Spherical Roller Bearings By Nrb Bearings Ltd.

The NRB self-aligning spherical roller bearing is a combination radial and axial bearing,designed to operate even if the shaft and housing are, or become, misaligned under load. This type of heavy duty bearing is the favoured choice when conditions include heavy loads, plus difficulties in establishing or maintaining housing alignment, or when shaft deflection can be expected.

Shaft deflections and housing distortions caused by shock or heavy loads,which lead to misalignment,are compensated for by the internal self-alignment of the bearing elements during operation.Corner loading of rollers, a condition that limits service life on other types of bearings,cannot develop in spherical roller bearings.Optimum bearing capacity can often be realized with up to 1 degrees of misalignment , depending on the size and series of bearing selected.

The inherent compensation for misalignment provided by spherical roller bearings offers the designer the opportunity to use weldments for housing frames instead of complex castings, eliminating high cost machining operations. Even when castings may be preferred ,bore alignment is less critical if spherical roller bearings are specified. Unit design and construction also make the spherical roller bearing convenient to handle during installation or maintenance.