Adapter sleeves and withdrawal sleeves are generally suitable for large bearings. The adapter sleeve is used to tighten the round nut and tighten the bearing, and the withdrawal sleeve is used in the opposite direction.

The original intention of adapter sleeves and withdrawal sleeves is to facilitate the installation and removal of bearings, improve efficiency, and reduce mechanical maintenance costs. In layman's terms, for the convenience of installation, use the adapter sleeve, and for the convenience of disassembly, use the withdrawal sleeve. And the use of withdrawal sleeves and adapter sleeves can achieve the effect of adjusting the internal clearance.

The adapter sleeve is convenient for adjusting the axial positioning of the bearing and has good self-locking properties. The use of an optical shaft avoids the stress concentration in the stepped shaft, which is beneficial to heavy-load transmission or applications with shock and vibration.