The ASTM/ISO viscosity grades for industrial bearing oils are described below. Figure 13. Viscosity grades for industrial lubricants. ISO Viscosity System Conventional Anti-Rust and Anti-Oxidation Lubricants Conventional anti-rust and anti-oxidation (Ru0026O) oils are the most common industrial lubricants. These lubricants can be used in Timken bearings used in a variety of industrial applications without special conditions. Table 24. Recommended Properties of Conventional Ru0026O Lubricants Base Stock Refined High Viscosity Index Petroleum Additives Anti-Corrosion and Antioxidant Viscosity Index Min 80 Pour Point Max -10C Viscosity Grade ISO/ASTM 32 to 220 Some Low Speed u200bu200band/or High Environment Temperature applications require higher viscosity grades. High speed and/or low temperature applications require lower viscosity grades. Extreme Pressure (EP) Industrial Gear Oils Extreme pressure gear oils lubricate Timken bearings in most heavy-duty industrial equipment. They are capable of withstanding the unusual shock loads commonly found in heavy duty equipment. Table 25. Recommended Industrial EP Gear Oil Properties Properties Base Stock Refined High Viscosity Index Petroleum Additives Anti-Corrosion and Antioxidant, Extreme Pressure (EP) Additives(1) Load Rating 15.8 kg Viscosity Index Min 80 Pour Point Max -10C Viscosity Grades ISO/ASTM 100, 150, 220, 320, 4601) ASTM D 2782 Industrial Extreme Pressure (EP) Gear Oils consist of highly refined petroleum oils plus appropriate depressant additives. They should not contain materials that could corrode or erode the bearings. The inhibitor should provide long-term oxidation protection and protect the bearing from corrosion in the presence of moisture. The lubricating oil should be able to avoid foaming in use and have good water-repellent properties. Extreme pressure additives also prevent galling under boundary lubrication conditions. There is a wide range of recommended viscosity grades. High temperature and/or low speed applications typically require higher viscosity grades. Low temperature and/or high speed applications require lower viscosity grades.