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Steel
11-03-2017, 07:52 PM
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.

21036

JAZZCNC
11-03-2017, 08:43 PM
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.

Steel
11-03-2017, 08:46 PM
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 !!!

JAZZCNC
11-03-2017, 09:02 PM
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.!

Steel
11-03-2017, 09:11 PM
Dam and i paid 260 inc postage of a ebay guy in Germany

JAZZCNC
11-03-2017, 10:50 PM
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.!:stupid:

komatias
12-03-2017, 11:13 AM
Yup got fleeced like that once too: 6001zz in the bearings blocks and paint inside the bore to hold the bearings in place...

Steel
15-03-2017, 08:50 PM
After many emails i got given 6 angular contact bearings, hopefully this is a lesson for everyone to ask what bearings are fitted !!!