This adapter sleeve provides a mechanical connection between a bearing with a tapered bore and a cylindrical shaft, allowing the bearing to be mounted at any position along the shaft length. It has a bore diameter of 115.0 mm and a net mass of 3.82 kg, supplied as a complete unit in standard design. The tapered outer surface of the sleeve draws the bearing inner ring into a fixed radial position as the locknut is tightened, setting the correct internal clearance during mounting. This design simplifies installation and removal on plain shafts without steps or shoulders, and is suited for applications where the bearing must be positioned precisely and dismounted without damaging the shaft surface.