Machine oils are mainly divided into two categories: general-purpose machine oils and special-purpose machine oils. They can also be further subdivided according to application scenarios and performance, such as high-speed machine oils and ordinary machine oils.
General-purpose Machine Oils
Also simply called machine oils, are mainly used for lubricating light-load machinery such as machine tools, small motors, fans, water pumps, and lifting equipment. They are made from refined mineral base oils and usually contain little or no antioxidants. They are suitable for manual lubrication devices, oil baths, oil rings, and other single-use lubrication systems operating at temperatures below 60℃. According to the national standard GB 443-1989, they are classified by kinematic viscosity at 50℃, such as the common No. 32 and No. 46 machine oils. Currently, the "machine oil" classification has been abolished in the new standard; refer to the L-AN category for total loss systems when selecting oils.
Special-purpose Machine Oils
Are designed for specific equipment and include instrument oils, precision instrument oils, axle oils, sewing machine oils, rolling mill oils, etc., used in precision or special-purpose machinery with high lubrication requirements.
Classification by Usage Characteristics
High-speed machine oil: Suitable for high-speed rotating parts such as spindles in textile machinery, possessing good thermal stability and oxidation resistance.
General machine oil: Used in general industrial equipment, such as ordinary machine tools and woodworking machinery, under lighter loads and at lower speeds.
