This adapter sleeve provides a mechanical means of mounting a bearing with a tapered bore onto a cylindrical shaft, transferring the fit through the tapered sleeve surface rather than requiring a tapered shaft seat. Bore diameter is 150.0 mm, net mass 8.68 kg, standard design, supplied complete as a full accessory set for the mounting arrangement. The tapered outer surface allows axial displacement to generate the correct interference fit and internal clearance on the bearing during mounting, which is set by the amount the sleeve is driven up before locking. This construction suits applications where the shaft is plain and unstepped, letting the bearing position be adjusted axially along the shaft length while still achieving a secure, non-slip fit under load.