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  1. #21
    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'd loose the thickness of the flange. The guy i got the set off for my 260 can't get the same nuts anymore, and even those were remachined to fit the threaded mounts.

    I've just helped someone put a 14 x 5mm ground screw on a 240 lathe x axis and it worked well.

  2. #22
    Quote Originally Posted by Ricardoco View Post
    Hi there, did you manage to source some new screws for your 260 or did make do with the old, i only ask as my Z spat its balls out and im using a old lead screw as a temporary measure, but will replace all with new machined screws if i can find a reasonable priced source...

    Rick
    Hi Ricardoco,
    I found a company that makes 14mm ballscrew with a threaded nut but these were only rolled ballscrews not ground. But the original ballscrews on the VMC260 are rolled, so....
    http://www.mooreinternational.co.uk/...6/FGI14X4.html

    I keep my existing ballscrew for now, I can not detect much backlash so far, so should be OK untill I get enough money aaside to get some new ones...

    An other option I found is a guy specialised in fixing damaged ballscrew. May worth a try?

    http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123


    RNR
    Last edited by rnr107; 15-06-2012 at 08:09 AM.

  3. #23
    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.
    wrong thread on the nut

  4. #24
    Quote Originally Posted by i2i View Post
    wrong thread on the nut
    Hummm.... I wonder, It should not be too dificult to make a new nut holder (with the right thread)?
    Looks like a fairly simple shape and made of aluminium...


    RNR

  5. #25
    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.
    is the original steel.??

  6. #26
    This is probably a bit far fetched, but I wonder if it would be possible to machine a thread on one of the cheap ballnuts from china? The grade of steel is clearly hard, but it does file so it may be possible to machine.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  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.
    that's the way i went for my 260.

  8. #28
    Quote Originally Posted by i2i View Post
    is the original steel.??
    Nope... It is a kind of aluminium alloy...


    Quote Originally Posted by Jonathan View Post
    This is probably a bit far fetched, but I wonder if it would be possible to machine a thread on one of the cheap ballnuts from china? The grade of steel is clearly hard, but it does file so it may be possible to machine.
    Hi Jonathan,
    You would do that on a Lathe I guess. So would you first remove all the balls ?

    RNR
    Last edited by rnr107; 15-06-2012 at 06:13 PM.

  9. #29
    Quote Originally Posted by rnr107 View Post
    Nope... It is a kind of aluminium alloy...




    Hi Jonathan,
    You would do that on a Lathe I guess. So would you first remove all the balls ?

    RNR
    Thanks for the link RNR, mine are steel and i would have opted for the repair but to be fair it really was fooked, i couldnt understand what was happening untill i had stripped everything down and by that time i had moved the Head up and down at least 20 times just to get it to go to the top so i could get the thing off... it was toast... i will replace all three with the threaded type like for like as i just dont have the time to mess around doing the other type with the machining..... I will let you know how i got on when its done but dont hold your breath as im building a gantry machine at the moment so it could be a while...

    Rick
    Always bear in mind that your own resolution to succeed is more important than any other - Abe Lincoln

  10. #30
    Hi Laurent, I'm rebuilding a 260VMC, the electronics were replaced by Mach 3, but has been as its my first rebuild any other photos you have of it 'naked' would be of great help. Information on these things is as rare as rabbit horns and any that would help keep me from making mistakes would be most welcomed.
    PS I have just rebuilt all three ballscrews, Scott Sayers from GMS Ball Ltd (scott1711@hotmail.com, 01903 264601) was really helpfiul and extremely knowledgable.

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