracket so I removed the table and lead screw to feed the assembly back into it but noticed there were no adjustment screws at all not even a tapped hole for an adjustment screw to go into. The bracket does however have a boss where it looks like the screw would normally go. Is there some other mean of adjusting the backlash on these machines?

  2. #2
    Join Date
    Feb 2008
    Posts
    69

    Re: No backlash adjustment screw on feed nut bracket(yoke)

    Do you have a picture?

    Sent from my 5007U using Tapatalk

  3. #3
    Join Date
    Feb 2008
    Posts
    69

    Re: No backlash adjustment screw on feed nut bracket(yoke)

    You could make a shim stock washer under I of them, then reinstall it.
    It will take a bit of fiddling to find the right thicknesses, and will depend if you screw is worn in the centre.

    Or just add the slots in the nut yourself, only 1 needs to be done.
    If you don't have a rotary table, the slots could be marked out and filed out, as it's only Bronze.

    Sent from my 5007U using Tapatalk

  4. #4
    Join Date
    Jan 2021
    Posts
    6
    Quote Originally Posted by Davo J View Post
    You could make a shim stock washer under I of them, then reinstall it.
    It will take a bit of fiddling to find the right thicknesses, and will depend if you screw is worn in the centre.

    Or just add the slots in the nut yourself, only 1 needs to be done.
    If you don't have a rotary table, the slots could be marked out and filed out, as it's only Bronze.



    Sent from my 5007U using Tapatalk
    Hope the pics showed up.
    If they did well that’s the exact bracket I believe I have. I don’t think it’s the original.

    I’m leaning towards slapping the yoke on a drill press. Scary thought however.

    Side note: how do the nuts in the supplied pic work as far as adjustment goes?

  5. #5
    Join Date
    Jan 2021
    Posts
    6

    Re: No backlash adjustment screw on feed nut bracket(yoke)

    Davi J attached pics of the bracket I have in the reply above this one. Have a gander. Of course with out those actual feed nuts. I have split nuts.

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