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 Products:  Engineering Mechanics and Machine Elements » Fundamentals of Engineering Design » Bearings & Tribology » TM 282
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TM 282: Journal Bearing Friction Apparatus

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Journal Bearing Friction Apparatus

Journal Bearing Friction Apparatus Journal Bearing Friction Apparatus

Product Details

Technical Description 
The basic tribological phenomena of journal bearings can be investigated using this unit. The journal bearing to be investigated consists of a stainless steel bearing journal and the free-moving gunmetal bearing housing. A three-phase AC motor with a frequency converter for speed control serves as the drive. A lever with a sliding weight attached to it is connected to the bearing housing. This enables an external moment to be set corresponding to the friction moment generated in the bearing. Another lever, combined with a set of weights, applies the defined load to the bearing. It is possible to view the bearing journal and the lubrication gap through the transparent cover. Lubricant is supplied by a wick oiler that feeds oil to the shaft via two lubrication channels. A drip tray collects the oil that leaks out. The continuously adjustable speed, as well as the temeperature of the lubricant, is indicated digitally on the control unit.
The well-structured instructional material outlines the fundamentals of the theory and provides a step-by-step guide through the experiments.  
Learning Objectives / Experiments

- Learning the technological correlations involved in
  hydrodynamic lubrication by experimentation
- Frictional force in a journal bearing dependent on
  + speed
  + bearing load
  + lubricant and lubricant temperature

* Learning the fundamentals of hydrodynamic
  lubrication by experimentation1
* Journal bearing friction1
* Control unit with electronic speed control and digital
  display of speed and lubricant temperature


[1] Unit to investigate basic tribological topics
[2] Radial journal bearing with stainless steel shaft journal and free-moving bronze bearing shells
[3] Three-phase AC motor with frequency converter for speed control
[4] Load applied to journal bearing using a mechanical lever, transmission ratio 5:1
[5] Measurement of friction moment acheived through the use of a lever with sliding weight
[6] Balance weight to compensate for the intrinsic weight of the measuring set-up
[7] Drip lubrication for continuous lubricant supply (wick oiler)
[8] Drip tray for leakage oil
[9] Inductive speed sensor
[10] Thermocouple for oil temperature measurement
[11] Control housing with digital displays for oil temperature and speed, also allows speed to be varied
Technical Data
Journal bearing
- bearing journal diameter: d=30mm
- bearing width: 45mm
- friction pairing: steel / bronze
- bearing load: max. 525N
- friction moment: max. 295Nmm
Three-phase AC motor
- power output: 0.37kW
Oil viscosity class: ISO VG 100
Measuring ranges
- temperature: -50...200°C
- speed: 0...3000rpm
- 1x 50N, 1x 20N, 2x 10N, 2x 5N, 1x 25N intrinsic
  weight of load unit
- 1x 1N sliding weight

Dimensions and Weight
l x w x h : 600 x 400 x 250 mm (experimental unit)
l x w x h : 360 x 310 x 160 mm (control unit)
Weight : approx. 37 kg
230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 phase 

Scope of Delivery
1 experimentation unit
1 set of weights
1 control unit
1 set of instructional material

Order Details
040.28200  TM 282  Journal Bearing Friction

Alternative products

TM 260.06 -- Experimental Module Journal Bearing Pressure Distribution
TM 280 -- Journal Bearing Apparatus
TM 290 -- Hydrodynamic Bearing Apparatus

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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