Spherical roller bearings are self-aligning bearings, comprising
solid outer ring with a concave raceway, solid inner ring and two rows of
barrel rollers with cages. The centre point of the sphere in the outer ring
raceway is at the bearing axis. Therefore, the bearings are self-aligning and
insensitive to misalignment of the shaft relative to the housing, which can be
caused, for example, by shaft deflection. Spherical roller bearings are
designed to accommodate heavy radial loads, as well as heavy axial loads in
Various types exist that differ by internal design,
including bearings with a tapered bore inner caliber. The bearings are easily
mounted on the shaft with an adapter or un-mounting sleeve, and are used in
many industrial machines for their high load capacity.
Depending on their series and size, standard spherical
roller bearings are manufactured to one of following basic designs:
CC design bearings have two
stamped window-type steel cages, an inner ring without flanges and a floating
guide ring centred on the inner ring. The CC design is indicated by the
designation suffix CC.
CA design bearings have a machined double
prong-type brass cage, an inner ring with a retaining flange on both sides and
a floating guide ring centred on the inner ring. The flanges on the inner ring
are designed to keep the rollers in place when swivelling the bearing during
mounting or maintenance. The flanges are not designed to guide the rollers or
accommodate any axial load. The CA design is indicated by the designation
E design bearings have two stamped window-type steel cages,
an inner ring without flanges and a floating guide ring centred on the inner
ring (d ≤ 65 mm) or on the cages (d > 65 mm).
They have an annular groove and three lubrication holes in the outer ring. E
design bearings are indicated by the designation suffix E. All E design
bearings have an optimized internal design for increased load carrying capacity.