This adapter sleeve mounts a bearing with a tapered bore onto a cylindrical shaft, transferring the clamping force generated by the locknut into a uniform grip along the seating surface. Bore diameter is 160.0 mm, net mass 11.767 kg, standard design, without an integrated locknut or lockwasher supplied as separate items in this listing. The sleeve allows axial positioning of the bearing anywhere along the shaft length, which simplifies mounting compared with a bearing fitted directly on a tapered shaft seat. Fitting the mating bearing at the correct interference requires checking the radial internal clearance reduction during drive-up, so the reduction value specified for the paired bearing should be respected to avoid excessive preload. No interchange designations from other manufacturers are given for this item.