UNI 10196:1993 test method covers the determination of wear rate and coefficient of friction for self-lubricated materials in rubbing contact by a testing machine2 that utilizes a thrust washer specimen configuration. 

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 (pressure × 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.

Pressure (P) and Velocity (V) are two key determinants of performance for a dynamic load-bearing component. P is the load on the component and measured in MPa or psi units; V is the velocity or speed at which the mating surfaces are in contact, measured in units of length over time; e.g., cm or feet / minute. This testing is typically done on a thrust washer set-up as shown in Figure.

• V is calculated by multiplying Pressure x Velocity to which the material is exposed. The combination of these variables creates frictional heat at the mating surface of the sample. When the PV exceeds a material’s capability, the heat generated can cause failure of the load bearing component.

  
  

• Limiting PV defines the maximum PV that a material can withstand with no lubrication at the mating surfaces. When the actual PV that occurs under operating conditions exceeds the plastic’s Limiting PV, the material will likely fail due to surface melting or excessive wear.

Beijing United Test Co.,Ltd. export@unitedtest.com offer the UNI 10196:1993 Friction and Wear Test Machine measure wear Rate and Coefficient of Friction . Contact us now : export@unitedtest.com, unitedtest@hotmail.com