1. Good abrasion resistance
Wear resistance refers to the ability of the reducer lubricating oil to form and maintain an oil film on the friction surface between moving parts, prevent metal contact with each other, and reduce wear. The anti-wear properties of reducer lubricants mainly depend on oil properties and extreme pressure (shear resistance). Oiliness refers to the performance of gear oil that can be adsorbed on the friction surface of the part to form an oil film to reduce friction and wear. Generally speaking, when we say that gear oil has good oiliness, it means that it has strong adsorption capacity and can improve the ability of wear resistance. Extreme pressure refers to the ability to prevent sintering and bonding damage to the friction surface under extremely high pressure lubrication conditions where the friction surface contact pressure is very high and the oil film is prone to rupture. It is also called bearing capacity.
2. Viscosity and viscosity-temperature
Reducer lubricating oil must have suitable viscosity and good viscosity-temperature properties. Generally speaking, the use of high-viscosity lubricating oil is beneficial to prevent damage to mechanical parts and reduce noise. However, transmission efficiency, cooling effect and oil transmission are not Low viscosity lubricating oil is better. Regarding viscosity-temperature performance, although reducer lubricating oil does not have the large temperature change of engine oil, it also requires good viscosity-temperature performance due to the high pressure on the tooth surface, especially when used in cold areas. Otherwise, wear will increase and fuel consumption will increase.
3. Oxidation stability
The lubricating oil of the reducer is agitated during the movement of the gear and continuously contacts with oxygen. Under the catalysis of the metal, various oxides are formed, which makes the viscosity of the lubricating oil increase, the color becomes darker, the acid value increases, and the precipitation increases. The color becomes darker and causes corrosion to the machine parts, resulting in the deterioration of the anti-foaming and oxidation stability of the lubricant, and the lubricant has to be replaced. Lubricants with good oxidation stability have a long service life. Therefore, usually lubricating oil can improve oxidation stability.
4. Rust and corrosion resistance
The anti-rust property refers to the performance of the reducer lubricant to prevent metal corrosion. Corrosion resistance refers to the performance of gear oils to prevent metal corrosion. The rust of metal parts is mainly caused by the presence of oxygen and water in the lubricant. The corrosion is caused by acid and sulfide in the oil. Usually, anti-rust additives and anti-corrosion additives are added to reducer lubricating oil to improve.
5. Foam resistance
The lubricating oil of the reducer will produce many small bubbles under the intense stirring during the gear movement. If the small bubbles disappear quickly, it will not affect the use. If the stable foam does not disappear and emulsification occurs, overflow will occur on the tooth surface, destroy the lubricant film, and increase wear.