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TM 232 Bearing Friction
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Statics /

TM 232 provides experiments relating to friction on sliding and rolling bearings. Bearing shells in various materials serve as sliding bearings. Bearing forces are generated by the dead-weight of a heavy flywheel. A torque is applied by means of weights which correspond to the frictional torque when the motion begins. When the rolling bearings are used the bearing friction is very low. In this case the flywheel can be used for fundamental experiments in rotational dynamics.

The unit is intended for mounting on a laboratory wall.

Learning Objectives / Experiments

- Determination of friction torque on sliding bearings: various meterial

  pairings by means of interchangeable bearing shells
- Determination of the friction torque on a rolling bearing
- Comparison between sliding and rolling bearing
- Fundamental experiments in rotational dynamics


[1] Experiment in sliding bearing friction with various material pairings and comparison with rolling bearings
[2] 3 different bearing materials for sliding bearing shells
[3] Stainless steel shaft 
[4] Flywheel of galvanised steel
[5] Drive by cable drum and weight set
[6] Base plate of anodised aluminium
[7] Experiments in rotational dynamics possible
[8] Box to house the components


Technical Data

Sliding bearing half-shell material
- GG-25
- gunmetal
- PTFE (Teflon) 
Grooved ball bearing: type 6203
Bearing journal of shaft: d=17mm

- d=300mm
- weight: 22,2kg

- 1x 1N (hanger)
- 5x 1N
- 1x 2N
- 3x 5N

Base plate, l x w x h: 250x200x12mm


Dimensions and Weight
l x w x h: 200x330x300mm
Weight: approx. 30kg
Scope of Delivery
1 experimental unit 
6 bearing shells
2 rolling bearings
1 set of weights 
1 storage box with foam inlay
1 set of instructional material
Order Details
040.23200  TM 232  Bearing Friction