SKF - Rolling Bearings

6 Needle roller bearings
Needle roller / angular contact ball bearings
SKF needle roller / angular contact ball bearings
combine a radial needle roller bearing
with an angular contact ball bearing. The
radial loads are accommodated exclusively by
the needle roller bearing and the axial loads
exclusively by the angular contact ball bearing.
These low cross section bearings can operate
at high speeds and accommodate heavy radial
and light axial loads. SKF supplies these bearings
without seals in the following two series:
Fig. 19
• NKIA series († fig. 19), bearings can
accommodate axial loads in one direction
• NKIB series († fig. 20), bearings can
accommodate axial loads in both directions
NKIA 59
Bearings in both series are separable i.e. the
inner ring can be mounted separately from the
outer ring, rolling element and cage assemblies.
However, the inner rings in the NKIB
series are not interchangeable with those
from another seemingly identical bearing.
Therefore, the bearings must be kept together
as supplied.
Depending on the application, needle roller /
angular contact ball bearings can be grease or
oil lubricated. In the case of grease lubrication,
both the needle roller and angular contact ball
bearing should be filled with the same lubricant
prior to mounting.
Fig. 20
NKIB 59
Fig. 21
NKIA 59, back-to-back arrangement
684