DIMENSION SERIES

•  single-row single-direction - 617.. 618.. 628.. 638.. 619.. 160.. 60.. 630.. 161.. 62.. 622.. 632.. 63.. 623.. 633.. 64..
•  double-row double-direction - 38.. 39.. 30.. 32.. 33..
•  single-row double-direction - Q19.. Q10.. Q12.. Q2.. Q3.. QJ19.. QJ10.. QJ12.. QJ2.. QJ3..

STRUCTURE

Single-row angular-contact single-direction radial ball bearings are not separable and consist of an outer ring, an inner ring and a cage with balls. The cage is guided on the inner ring  (“B” after  the  cage designation), or on  the outer  ring (“A” after  the cage designation) or solely on  the balls  (no letter after the cage designation). The basic feature differentiating angular contact ball bearings  from  regular  ball  bearings  is  a  different  construction of the inner guided track of the outer ring. The track is positioned  axially  in  one  direction. Owing  to  that  fact  such bearings can carry considerable axial  loads exactly  in  this direction.

We can set apart several makes of guided  tracks of bearings conformably to their contact angles:

•   25° - A or AC or E designation behind the bearing’s symbol
•   26° - AA designation behind the bearing’s symbol
•   40° - B designation behind the bearing’s symbol
•   15° - C designation behind the bearing’s symbol
•   12° - CA designation behind the bearing’s symbol – special high-speed versions
•   10° - CB designation behind the bearing’s symbol - special high-speed versions

Dimension series are  in direct  relation  to  the angle of  the
inner track:

•   for  narrow  and  light  series  as  718..,  719..,  70.. the  angles A  and  C  are most  often  used,  e.g.  7016 ATBP4, 7000 CTBP4,
•   for medium 72.. series the angles A, B, C are used, e.g. 7206 B, 7210 C, 7209 ATBP5,
•   for wide and heavy  series as 73.., 74.. one uses most often the angle B, e.g. 7322 BM.