• Learning the technological correlations involved in hydrodynamic lubrication by experimentation.
  • Frictional force in a journal bearing dependent on
    * Materials
    * speed
    * bearing load
    * lubricant and lubricant temperature


  • Unit to investigate basic tribology topics.
  • Radial journal bearing with stainless steel shaft journal and free-moving sintered bronze, Cast Iron and Teflon bearing shells.
  • Three-phase AC motor with variable frequency drive for speed control.
  • Load applied to journal bearing using a sprig balance.
  • Measurement of friction moment achieved through the use of a lever with force gauge.
  • Drip-feed lubrication for continuous lubricantsupply (drip-feed lubricator).
  • Drip tray for leakage oil.
  • Inductive speed sensor.
  • Digital display of speed and also it can be varied by using variable frequency drive.

In this apparatus, a journal bearing study including a stainless steel shaft journal and a free-moving bearing housing made of sintered bronze, cast iron, and Teflon can be carried out. With the use of this equipment, journal bearing tribology phenomena can be studied. The drive is a three-phase AC motor with a variable frequency drive for speed regulation. Using the top tnurled screw and two spring balances, force can be imparted to the bearing. By doing so, the user is able to gauge the friction moment produced in the bearing. The defined load is applied to the bearing by the lever and a set of weights. Both the lubricating gap and the bearing journal are visible. A drip-feed lubricator that distributes oil to the shaft through a lubrication channel provides lubricant. The oil that spills out is collected in a drip tray. On the panel, a digital display shows the temperature of the lubricant as well as the continually adjustable speed. A step-by-step walkthrough of the experiments is provided in the comprehensive training material, which also lays out the principles.