SKF - Rolling Bearings

Designs and variants
Needle roller / cylindrical roller thrust
bearings
SKF needle roller / cylindrical roller thrust
bearings in the NKXR series († fig. 31) combine
a radial needle roller bearing and a cylindrical
roller thrust bearing. The cylindrical
roller and cage thrust assembly is identical to
the 811 series. These combined bearings are
supplied without an inner ring. In applications
where the shaft cannot be hardened and
ground, bearings can be combined with an
inner ring († fig. 32). Appropriate inner rings
are listed in the product tables and must be
ordered separately.
Needle roller / cylindrical roller thrust bearings
in the NKXR series are separable. Both
the cylindrical roller and cage thrust assembly
and shaft washer can be mounted separately
from the rest of the bearing. These bearings,
without the designation suffix Z, should be oil
lubricated whenever possible, as oil facilitates
an adequate supply of lubricant to the bearing.
Needle roller / cylindrical roller thrust bearings
with the designation suffix Z († fig. 33)
have a stamped steel cover without lubrication
holes. The steel cover extends over the shaft
washer of the cylindrical roller thrust bearing.
It is firmly attached to the housing washer that
is integral to the needle roller bearing outer
ring. The cover makes these bearings
non-separable.
NKXR
Fig. 31
Fig. 32
6
Fig. 33
NKXR .. Z
689