Recommendations for 30mm Linear Rail Bearing


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Thread: Recommendations for 30mm Linear Rail Bearing

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    Default Recommendations for 30mm Linear Rail Bearing

    I have a Chinese CNC Router made by JCUT, 2012. The X axis is on 30mm rails and came stock with MSA 30S-N bearings. I am wanting to know how to find out what other brands/options I have. I am a newbie in the world of bearings.Recommendations for 30mm Linear Rail Bearing-getattachment-jpgRecommendations for 30mm Linear Rail Bearing-20180307_151036-jpgRecommendations for 30mm Linear Rail Bearing-20180307_151043-jpg

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    Default Re: Recommendations for 30mm Linear Rail Bearing

    If you plan on replacing the bearings only, you'll need the exact same bearings. Otherwise, you'll need to replace the rails and bearings.
    Hiwin is one popular brand used by a lot of members here.

    Gerry

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    Default Re: Recommendations for 30mm Linear Rail Bearing

    Quote Originally Posted by ger21 View Post
    If you plan on replacing the bearings only, you'll need the exact same bearings. Otherwise, you'll need to replace the rails and bearings.
    Hiwin is one popular brand used by a lot of members here.
    Thanks. So the brand I am using now is PMI, I believe. Is that a good brand? Is Hiwin better?
    I don't have a dust collection system and so there is a lot of dust in the operation. Looking for something that can deal with that as well as possible.



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    Default Re: Recommendations for 30mm Linear Rail Bearing

    AND, in the model id MSA 30s-n what do the letters MSA stand for and what does the suffix s-n indicate?



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    Default Re: Recommendations for 30mm Linear Rail Bearing

    Quote Originally Posted by danielcoyle View Post
    AND, in the model id MSA 30s-n what do the letters MSA stand for and what does the suffix s-n indicate?
    Here is there catalog, not hard to find, they appear to be made by PMI linear

    Attached Files Attached Files
    Mactec54


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    Default Re: Recommendations for 30mm Linear Rail Bearing

    try replacing the balls and the end seals.



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    Default Re: Recommendations for 30mm Linear Rail Bearing

    If you are going to run the machine with no dust collection, you need to grease the bearings every 2-3 hours of run time, to keep the dust from getting in.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Default Re: Recommendations for 30mm Linear Rail Bearing

    There's a harbor freight 25% off coming up for easter. Get some type of dust collection going and very carefully open and clean those bearings.



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    Default Re: Recommendations for 30mm Linear Rail Bearing

    Thanks guys. The type of carving I do sort of precludes anything but a very expensive collection system. I make wood helmets and going 6 and 7 inches deep into the block just makes it tough to get the collector in there at the same time as the machine is carving. Also, it sounds like it might be possible to simply clean and re use the bearings? Is that true?



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    Default Re: Recommendations for 30mm Linear Rail Bearing

    Quote Originally Posted by danielcoyle View Post
    Also, it sounds like it might be possible to simply clean and re use the bearings? Is that true?
    yes absolutely. unscrew the end seals and the balls fall out, wash everything and grease it. you will need a small amount of grease in the end seals so that the balls stay in while you screw it back on. measure the balls, you may find they are .001" smaller than a nominal size.. then buy some new ones if that's the case.



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    Default Re: Recommendations for 30mm Linear Rail Bearing





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    Default Re: Recommendations for 30mm Linear Rail Bearing

    Thanks so much for the info. Where do I get the correct balls? Is there a particular grade or type or?? I already, without having seen your link first, took the bearings off and used my air compressor to "clean" them out. There was a little bit of shavings from wear. The bearings would not slide at all when I tried to pull them off the gantry rails by hand. Had to use the machine to push them off. After "cleaning" them and putting them back on they were not great but much much better. Then reattached and greased them up. Is it bad to use them this way for a little while or should I go ahead and do the rebuild you sent in the video?



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Recommendations for 30mm Linear Rail Bearing

Recommendations for 30mm Linear Rail Bearing