A load component is produced in the axial direction when radial loads are experienced by angular contact and tapered roller bearings. Because of this asymmetry, these types of bearings are often used in pairs, either face to face or back to back. The axial loads can be calculated using the following equation:
Component load in the axial direction = Fai = 0.6Fsrad / Xdax
Let us assume that radial loads R1 and R2 are applied to bearings 1 and 2 respectively, and an external axial load Fae is applied as illustrated. If the axial load factors Xdax1 and Xdax2 and the radial load factor Xdrad apply, then the equivalent loads P1 and P2 can be calculated as follows:
A. Single or in tandem 40º angular contact ball bearings
1. Combined, equivalent static load:
2. Combined, equivalent dynamic load:
B. Back to back or face to face 40º angular contact ball bearings
1. Combined, equivalent static load:
2. Combined, equivalent dynamic load:
where Fsrad and Fsax are the loads acting upon the bearing pair.