Adapter sleeve and withdrawal sleeve arethe most commonly used bearing accessories. Adapter sleeve is used to fix thetapered hole bearing on a cylindrical shaft neck, which can be an optical shaftor a stepped shaft. When using adapter sleeve on the optical axis, the bearingcan be fixed at any position on the shaft. When used on a stepped shaft, whenpaired with a stepped ring, the bearing can be more accurately fixed at thegiven

position on the shaft, and disassembly isrelatively convenient.

Withdrawal sleeve is mainly used to fix thetapered hole bearing on the cylindrical shaft neck of the stepped shaft.Withdrawal sleeve is pressed between the tapered hole bearingagainst the shaftshoulder or similar device and the shaft, and then fixed on the shaft with a nut or end plate. Due to the fact that the threads at the end ofthe shaft can have different sizes according to actual applications, lockingnuts or end plates are not supplied with withdrawal sleeves. The bearing can befixed on the shaft by pressing the release sleeve between the bearing and theshaft. Therefore, when installing larger bearingsa significant amount of forceis required to overcome them.The friction between the mating surface ofthe bearing and withdrawal sleeve. The use of hydraulic nuts makes it easierand more convenient to install and remove bearings on the sleeve.