Adapter sleeve H317 transfers load between a shaft with plain cylindrical seating and a bearing with a tapered bore, allowing the bearing to be mounted at any position along the shaft rather than at a fixed shoulder. The bore diameter is 75.0 mm and the net mass is 1.52 kg, standard design, with mechanical fixing achieved through the tapered fit and locking nut. This construction lets the assembly compensate for shaft tolerances and simplifies mounting and dismounting, since the bearing is drawn onto the sleeve rather than pressed directly onto the shaft. It suits applications where a self-aligning spherical bearing is fitted on a plain shaft and where axial positioning flexibility during assembly is required.