Moderate viscosity
When lubricating oil is used under low temperature conditions, the viscosity, viscosity index, and pour point of the lubricating oil are important. According to lubrication theory, an appropriate oil film is the foundation for establishing sufficient oil film thickness.
Oxidative stability
When used continuously or intermittently for a long time, or under high temperature or other conditions that make lubricating oil prone to oxidation and deterioration, it is also very important for lubricating oil to have good oxidation stability and/or thermal stability.
antirust
There is steam or moisture at the work site, such as in industries such as petrochemicals, steel, and papermaking, where machines are easily affected by moisture and rust. In this case, lubricating oil with good rust resistance is needed.
Anti foaming property
A lot of sliding bearings are lubricated with circulating oil or splash lubrication. When the lubricating oil is stirred or circulated in the oil circuit system, some foam will naturally form due to mechanical movement. However, if there is too much foam, it may lead to insufficient oil supply to the bearing and lead to the overflow of lubricating oil from the oil tank.
Oil water separation (anti emulsification)
If a large amount of moisture enters the lubricating oil, it is important that the lubricating oil can resist emulsification and easily separate the moisture.
Extreme pressure property
It is difficult to rely solely on viscosity to maintain sufficient thickness of the oil film and ensure that the lubricating oil is in a liquid state under certain high load and low-speed conditions. This makes the bearings easy to sinter. At this point, it is necessary to add oil-based additives to maintain fuel supply and improve extreme pressure.
