Structure & introduction
Thrust Needle Roller and Cage Assemblies
Overview Thrust needle roller and cage assemblies are complements of small diameter needle rollers arranged in a spoke-like configuration. Needle rollers are equally spaced by means of a cage, its web section separates the rollers and provides guidance to keep them tracking in an orbital path. The purpose of these assemblies is to transmit a thrust load between two relatively rotating objects while greatly reducing friction.
Thrust needle roller and cage assemblies also can be unitized with lipped washers to serve as raceway surfaces for the needle rollers. Washers can be supplied separately or can be mechanically unitized to the thrust needle roller and cage assemblies for ease of handling. Catalogue range: 5 mm ? 240 mm (0.1969 in ? 9.4488 in). Markets: Automotive automatic and manual transmissions, automotive accessories (compressors, steering gears, etc.) agricultural and construction equipment. Features: One-way fool-proof assembly features, anti-rotation locking features and lubrication flow enhancements.
Benefits: High-speed performance and application flexibility.
LOAD RATINGS
MINIMUM AXIAL LOAD
Slippage can occur if the applied axial load is too light and the operating speed of the thrust needle roller and cage assembly is high ? particularly if accompanied by inadequate lubrication. For satisfactory operation, a certain minimum load must be applied to a thrust needle roller and cage assembly which can be calculated from: Fa min = C0a/2200 [KN]
Where: C0a = static load rating [KN] Fa min = minimum axial load [KN]
LUBRICATION
Oil is the preferred lubricant for thrust needle roller and cage assemblies and an ample oil flow is absolutely necessary for high speeds or for moderate speeds when the load is relatively high.
SPECIAL DESIGNS
Thrust needle roller and cage assemblies and thru