The cylindrical bore spherical roller bearing has two rows of spherical rollers, the outer ring has a common concave spherical raceway, the inner ring has two concave raceways inclined at an angle to the bearing axis, and the curvature center and bearing of the outer ring raceway The center is consistent. The cylindrical bore spherical roller bearing is self-aligning and is not affected by the misalignment of the shaft and the bearing housing or the deflection of the shaft deformation, which can compensate for the concentricity error caused thereby. In addition to bearing radial load, this type of bearing can also bear two-way axial load and its combined load, and has large bearing capacity, and has good anti-vibration and anti-impact ability. Cylindrical spherical roller bearings are mainly used in various mechanical equipments in steel, mining, paper, ship, textile machinery, coal mills, electric power, etc. They are the most widely used type of bearings in the machinery industry.