The development condition of constant velocity joint grease,wheel bearing grease,electrical installation bearing grease and electrical contactor grease are intro- duced.
The aviation main shaft bearing usually works under the condition of high speed and high temperature.
发动机主轴轴承常常在高速条件和高温环境下工作。
The main shaft bearings of aircraft engine are key parts of plane, its reliability and life affect directly on the reliability and life of engine and even whole plane.