The ZEN H2316 adapter sleeve is a critical component designed for securely mounting bearings with a tapered bore onto cylindrical shafts. It is suitable for use on both smooth and stepped shafts, offering straightforward installation without requiring additional shaft location. When installed on smooth shafts, the bearing can be positioned anywhere along the shaft. For stepped shafts, when combined with an L-shaped spacer ring, it facilitates precise axial positioning and simplifies both mounting and dismounting procedures. This adapter sleeve features an M80x2 thread and is compatible with various bearing series, including 2316, 22316, 1216, 22216, 1316, and 23216.