Product Description:
Spherical roller bearings consist of an outer ring having a continuous spherical raceway centered
within and two rows of barrel-shaped rollers operating in separate raceway grounds ground into
the inner ring with a center rib to guide the roller (refer to fig.. 1.) This type of bearing has a self
aligning nature, so, it can be used in cases where misalignment between the inner and outer ring
occur from shaft mounting errors of shaft deflections.
The allowable misalignment for these bearings, being varied due to the dimensional series and
loading conditions, is about 0.0009 radian (0.5°) for ordinary loads. For light loads, this angle
can be up to 0.035 radians (2')
These bearings have a large capacity for radial loads, axial loads in either direction, and
combinations of these loads, They are also suited for applications where vibration and/ or impact
forces are encountered
The design of spherical roller bearing are standardized so that the center roller guide rib comes
standard with the inner ring as one united inner ring (please refer to fig. 2). Smaller bearings
(Bore diameter of 50mm or Tess ] of bearing series 222,213 and 223 come in the design shown in
Fig. 3. This design uses a separable guide ring between the two rows of roller and is specified by
attaching the suffix "C" at the end of the basic number. For the bearing of series 213 (bore
diameter of 55mm or more ) the guide ring between the rollers is located on the raceway of the
outer ring {please refer to Fig. 4.0} .
There are other types of bearings having cylindrical or taper bore diameters. Bearings with topered
bore diameters are specified by attaching th suffix "K" at the end of the basic number. The taper
is generally 1/12, however, a toper of 1/30 is made for bearings of series 240 and 241 which
are specified by attaching the suffix "K-30" at the end of the basic number. In most cases, bearings
with tapered bore diameters are mounted on the shaft by means of an adapter or withdrawal sleeve.
When the outer diameter of spherical roller bearings is 320mm or more, an oil hole and oil groove
provided in the outer ring to supply lubricant.
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