I believe that many people have heard of KOYO  self-aligning ball bearings  which are constructed with the inner ring and ball assembly contained within an outer ring that has a spherical raceway. The steel balls, cage, and inner ring can rotate freely at a certain angle, as it is stated that the bearings have self-aligning features. And they can bear radial load and axial load.

KOYO 11306 self-aligning ball bearing, extended inner ring type

d: 30mm
D: 72mm
B: 52mm
M: 0.1kg...

KOYO 24168RR is a  spherical roller bearing, RR type, with a cylindrical bore, which feature a large load rating and self-aligning capability, and these bearings suitable for low- or medium speed applications which involve heavy or impact loading.

Product data of  KOYO Spherical roller bearing 24168RR  

d: 340mm
D: 580mm
B: 243mm
M: 270kg
Basic Dynamic Load Rating Cr: 4440 KN
Basic Static Load Rating Cor: 8400 KN
Limiting Speed - Oil: 650
Limiting Speed –Grease: 490

Our  st...