Taper roller bearings have tapered inner and outer ring raceways between which tapered rollers are arranged.Their design makes taper roller bearings particularly suitable for the accommodation of combined (radial and axial) loads. SKF single row taper roller bearings are fitted with a pressed window-type steel cage, roller centred. The resulting benefits include increased operational reliability and reduced sensitivity to misalignment. Q Optimized contact geometry and surface finish J Pressed window-type steel cage, roller centred. A figure following the J indicates a different cage design CL7C High-performance design for pinion bearing arrangements X Boundary dimensions changed to conform to ISO