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  1. #21
    Thanks for that.
    Ideally I'd like to try a drop in replacement; but if I can't find a suitable one then I might be in touch :)

    The ball screw is 7.80mm OD, 2.54 pitch.

    Cheers,
    Dan

  2. #22
    i2i's Avatar
    Lives in Cardiff, United Kingdom. Last Activity: 23-12-2016 Has been a member for 7-8 years. Has a total post count of 693. Received thanks 30 times, giving thanks to others 0 times.
    are you sure the pitch is right, they're normally metric. My guess would be 2.5mm.

  3. #23
    I'll double check tonight; I measured ~2.5mm over 1 thread so I measued 5 threads over the fine groove on the OD.
    12.80mm over 5 threads.

    You don't know of anywhere that would sell drop in replacements would you? (apart from Boxford at this point)

    Ta,
    Dan

  4. #24
    i2i's Avatar
    Lives in Cardiff, United Kingdom. Last Activity: 23-12-2016 Has been a member for 7-8 years. Has a total post count of 693. Received thanks 30 times, giving thanks to others 0 times.
    you can get the larger ballnuts, but not the smaller ones. Saying that boxfords price isn't too bad.

  5. #25
    OK, replacement ball screw and ball nut for the x-axis is £204.95 inc VAT + delivery.
    Does anyone have a cheaper drop in solution? Or am I gonna have ta sell my shoes to buy this replacment part?

    I couldn't find a suitable sized replacement on MotionControlProducts. :cry:

  6. #26
    Cant you just remake the recirculation tube? as far as I know it only feeds the balls back to the start, any preload is normally provided by the ball size, I would have thougth a small length of brass or copper pipe that you can get from model shops would be at least worth a go before you shell out all that money :o)

    I have a similar looking one at at home but I'm not sure its 2.5mm pitch. I'll have a look when I get home.

  7. #27
    i2i's Avatar
    Lives in Cardiff, United Kingdom. Last Activity: 23-12-2016 Has been a member for 7-8 years. Has a total post count of 693. Received thanks 30 times, giving thanks to others 0 times.
    you could replace the whole thing with an aftermarket ballscrew, but you'd end up with a flanged ballnut. Not a real problem but you'd loose a bit of travel.

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