The aligning roller bearing is between the inner ring with two raceways and the outer ring with spherical raceways. The curvature center of the outer ring raceway surface is consistent with the bearing center, so it has the same central function as the automatic aligning ball bearing. When deflection of shaft or housing appears, it can be adjusted automatically without increasing bearing burden. The roller bearing can bear radial load and axial load in two directions. The radial load capacity is large, which is suitable for heavy load and impact load. The inner diameter of the inner ring is the bearing of the taper hole, which can be directly installed. Or use the tightener sleeve and disassembly cylinder to install on the cylinder shaft. The cage is made of sheet metal stamping, polyamide forming and copper alloy car.