A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the moving parts of the bearings - the inner and outer part of the bearings. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads.
The cylindrical roller bearings have greater radial load capacity than ball bearings of same external dimensions and are particularly suitable for arduous duties. The roller bearings feature a modified line contact between rollers and raceways to eliminate edge stressing.
Taper Roller bearings are generally separable, which means the cone assembly, consisting of the inner ring with roller and cage, can be mounted separately from the cup (outer ring). Being separable, mounting becomes easier.
Spherical roller bearings are self-aligning bearings designed for heavy radial loading. They automatically compensate for large angular errors (shaft misalignments). They are usually of the double row design, both the rows of the rollers having common spherical raceways in the outer ring.
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