RKB angular-contact ball bearings support the vertical rotor shaft in dynamic classifiers used in bowl-type coal mills.

The classifier controls coal fineness by separating fine particles from coarse ones.

Two single-row angular-contact ball bearings support the rotor shaft, one at each end. The upper bearing locates the shaft axially and carries thrust, while the lower bearing serves as the floating bearing, allowing axial movement.

RKB has manufactured this custom bearing for many years. It was designed for the demanding operating conditions of dynamic classifiers in bowl-type coal mills.