This adapter sleeve provides a mechanical mounting interface between a bearing with a tapered bore and a plain cylindrical shaft. It has a bore diameter of 60.0 mm and a net mass of 0.74 kg, built to standard design. The sleeve transmits the clamping force generated when the locknut is tightened, drawing the bearing up the taper to achieve the correct internal fit. Using an adapter sleeve simplifies mounting and dismounting on plain shafting, since the bearing does not need a shoulder or stepped shaft seat. The clamping action allows for adjustment of internal clearance during installation, which is relevant for self-aligning bearing types commonly mounted this way. Correct fit-up depends on measuring the reduction in radial internal clearance as the sleeve is driven onto the shaft.