Spherical roller bearings have double-row rollers, with a common spherical raceway in the outer ring and 2 raceways in the inner ring and inclined at an angle relative to the bearing. This simplified structure makes it self-aligning. In addition to bearing stress loads, the bearing can withstand a two-way shaft. Therefore, the bearing is not susceptible to the influence of the angle between the shaft and the bearing housing on the error or the bending of the shaft, and is suitable for the influence of the installation error or the bending of the shaft. In addition to being able to withstand radial loads, this bearing can also withstand axial loads acting in both directions.

Spherical roller bearings have two inner holes for insertion and conical. The  conical cone hole of  taper is 1:30 and 1:12. This conical inner hole bearing is equipped with an adapter sleeve or a withdrawal sleeve, that is the self-aligning ball bearing with tapered inner hole can be conveniently and quickly assembled on the optical axis or stepped machine axis.