# Equivalent static bearing load

Static loads comprising radial and axial components must be converted into an equivalent static bearing load. This is defined as that hypothetical load (radial for a radial bearing and axial for a thrust bearing) which, when applied, would cause the same maximum rolling element load in the bearing as the actual loads to which the bearing is subjected. It is obtained from the general equation

where
 P0 = equivalent static bearing load [kN] Fr = actual radial bearing load (see below) [kN] Fa = actual axial bearing load (see below) [kN] X0 = radial load factor for the bearing Y0 = axial load factor for the bearing
Information and data required for calculating the equivalent static bearing load is provided in the relevant product sections.
When calculating P0, the maximum load that can occur should be used and its radial and axial components (fig. 1) inserted in the equation above. If a static load acts in different directions on a bearing, the magnitude of these components changes. In these cases, the components of the load with the highest value of the equivalent static bearing load P0 should be used.