4.1 This test method is used to determine the equilibrium rate of wear and coefficient of friction of materials in rubbing contact under useful operating conditions, that is, combinations of pressure and velocity that fall below the PV (pressure8201;×8201;velocity) limit of the test material. The user of this test method should determine to his own satisfaction whether the results of this test procedure correlate with field performance or other bench test machines. If the test conditions are changed, the wear rates may change and the relative value of one material with respect to another may also change.
4.2 Test conditions may be selected from Table 1.
TABLE 1 Test ConditionsA
| Rotational | Rubbing Velocity, | Load, lb (kg), to Obtain PV, psi8201;×8201;ft/min (kg/cm 28201;×8201;m/min) at Selected Speeds | |||
| PV1 1250 (26.8) | PV2 2500 (53.6) | PV3 5000 (107.1) |
| ||