The “Tannert” sliding friction test rig
The sliding friction wear indicator (modified Tannert) is a standard test device for investigating the friction behavior in slow oscillating sliding movements.
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The tests can be run dry or lubricated. A sliding tongue is moved back and forth between two sliding blocks oscillating at low speed. Instead of the sliding blocks (surface contact), adapters with cylindrical rollers can also be used as test specimens (line contact). In the load increase run, the normal force is increased after each movement cycle until stick-slip (jerk sliding) occurs or the maximum load is reached. The friction force is continuously recorded on a PC. In addition, sliding speed and downtimes can be varied in the test. |
| Test bench parameters | |
| Sliding speed | 0.4 mm/min. up to 20 mm/s (standard 0.2 mm/s) |
| Load | 1 to 1,800 Newton |
| Temperature | -10 to 100°C (with heating cartridge in the sample 280 °C) |
| Movement types | oscillating gliding |
| Friction conditions | Dry friction, mixed friction |
| Contact geometry | Surface or line contact |
| Measured variables | Frictional force, optical surface assessment |
Other tests
- Determination of the friction behavior at slow speeds
- Determination of static and dynamic friction coefficients as a function of the stress spectrum
- Investigation of the stick-slip tendency of a tribological system
Possible specimen geometries
