RBC Thin Section Ball Bearings
Duplex Pairs & Axial Preloading
RBC thin section ball bearings are engineered to solve a variety of design problems that cannot be solved with conventional ball bearings.
General Information
DUPLEX PAIRS & AXIAL PRELOADING
Duplex Pairs
Duplex bearings are a pair of angular contact thin section ball bearings specially ground for use as a matched set.
There are three basic mounting methods to accommodate different loading requirements:
- Back to back (DB), B-Type
- Face to face (DF), F-Type
- Tandem (DT), T-Type
A duplexed pair can be used to provide accurate shaft location, to increase capacity or to increase stiffness of the bearing assembly. A duplex pair of thin section ball bearings is ground so that when mounting using recommended fits, there will be no internal clearance in the bearings.Â
Back to Back (DB)
B-Type
- Heavy radial loads
- Combined thrust and radial loads
- Reversing thrust load
- Excellent rigidity
- Moment loads
Face to Face (DF)
F-Type
- Heavy radial loads
- Combined thrust and radial loads
- Reversing thrust load
- Moment loads
Tandem (DT)
T-Type
- High one-direction thrust loads
- Minimum axial shaft deflection
- Heavy radial loads
Axial Preloading
Standard duplex bearings are ground so that there will be a light axial preload induced on the bearing at nominal conditions. In some applications increased bearing stiffness may be required. In these cases the duplex grinding can be done such that a heavier axial load is induced in the mounted bearing. This load can be increased or decreased to meet the requirements of a particular application.
