Colchester worn cross slide nut

  1. fizzy Member

    Messages:
    6,357
    uk
    The only apparent wear in my Colchester Triumph is the cross slide nut. There isn't much backlash but you can push pull the cross slide and it definitely moves a tad and makes a clonk.

    Anyone know where I can buy one?
    Or would someone on here be interested in machining one for me?

    On the plus side when I removed the nut I can slide the cross slide back and forth and there is no slop of any description - smooth as silk :laughing:

    And another question - quite often now I take piccies with my phone - they look fine - and on my desktop - but when I upload them they get rotated - very annoying!
    nut1.jpg


    nut2.jpg
     
  2. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

    Messages:
    15,459
    Location:
    East Yorkshire
    How much? even a new one has some backlash
     
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  3. pressbrake1

    pressbrake1 Forum Supporter

    Messages:
    2,522
    essex england
    You could split the nut to take out some backlash
     
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  4. mike os

    mike os just a little insane.....

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    Location:
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    Like rocking horse poop... only more costly
     
  5. fizzy Member

    Messages:
    6,357
    uk
    When I grab the slide and push or pull it visibly moves and goes clonk. Perhaps 2mm or so.
     
  6. brightspark

    brightspark Member

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    yarm stockton on tees
    its no big deal having backlash it wont affect the accuracy of your cuts
     
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  7. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

    Messages:
    15,459
    Location:
    East Yorkshire
    Have you checked for play in the hand wheel assembly etc. Doesn’t look to have 2mm of wear in the nut
     
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  8. fizzy Member

    Messages:
    6,357
    uk
    Not yet how do I do that?
     
  9. fizzy Member

    Messages:
    6,357
    uk
    There isn't much backlash when you turn the handle so perhaps it is the other end.
     
  10. pressbrake1

    pressbrake1 Forum Supporter

    Messages:
    2,522
    essex england
    Thrust bearing assembly could be loose
     
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  11. scottmk1

    scottmk1 Forum Supporter

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    Location:
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    There's a guy on ebay that makes new nuts, his ebay name is reltub something or other, I'll send you a link if you want
     
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  12. mike os

    mike os just a little insane.....

    Messages:
    6,568
    Location:
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    Please

    Although I think the screw us worn on mine as well
     
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  13. fizzy Member

    Messages:
    6,357
    uk
    I did see that thanks - but he says he won't be doing any for quite a while - will message him anyway but first will try the handle end in case that is the problem.
     
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  14. mike os

    mike os just a little insane.....

    Messages:
    6,568
    Location:
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    Backlash in the handle is an easy fix , just adjust it
     
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  15. scottmk1

    scottmk1 Forum Supporter

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  16. Pete.

    Pete. Member

    Messages:
    9,407
    Location:
    Kent, UK
    Yes this or as Pressbrake said the thrust bearing. Some Colchesters have a telescoping screw to accommodate a taper turning attachment.The handwheel can be nice and snug but the screw moving through the thrust bearing.
     
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  17. minimutly Member

    Messages:
    1,215
    Location:
    Pembrokeshire Wales
    I think you're worrying about nothing - backlash in the cross slide doesn't affect anything so long as you know its there.
    Mine has around a third of a turn - what's that - 60 thou roughly? Don't fret it as long as everything else is done up.
     
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  18. fizzy Member

    Messages:
    6,357
    uk
    It isnt the backlash in the handle that bothers me - it is the way it rocks back and fore.
     
  19. fizzy Member

    Messages:
    6,357
    uk
    I have messaged the bloke on Ebay about the cross nuts. He does have one that will fit my lathe but they are made from brass not bronze. Surely phos bronze would be preferred. Isn't brass more likely to cause wear on the screw?
     
  20. ronan

    ronan Member

    Messages:
    9,918
    dublin

    If you posted him a bit of Bronze, would he make you one ?
     
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