This adapter sleeve mounts a bearing with a tapered bore onto a cylindrical shaft, transferring the clamping force through the sleeve's tapered outer surface when the locking nut is tightened. Bore diameter is 45.0 mm, net mass 305.72 g, standard design, FAG symbol H310. The sleeve allows axial positioning of the bearing along the shaft and eliminates the need for a shaft shoulder or precise shaft tolerance, since the fit is achieved by controlled displacement of the sleeve during mounting. Being a mechanical, complete accessory component, it is used together with a matching tapered-bore bearing and locking nut, with correct drive-up checked by measuring the reduction in bearing internal clearance or by axial displacement during installation.