TourTourLPV-Limiting pressure velocity
The LPV-Tribometer is designed to measure the load capacity (LPV-value), friction, stribeck curves and wear of journal bearings. The ingenious design is based on two displacement devices which enables high accuracy measurement of all parameters listed.
 Procedure for LPV measurement
  • The shaft speed is adjusted at 0.05, 0.5 m/s or 5 m/s.
  • The load is during the test continue increased.
  • Friction and temperature are monitored continuously.
  • The maximum load is achieved if the friction suddenly increase, indication for melting.


  • Click here for a drawing of the specimens.
  • The housing of the bearings are standard  (aluminum ring °60 mm).
  • Different measures of the bearing / house combinations are possible.
  • Both half as complete bearings can be tested. (see complete bronze and half aluminum bearing at the picture).
  • The shaft bushing from bearing steel is a standard rolling bearing component.


Test rig
Number of revs:

The shaft speed can be adjusted in the range from 0 to 5000 rpm. In combination with the shaft diameter of 20 mm a speed up to 5 m/s can be obtained.

Bearing load:

The load is subjected to the aluminum bearing house by dead weight. To increase the load in time it is possible to use a pneumatic cylinder. The load can be varied between 10 N en 10 kN.

Bearing temperature:

The bearing temperature is measured by means of a thermocouple in contact with the bearing bushing.








Equilibrium exists between the friction force and the weight subjected to a crank.

The move of the crank, measured by two tasters is a value for the friction. The coefficient of friction is related by Á=Fw/F=sin°ĚL/R.