Taper roller bearing have inner and outer ring raceways and tapered rollers arranged in between. 
Conical surface of the projection lines of all are the same point on the bearing axis together. 

Tapered roller bearing is mainly exposed to the radial diameter, axial load. Load carrying capacity depends 
On the angle of the outer ring raceway, the greater the angle the greater the carrying capacity. 

Metric series: 
30202, 30203, 30204, 30205, 30206, 30207, 30208, 30209, 30210, 30211, 30212, 30213, 30214, 30215, 
30303, 30304, 30305, 30306, 30307, 30308, 30309, 30310, 30311, 30312, 30313, 30314, 30315, 30316, 

Inch series: 

LM, HM, JL, JHM, NA, LL, -D -AB, ect 

567178/10, 329013A/Q, 18690/20, LM11749/10, LM11949/10, L45449/10, 

LM12749/10, LM48548/10, JLM104945/10, 4T-1988/22, 25678CA/Y32011 

11590/20, A5069/A5144, A2047/A2126, 603049/12, 88048/10, 802048/11 

LM67048/10, R25/26, TZED045-1, LM11749/10, LM11949/10, LM12749/10, LM12749/11, LM44643/10, LM67048/10, LM48548/10 and L44649/10 and so on.