HFN5 Journal Friction Apparatus

HFN5 Journal Friction Apparatus

This apparatus is designed to determine the friction torque in a plain journal bearing under varying conditions of load, speed and lubrication.

The ground steel shaft is driven by a variable speed electric motor. The journal housing has a thermometer pocket, a sight feed lubricator and a removable end cover. Oil cannot be thrown out. Friction due to end face contact is very much reduced by the use of a "floating" sleeve.

Friction torque is measured by adding weights to a load hanger suspended from the damped torque arm. Weights added to the lower hanger apply a steady load to the bearing of up to 650N. Phosphor Bronze, sintered bronze and impregnated PTFE sleeves are supplied as standard journal housings.

An electronic tachometer is provided for measurement of the shaft speed, which can be controlled using the control potentiometer on the front control box.

An oil drip tray is provided to ensure all oil passing through the journal bearing is captured.

A full set of weights, hangers and tools is provided along with a comprehensive instruction manual for student and lecturer.

HFN5 Journal Friction Apparatus
  • Determines the friction torque under variable load , speed and lubrication
  • The ground steel shaft driven by a speed controlled motor
  • Journal housing fitted with a thermometer, sight feed lubricator and an end cover to retain oil
  • Friction torque measured by a balance arm with added weights
  • Load applied to the floating journal sleeve through a 4:1 linkage
  • Journal sleeves in phosphor bronze, sintered bronze and impregnated PTFE supplied
  • An electronic tachometer to measure the shaft speed
  • An Instruction manual for student and lecturer provided.
  • Set of weights.
  • Two year warranty

Determination of coefficient of friction between two bearing surfaces under the following conditions: 

  • Dry, no lubrication
  • Lightly lubricated
  • Fully lubricated

To investigate the effect of lubrication on:

  • Journal load
  • Shaft speed
  • Operating temperature
  • Type of lubricant

To establish the relationship between the friction torque and:

  • Journal load
  • Operating temperature
  • Type of Lubricant