Gear oil to petroleum lubricant base oil or synthetic lubricant-based, adding extreme pressure anti-wear agents and oily agent modulation and become an important lubricant.
Used in a variety of gear transmission devices to prevent tooth wear, abrasion, sintering, etc., to extend its service life and improve the transfer of power efficiency. Gear oil should have good anti-wear, load resistance and suitable viscosity. In addition, it should also have good thermal and oxidative stability, anti-foaming, water separation performance and anti-rust properties. As the gear load is generally in 490 MPa (MPa) or more, and hyperbolic tooth load is higher than 2942 MPa, in order to prevent the oil film rupture caused by tooth wear and abrasion, in the gear oil is often added to the extreme pressure anti-wear agents, commonly used sulfur - phosphorus or sulfur - phosphorus - nitrogen type additives.