1. Hi there I just listed an auction on ebay.
    4 pcs of 600mm long HGR20C HIWIN rails

    2 pcs of 1000mm long HGR20C HIWIN rails
    12 pcs of HGH20CA HIWIN linear bearing blocks (6 bearings are still in original packaging)
    + some grease nipples, green plugs(2sizes) and linear bearing inserts
    if somebody is interested and will buy through this advert (no fleeebay)I will deduct final sale value of 40 from sale price- fair for everybody. I meant to make cnc mill but due to circumstance never have time to get around it and I doubt I will- hence sale. Selling as set

    Click image for larger version. 

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    Last edited by Lee Roberts; 12-03-2012 at 11:20 PM. Reason: added pictures, spelling and grammer

  2. #2
    Hi there ,

    Quite interesting deal...

    Do you remember the preload value of these bearings ?

    cheers.

  3. Quote Originally Posted by iak65 View Post

    Do you remember the preload value of these bearings ?

    cheers.
    As far as I remember preload was ZA, but I don't have any invoice to confirm it. Maybe there is a way to tell preload from engraved code on bearing HGH20CA 0A084-3B??

  4. ZO = Light Preload
    ZA = Medium Preload
    ZB = Heavy Preload

  5. Quote Originally Posted by AdCNC View Post
    ZO = Light Preload
    ZA = Medium Preload
    ZB = Heavy Preload
    That's exactly what I ordered- ZA Medium preload. It suppose to be used for rigid vertical CNC mill. Does the code on bearing confirms preload??

  6. #6
    Quote Originally Posted by wiatroda View Post
    That's exactly what I ordered- ZA Medium preload. It suppose to be used for rigid vertical CNC mill. Does the code on bearing confirms preload??
    I am on the point of purchasing identical items so am interested, how can I get in touch to discuss and perhaps collect Dave

  7. #7
    Hi again, here is what I found out.

    To determine the preload of the HIWIN HGH20CA slide, just put the slide on the rail and hold the rail vertically. If the slide moves under its own weight the preload is Z0.
    If not it is ZA. ZB is available for bigger slides only.
    If you still have the packaging you can also find the preload value there (like on the picture) :
    The C at the end is the precision value according to the HIWIN catalogue and determines the price of the slide.
    ZA is good preload for a precise and stiff XY table on a CNC.
    Are the items sold yet?

    Cheers.
    Click image for larger version. 

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    Last edited by iak65; 14-05-2012 at 10:31 AM. Reason: adding one info

  8. hi iak65
    So it looks like they're ZA- they don't slide down by themselves
    I still have them, but after unsuccessful attempt to sell them few times on fleebay I decided (rather got funds) to carry on with my cnc mill project as planned.
    That's the screen capture how I plan the mill to looks like
    Click image for larger version. 

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    Basically structure is going to be 6mm steel plate milled to size + I plan to fill it up with epoxy granite for extra rigidity.

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