1996 4020ht - new to me, much maintenance required - Page 3


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Thread: 1996 4020ht - new to me, much maintenance required

  1. #41
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    Quote Originally Posted by triumph406 View Post
    There's somebody in Aus who rebuilds spindles, he goes by 'Machtool', maybe here, and certainly on other forums. He's mentioned Fadal spindles in the past, so I believe he's rebuilt them.
    Thanks.
    Have sent a message so will wait for a reply



  2. #42
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    Default Re: 1996 4020ht - new to me, much maintenance required

    Got onto machtool. He is too busy to look at it.
    Still trying to weigh up doing it myself
    About $800aud for the bearings they are a common spindle set here In Aus so no lead time for parts.

    I also changed out the y axis 7304 thrust bearings with proper 61deg contact angle preloaded ball screw support bearings.
    Previous i was chasing 0.01mm in the bearings and they were new. Swapped them out, no shims needed as they have 350kg or so preload on them once assembled. Now have zero backlash on that axis from the bearings and probably last a heap longer as they are a higher capacity bearing for ball screws.



  3. #43

    Default Re: 1996 4020ht - new to me, much maintenance required

    Quote Originally Posted by Deano7/11 View Post
    Got onto machtool. He is too busy to look at it.
    Still trying to weigh up doing it myself
    About $800aud for the bearings they are a common spindle set here In Aus so no lead time for parts.

    I also changed out the y axis 7304 thrust bearings with proper 61deg contact angle preloaded ball screw support bearings.
    Previous i was chasing 0.01mm in the bearings and they were new. Swapped them out, no shims needed as they have 350kg or so preload on them once assembled. Now have zero backlash on that axis from the bearings and probably last a heap longer as they are a higher capacity bearing for ball screws.
    Is this a kit? or did you just find these bearings for some other ball screw?



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    Default Re: 1996 4020ht - new to me, much maintenance required

    Not a kit just worked it out myself.
    22 years in the bearing game helped as suppliers of this bearing set a pretty hard to find.
    If it was 25mm inside dia I would have many manufactures to choose from.



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    Default Re: 1996 4020ht - new to me, much maintenance required

    Quote Originally Posted by rwskinner View Post
    3 of SKF Seals 12360 (Inside block coolant seals)
    1 of SKF Seal 11138 (Seal for thrust retainer to screw seal adapter)
    2 of NSK Angular Contact Bearings 7304BYGUG2 - NB5F 20mm x 52mm x 15mm

    1 of preload shim 0.875" ID x 1.375" OD x 0.001" thick
    Hello I have a VMC15XT, are these bearings and seals for each axis?



  6. #46
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    Default Re: 1996 4020ht - new to me, much maintenance required

    Quote Originally Posted by roberto123 View Post
    Hello I have a VMC15XT, are these bearings and seals for each axis?
    These are per axis. Mine were for a 4020.



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    Default Re: 1996 4020ht - new to me, much maintenance required

    Quote Originally Posted by roberto123 View Post
    Hello I have a VMC15XT, are these bearings and seals for each axis?
    There were only two seals on my vmc15xt.

    The other seals are for the cool power system. Now I don’t remember what the number were for the ones I needed. But it’s one of the two above.



  8. #48
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    Default Re: 1996 4020ht - new to me, much maintenance required

    Yep, I have (Had) water cooled ball screws, so there is an IN and an OUT port in the screw, which means 3 seals for the cooling, and 1 dust seal for the bearing.



  9. #49
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    Default Re: 1996 4020ht - new to me, much maintenance required

    Bit of an update.
    I replaced x and y ball screws seals and thrust bearings. All were changed over to proper ball screw support bearings.
    1 reballed the z axis.
    I installed a reman spindle from its
    Replaced hi/low cylinders as 1 was leaking
    Replaced the crt with a lcd.
    Pulled all the keys and dials and cleaned them.
    Rebuilt the spindle chiller pump.
    Replaced a couple if leaking chiller fittings.
    Replaced the work light with a led worklight
    General clean up and return to service



  10. #50
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    Default Re: 1996 4020ht - new to me, much maintenance required

    How is it running?



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    Quote Originally Posted by gwiz View Post
    How is it running?
    Seems pretty good. Only issue is a false estop every now and then. Always when jogging or operating manually so not a huge deal just a bit frustrating.
    Here is a pic of the cleaned up control with lcd

    Attached Thumbnails Attached Thumbnails 1996 4020ht - new to me, much maintenance required-20191202_214901-jpg  


  12. #52
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    Default Re: 1996 4020ht - new to me, much maintenance required

    Sweet



  13. #53

    Default Re: 1996 4020ht - new to me, much maintenance required

    should throw a few pics up of the beautiful girl cleaned up now.



  14. #54
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    Quote Originally Posted by HalfRapid View Post
    should throw a few pics up of the beautiful girl cleaned up now.
    Yeah will do.
    Attached is some of the parts I used

    Attached Thumbnails Attached Thumbnails 1996 4020ht - new to me, much maintenance required-screenshot_20200514-073156_aliexpress-jpg   1996 4020ht - new to me, much maintenance required-screenshot_20200514-072655_aliexpress-jpg   1996 4020ht - new to me, much maintenance required-screenshot_20191202-215255_ebay-jpg  


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1996 4020ht - new to me, much maintenance required

1996 4020ht - new to me, much maintenance required