Angular contact bearings
Brands:
SKF bearings, INA bearings, FAG bearings, KOYO bearings, NACHI bearings, NSK bearings, IKO bearings, TIMKEN bearings, NTN bearings

Types:
single row angular contact ball bearings
double row angular contact ball bearings
four-point contact ball bearings

Bearing rings and balls possess their own contact angle that is normally 15,25,30,40
a) C: normal contact angle a=15
b) AC: normal contact angle a=25
c) B: normal contact angle a=40

Models:
Series   Item NO.  Bore Diameter (mm)
3200   3200~3222      10~110
3300   3302~3322      15~110
5200   5200~5220      10~100
5300   5303~5316      17~80
7000   7000~7060      10~300
7200   7200~7248      10~240
7300   7300~7340      10~200
7900   7906~7932      30~160 etc