ASTM D3337 – Standard Test Method for Determining Life and Torque of Lubricating Greases in Small Ball Bearings (Withdrawn 2009)
Description:
Significance and Use
This test method is a screening test to differentiate among the expected life of greases in ball bearings running at high temperatures. If torque is a factor in selection of a grease, the test method provides for measurements at both low (1 r/min) and high (12 000 r/min) speeds.
Scope
1.1 This test method describes a procedure for the determination of grease life and torque in small bearings. Although this test method is not the equivalent of a long-time field-service test, it is intended to predict the relative grease life at high temperature in a reasonable period of testing time. In addition, this test method measures the running torque at both low (1 r/min) and high (12 000 r/min) speeds.
1.2 Except for torque, which is measured in gcm, the values stated in inch-pound units are to be regarded as the standard in this test method. The SI values given in parenthesis are for information only.
ASTM D3336