This adapter sleeve provides a mechanical connection between a bearing with a tapered bore and a plain cylindrical shaft, allowing the bearing to be mounted at any point along the shaft length without requiring a stepped or shouldered seat. It has a bore diameter of 90.0 mm and a net mass of 1.76 kg, corresponding to the standard design (H320) of the FAG accessory range for rolling bearings. Tightening the sleeve draws the bearing inner ring onto the taper, generating a controlled radial interference fit that removes internal clearance progressively as the locknut is tensioned. This mounting method simplifies bearing removal for maintenance, since the sleeve and bearing can be drawn off the shaft together, and it accommodates minor shaft diameter tolerances without the need for precision ground shaft seats.