Table 4 provides common examples of lubrication oil grades based on oil temperature, bearing speed, and applied load. As shown, heavier oil grades are needed for higher operating temperatures, lower bearing speeds, and/or higher loads. Operating Temperature -30 to 0° C (-22 to 32° 0 to 50° F) C (32 to 122° 50 to 80° F) C (122 to 176° 80 to 110° F) C (176 to 230° F) TABLE 4: EXAMPLES OF SELECTION OF LUBRICATING OILS Speed Light or Normal Load less than limiting speed less than 50% of limiting speed 50 to 100% of limiting speed more than limiting speed less than 50% of limiting speed 50 to 100% of limiting speed more than limiting speed less than 50% of limiting speed 50 to 100% of limiting speed more than limiting speed ISO VG 15, 22, 32 (refrigerating machine oil) ISO VG 32, 46, 68 (bearing oil, turbine oil) ISO VG 15, 22, 32 (bearing oil, turbine oil) ISO VG 10, 15, 22 (bearing oil) ISO VG 100, 150, 220 (bearing oil) ISO VG 46, 68, 100 (bearing oil, turbine oil) ISO VG 32, 46, 68 (bearing oil, turbine oil) ISO VG 320, 460 (bearing oil) ISO VG 150, 220 (bearing oil) ISO VG 68, 100 (bearing oil, turbine oil) Heavy or Shock Load - ISO VG 46, 68, 100 (bearing oil, turbine oil) ISO VG 22, 32, 46 (bearing oil, turbine oil) - ISO VG 150, 220, 320 (bearing oil) ISO VG 68, 100, 150 (bearing oil, turbine oil) - ISO VG 460, 680 (bearing oil, gear oil) ISO VG 220, 320 (bearing oil) - Remarks: 1. For the limiting speed, use the values listed in the bearing tables. 2. Refer to Refrigerating Machine Oils (JIS K 2211), Bearing Oils (JIS K 2239), Turbine Oils (JIS K2213), Gear Oils (JIS K 2219). 3. If the operating temperature is near the high end of the temperature range listed in the left column, select a high viscosity oil. 4. If the operating temperature is lower than -30°C (-22°F) or higher than 110°C (176°F), it is advisable to consult your in-house engineer or a third-party specialist like Motion. Lubrication – Optimizing Bearing Life - continued 33
