Calculating the axial load for bearings mounted singly or paired in tandem
Table 1 provides the necessary equations for various bearing applications and load cases. The equations are valid under the following conditions:
- the bearings are adjusted against each other to practically zero clearance, but without any preload
- bearing A is subjected to a radial load FrA and bearing B to a radial load FrB
- both FrA and FrB are always considered positive, even when they act in a direction opposite to that shown in the figures
- the radial loads act at the pressure centres of the bearings (→ distance a in the product table)
Ka is the external axial force acting on the shaft or on the housing. Load cases 1c and 2c are also valid when Ka = 0.
Values of the calculation factor Y are listed in the product table.