The use of lubricants - gear oil

2018-12-21 23:03:28

Lubricating oils used in transmissions and rear axle gear trains are generally called gear oils. The axes of the gears are different from each other in terms of the position and the tooth profile, and the contact stress and the relative slip speed of the meshing portions of the tooth surfaces are greatly different. Therefore, it is required to use different types and types of gear oils. (1) Classification of gear oil The old classification of gear oil in China is classified according to the former Soviet Union. Ordinary gear oils are divided into 20, 26, 30 and 3 grades according to the 100 degree kinematic viscosity. Hyperbolic gear oil is divided into four grades 18, 22, 26 and 28 according to the 100 degree kinematic viscosity. Now China is divided into three categories according to quality: General vehicle gear oil (CLC), medium-duty vehicle gear oil (CLD), heavy-duty vehicle gear oil (CLE). 1 Ordinary vehicle gear oil. Suitable for medium-load and speed, more demanding manual transmissions and drive axles for helical bevel gears. According to the different viscosity is divided into 80W/90,85W/90,90 three specifications. Oils of size 90 in the area south of the Yangtze River can be used throughout the year. 2 medium-load vehicle gear oil. Suitable for gears that operate at low speeds and high torques, high speeds and low torques, and drive axles that use less quasi-hyperbolic gears. There are 75W, 80W/90, 85W/90, 90, 85W/40 five different specifications according to the viscosity. The 90th specification oil can be used throughout the year in the area south of the Yangtze River. 3 heavy-duty vehicle gear oil. Suitable for all kinds of gears working under high-speed impact load, high speed and low torque, low speed and high torque, and axles with moderate or harsh quasi-hyperbolic gears. According to the viscosity, there are 75W, 80W/90, 85W/90, 90, 85W/40 five specifications. (2) Use of gear oil According to the instruction manual, select the appropriate gear oil, note that the hyperbolic gear cannot be used for ordinary vehicle gear oil; regular replacement of gear oil by quality; replacement of gear oil should dissipate old oil on the handlebar and use diesel oil Wash gears and gearboxes; it is best to use high-grade gear oils during the run-in period and then replace them with common gear oils.

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