This SKF U2-series thrust ball bearing seating washer is designed for use with SKF 532-and 542-series thrust ball bearings with sphered housing washers. The seating washer, in conjunction with the sphered housing washer, compensates for initial static angular misalignments between the support surfaces on the shaft and in the housing in applications subject to shaft deflections or misalignments. The washer is made of through-hardened carbon-chromium steel for durability, heat tolerance, and resistance to deformity under heavy loads. This seating washer is manufactured to PN (normal) tolerances in accordance with International Organization for Standardization (ISO) 199:1997, and it is suitable for use in various applications including machine tool drive shafts, automotive steering gears and clutches, rotary tables, outboard motor propellers, and household appliances.
Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.
SKF Group manufactures bearings and units, seals, mechatronics, and lubrication systems that meet International Organization for Standardization (ISO) 14001 and 9001, and Occupational Health and Safety Assessment Series (OHSAS) 18001 standards for quality assurance. The company, founded in 1907, is headquartered in Göteborg, Sweden.