The fatigue load limit is calculated according (ISO 281, 2007) section B.3.2.1.2 for ball bearings and according section B.3.2.1.3 for roller bearings. For roller bearings, the standard calculation according ISO/TS 16281 is used, not the extended method for pressure distribution.
The fatigue load limit is based on fatigue strength of 1500MPa and it is used for the calculation of modified life. The fatigue strength can be modified using inputs for material data.
