Adapter sleeve H3034 transfers load between a cylindrical shaft and a bearing bore machined with a taper, allowing mounting on plain shaft seats without a shoulder. Bore diameter is 150.0 mm, net mass 6.355 kg, standard design, mechanical fixing with a locknut and lockwasher completing the assembly. The tapered fit distributes the clamping force evenly around the bore, so the bearing inner ring is drawn onto the sleeve until the required internal clearance reduction is reached. This mounting method simplifies positioning of the bearing along the shaft and permits axial adjustment before final tightening, which is useful when the exact shaft location is not fixed by a shoulder or step.