Adapter sleeve is one of the commonly used SKF bearing accessories. It is the most commonly used component when positioning bearings with tapered holes on cylindrical shafts, because this sleeve can be used for optical shafts or stepped shafts. Many people may not have a good understanding of adapter sleeves. Today, I will tell you how to install the bearings correctly. What is the difference between an adapter sleeve and a withdrawal sleeve? How to install the bearing correctly? Preparations before installation. Before installing the bearing, clean the installation surface of the adapter sleeve and withdrawal sleeve carefully. There should be no sharp corners or burrs. If there are protrusions, they should be polished with professional sandpaper in time to avoid bearings and shafts. The mutual wear between them affects the assembly accuracy, and all friction surfaces passing through the shaft must be greased.