In the past, we were talking about engine oil. You may have a good understanding of the engine and will take care of your engine. But to make your car run fast and well, it's not enough to rely on a good engine alone. The engine only provides enough power. How to transmit its power to the wheels? It must rely on the help of gearboxes and drive axles.
The purpose of the gearbox and drive axle is to obtain the power and initial speed from the engine. According to the needs of the driver, after changing the speed and increasing the axle torque, you can get the required speed. If the gear box is not working, then you It is impossible to get a satisfactory speed, or the life of gears may be reduced, so choosing the right lubricant for your gearbox and axle is really important.
First look at the role of gear oil, it should have the following two roles:
(1) Lubricate gears and bearings to prevent wear and rust.
(2) To help heat the gears.
Gear lubricants should have the following characteristics:
(1) Appropriate and strong oil film can be formed on gears.
(2) It has good oxidation resistance and is not easily deteriorated.
(3) High viscosity index is favorable for starting at low temperature.
(4) Excellent anti-corrosion and anti-rust properties.
In terms of gear oil viscosity, the SAE of the American Society of Automotive Engineers has classified the viscosity of vehicle's gear oil into 7 grades. SAE 75W/90 viscosity grades are commonly used in cars or minibuses, and SAE 85W/140 viscosity is used in large trucks and heavy-duty vehicles. SAE 85W/90 viscous gear oil can be used throughout most of the country, and SAE 75W/90 viscosity grade gear oil can be used in winter in the cold northeast, and SAE90, SAE85W/140 and SAE140 viscosity grades can be used in summer and heavy load vehicle conditions.
Careful friends may ask, gear oil viscosity level is not much higher than the viscosity of the engine oil? In fact, SAE ranks the viscosity grades of engine oil and gear oil separately. In terms of actual viscosity, the viscosity of gear oil is only equivalent to the viscosity of engine oil SAE 40 or 50. In industrial applications, the viscosity of lubricating oils is generally graded in accordance with ISO viscosity standards. Therefore, the viscosity of lubricating oil cannot be judged simply by the SAE's numerical grade, and their uses, types, viscosity classification standards, methods for checking viscosity, and test temperatures are the same. For example, SAE test viscosity is 100°C kinematic viscosity of oils. The ISO test viscosity is the kinematic viscosity of the oil at 40°C.
In terms of quality, the American Petroleum Institute (API) classifies automotive gear oils into GL-1 through GL-5. "GL" stands for gear oil. The larger the number behind GL, the higher the load level. The two commonly used are GL-4 and GL-5. Gear oils that meet GL-5 have more gear oil than GL-4. Good resistance to impact loads and better performance. Because the current domestic vehicles are mostly operated under overloaded and intense working conditions, the load on the gear oil is very high, so it is recommended that users should use the higher grade GL-5 gear oil as well. When selecting gear oil, the user can use gear oil produced by a large scale lubricant factory. The quality of gear oil produced by these manufacturers is still very assured.
Die Cast Car,Custom Die Cast Parts,Die Casting For Car,Auto Aluminum Die Parts
Shandong Newels International Co., Ltd , https://www.newelsindustrial.com