EN logo ZKL Group

Basic dynamic load rating is a constant invariable load which the bearing can theoretically carry at the nominal life of one million revolutions. 

For radial bearings, the radial dynamic load rating C_r refers to constant load. For thrust bearings, the axial dynamic load rating C_arefers to unvariable, purely axial load, acting centrically.

Basic dynamic load ratings C_r and C_a, whose size depends on bearing dimensions, rolling element number, material and bearing design, are shown for each bearing in the dimension tables. Values of the basic dynamic load ratings were stated according to the standard STN ISO 281. These values are verified in testing equipments and by operation results.