This 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 rather than only at a shaft shoulder. The bore diameter is 70.0 mm and the sleeve has a net mass of 1.3 kg, in standard design, matched to the taper of the corresponding tapered-bore bearing. Tightening the sleeve nut drives the sleeve into the tapered bore, expanding the inner ring and setting the internal clearance of the bearing during mounting rather than through a fixed fit tolerance on the shaft. This makes the arrangement suited to plain, unstepped shafts where axial positioning of the bearing must be adjustable and where the mounting clearance is controlled by the amount of drive-up rather than by shaft machining tolerances.