What is the designation of industrial lubricating oil?
1 Answers
Industrial lubricating oil designations are based on the viscosity classification method of the Society of Automotive Engineers (SAE). This is a viscosity grade classification method that divides lubricating oils into high-temperature types for summer use, low-temperature types for winter use, and all-season types suitable for both winter and summer. Meaning of the designations: Winter oil grades are: 0W, 5W, 10W, 15W, 20W, 25W. The symbol W stands for Winter, and the smaller the number before W, the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature. Summer oil grades are: 20, 30, 40, 50. The larger the number, the higher the viscosity and the higher the applicable maximum temperature. All-season oil grades are: 5W-20, 5W-30, 5W-40, 5W-50, 10W-20, 10W-30, 10W-40, 10W-50, 15W-20, 15W-30, 15W-40, 15W-50, 20W-20, 20W-30, 20W-40, 20W-50. The smaller the number representing the winter part, the lower the viscosity; the larger the number representing the summer part, the higher the viscosity, and the wider the applicable temperature range. Industrial lubricating oils can be classified into the following categories: Industrial lubricating oils can be roughly divided into lubricating oils, process oils, greases, and specialty oils. Lubricating oils can be further divided into hydraulic oils, industrial gear oils, machine oils, refrigeration oils, transformer oils, heat transfer oils, turbine oils, internal combustion engine oils, air compressor oils, etc. Greases, also known as butter, have a more complex classification, generally including lithium-based greases, calcium-based greases, food-grade greases, and many others. Specialty oils can be basically divided into cutting fluids, drawing oils, rust preventive oils, quenching oils, etc.
