When selecting a
mounting arrangement for RBC Thin Section Ball Bearings, you must first
consider the loading condition. A duplex pair of angular contact bearings
may be used for combined loading, moment loading, or heavy thrust loading.
Combination A and C-Type, A and X-Type, or C and X-Type bearings are
common mounting arrangements. Two X-Type bearings should never be mounted
on the same shaft. There may be many different bearing arrangements
for carrying the same load, some typical mounting arrangements are shown
The C-Type bearing
is designed primarily for heavy radial loads. Two bearings can be installed
on the same shaft as shown. By axially fixing one bearing and allowing
the other to float, this configuration allows differential expansion
between the housing and shaft, such as caused by temperature difference,
without adding axial stress to the bearings. Although the C-Type bearing
is designed for radial loads, they can withstand moderate thrust, moment
and reversing loads.
The duplex pair
of A-Type bearings offers several configurations. For reversing loads,
either back-to-back, B-Type, or face-to-face, F-Type, should be used.
The F-Type mounting method demonstrates reversing thrust load. Combined
radial and thrust loads are shown on the B-Type configuration. Both
of these methods can be used for heavy radial loads, combined thrust
and radial loads, or moment loads.
For heavy combined
loading other special mounting arrangements may be employed. As shown
in the top drawing, a duplex pair of A-Type bearings can be used with
a floating C-Type bearing. In this configuration the A-Type bearings
will carry the thrust load and part of the radial load while the C-Type
carries only radial load. An X-Type bearing can replace the duplex pair
of A-Type bearings to carry lower thrust loads as shown in the second
Loading or Moment Loading
for heavy combined loading or moment loading are shown below. A duplex
pair of B-Type bearings resists high thrust, radial and moment loads.
An X-Type bearing may replace the duplex pair in less heavily loaded
applications for weight, space and cost savings.