1. #1
    Hi, Can someone please give me there professional opinion on what bearing type this diagram represents on the BK12 fixed side shown in the attached photo.
    Cheers in advance.

    Click image for larger version. 

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  2. #2
    BK is Fixed end and consists of of 2 angular contact bearings held and preloaded within the housing. The photo shows all sizes depending on end machining and screw diameter. IE: Bk12 being used for 16mm screws Bk15 20mm etc.

    BF is the floating end and just uses normal bearing which floats within the housing and is held onto the ballscrew with a Circlip.
    Last edited by JAZZCNC; 11-03-2017 at 08:46 PM.

  3. #3
    Quote Originally Posted by JAZZCNC View Post
    BK is Fixed end and consists of of 2 angular contact bearings held within the housing. The photo shows all sizes depending on end machining and screw diameter. IE: Bk12 being used for 16mm screws Bk15 20mm etc.

    BF is the floating end and just uses normal bearing which floats within the housing and is held onto the ballscrew with a Circlip.
    That's just what i thought until i took the BF12 apart and found 2x 6001z bearings !!!

  4. #4
    Quote Originally Posted by Steel View Post
    That's just what i thought until i took the BF12 apart and found 2x 6001z bearings !!!
    Well it's knock off then because should have 2 x AC bearings which go back to back. It used to be common on the really cheap ones that the bearings where in the wrong way around so didn't work correctly allowing slop but still used AC bearings. Never seen one with skate board bearings before.!

  5. #5
    Dam and i paid 260 inc postage of a ebay guy in Germany

  6. #6
    Quote Originally Posted by Steel View Post
    Dam and i paid 260 inc postage of a ebay guy in Germany
    Well if that's 2.60 inc postage then what did you expect.!

  7. #7
    Yup got fleeced like that once too: 6001zz in the bearings blocks and paint inside the bore to hold the bearings in place...
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  8. #8
    After many emails i got given 6 angular contact bearings, hopefully this is a lesson for everyone to ask what bearings are fitted !!!

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