This adapter sleeve provides a mechanical fit between a bearing with a tapered bore and a plain cylindrical shaft, allowing the bearing to be mounted at any point along the shaft without a machined shoulder or step. It has a bore diameter of 100.0 mm, a net mass of 2.3 kg, and a standard design. The sleeve is a complete, mechanical accessory component, designated H322. Because the sleeve compensates for the tapered bore of the bearing, it allows secure clamping onto the shaft while enabling axial adjustment during installation. This makes it suitable for applications where the bearing needs to be positioned freely along a smooth shaft rather than fixed at a specific shoulder, simplifying mounting and dismounting of the bearing assembly.