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This Koyo Torrington TR-series thrust roller bearing washer is designed for use with Koyo NTA-series thrust needle roller and cage assemblies in applications where adjacent components cannot serve as raceways. This thrust washer serves as a raceway surface for the thrust assembly’s rolling elements and can be used as a shaft washer (bore-piloting washer) fixed on the shaft or a housing washer (outer diameter-piloting washer) fixed in the housing. Both sides of the washer can be used as raceways and are flush ground for higher speeds and greater running accuracy than unground raceways. The washer is made of low alloy, through-hardened chromium steel for durability, heat tolerance, and resistance to deformity under heavy loads. This thrust washer is 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.
Koyo Bearings USA manufactures bearings, bearing assemblies, and needle rollers for automotive and industrial applications. The company, founded in 2009 and headquartered in Canton, OH, meets International Organization for Standardization Technical Specification (ISO/TS) standard 16949 and ISO standard 14001.
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