Product Name: Self-Aligning Ball Bearings and Roller BearingsModel Number: B31Place of Origin: ChinaSelf-aligning ball bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, inner rings with a cylindrical or tapered bore and ball and cage assemblies. The bearings are available in open and sealed versions, +H200, +H300, +H2300. Series: 108, 12x, 12xx, 135, 13xx, 14xx, 22xx, 23xx Spherical (Self-aligning) roller bearings are used to bear radial load and some axial load, have big radial-load capacity and nice efficiency of self-aligning, widely used in mining machinery, power machinery, heavy machinery and textile machinery etc. Series: 222xx, 223xx, 230xx, 231xx, 240xx, 241xx, 239xx Variation: K, W33