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 = F_{ai} = 0.6F_{srad} / X_{dax}
Let us assume that radial loads R_{1} and R_{2} are applied to bearings 1 and 2 respectively, and an external axial load F_{ae} is applied as illustrated. If the axial load factors X_{dax1} and X_{dax2} and the radial load factor X_{drad} 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 F_{srad} and F_{sax} are the loads acting upon the bearing pair.
