The self-adjusting bearing has a double roller, the outer ring has 1 common spherical surface roller, and the inner ring has 2 rollers that are inclined at an angle relative to the bearing axis. 

This kind of clever structure makes it have automatic heart adjustment, so it is not easily affected by the error of the angle of the shaft and the bearing box or the bending of the shaft.

There are two types of cylindrical bores, conical bores with 1:30 and 1:12 internal holes. 

This kind of cylindrical bores can be fitted with a tight-fitting set or a retractable set, so that the tapered inner holes can be conveniently and quickly assembled on the light shaft or ladder machine shaft.