Full complement cylindrical roller bearings incorporate a
maximum number of rollers and are therefore suitable for very heavy
radial loads. However, they cannot operate at the same high speeds
as caged design cylindrical roller bearings. The standard SKF range
of single row full complement cylindrical roller bearings consist
of the NCF and NJG designs.
NCF design
NCF design bearings have two integral flanges on the inner ring and
one integral flange on the outer ring and can thus support axial
loads acting in one direction and provide axial shaft location in
one direction. A retaining ring at the flangeless side of the outer
ring holds the bearing assembly together. The axial internal
clearance in the bearing is provided in the product table and is
designed to permit small axial displacements of the shaft in
relation to the housing, e.g. as a result of thermal expansion of
the shaft, to be accommodated in the bearing.
NJG design
NJG design bearings comprise the heavy dimension series 23 and are
intended for very heavily loaded, slow speed applications. These
bearings have two integral flanges on the outer ring and one
integral flange on the inner ring and can thus support axial loads
acting in one direction and provide axial shaft location in one
direction. In contrast to the other full complement bearing
designs, NJG design bearings have a self-retaining roller
complement. The outer ring with its two integral flanges together
with the roller complement can therefore be withdrawn from the
inner ring, without having to take any precautions to prevent the
rollers from falling out. This simplifies mounting and
dismounting.