Adapter sleeves are widely employed elements for positioning bearings with a tapered bore onto a cylindrical seat, making them suitable for both plain and stepped shafts. Their installation is straightforward, and they don’t necessitate any extra fixation on the shaft. When utilized on plain shafts, the bearing can be situated at any point along the shaft. In the case of stepped shafts, when paired with an L-shaped spacer ring, adapter sleeves enable precise axial positioning of the bearing, simplifying the process of mounting and dismounting the bearing.