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IndustryArena Forum > MetalWorking Machines > Fadal > 1996 4020ht - new to me, much maintenance required
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  1. #41
    Join Date
    Jan 2010
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    321
    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
    Join Date
    Jan 2010
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    321

    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
    Join Date
    Mar 2019
    Posts
    12

    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?

  4. #44
    Join Date
    Jan 2010
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    321

    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.

  5. #45
    Join Date
    Jan 2010
    Posts
    29

    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
    Join Date
    Oct 2008
    Posts
    1632

    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.

  7. #47
    Join Date
    Apr 2014
    Posts
    344

    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
    Join Date
    Oct 2008
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    1632

    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
    Join Date
    Jan 2010
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    321

    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
    Join Date
    Jan 2009
    Posts
    52

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

    How is it running?

  11. #51
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    Jan 2010
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    321
    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 20191202_214901.jpg  

  12. #52
    Join Date
    Jan 2009
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    52

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

    Sweet

  13. #53
    Join Date
    Mar 2019
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    12

    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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    Jan 2010
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    321
    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 Screenshot_20200514-073156_AliExpress.jpg   Screenshot_20191202-215255_eBay.jpg  

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