This adapter sleeve provides a mechanical mounting interface between a bearing with a tapered bore and a cylindrical shaft. The bore diameter is 80.0 mm, and the sleeve has a net mass of 1.23 kg, produced in the Standard design. It is supplied as a complete accessory component, mechanical (FP), ready to fit directly onto the shaft and bearing bore. The tapered design of the sleeve allows the bearing to be drawn onto a plain cylindrical shaft, generating the necessary internal fit and clamping force during mounting without requiring a stepped or shouldered shaft. This makes it suitable for mounting locations where axial positioning on the shaft needs to be adjustable, and where the bearing's inner ring must be secured firmly through the taper interface rather than through a press fit alone. Correct tightening and axial displacement during assembly are required to achieve the specified internal clearance reduction of the mounted bearing.