There are also "universal" sets which can be positioned in any direction within the set.
AC bearings must be opposed. They can be back to back duplex (DB), face to face (DF), tandem or a pair in the same direction (DT) usually opposed by another pair.
Then there are also DBT, DBD, DBQ, DBTT, DBTD & DBTQ for triples, quads etc.
This is well explained in the engineering section of the Barden precision bearings catalog (mine is C-20)
If all else fails, read the instructions (book) LOL
Dick Z
Hu, my FAG book only mentions "the contact angle and axial preload ensures good ball control" etc. not whether it's light, medium, heavy, or ????????? I TAKE THAT BACK, THEY ACTUALLY LIST THE PRELOADING FORCE IN NEWTONS
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DZASTR
Last edited by RICHARD ZASTROW; 07-01-2009 at 04:15 PM.
Reason: add note for Hu
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