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TM 200 Fundamentals of mechanical friction



  • Fixed friction body, uniformly moving supporting friction surfaces


Technical Description
The unit is used to determine coefficients of friction, it provides fundamental experiments relating to static and dynamic friction. Two solid bodies are moved against each other in uniform manner. The friction forces occurring in the process are measured.
One material under investigation is connected to a force gauge and remains at rest on the surface of the paired material which is driven by a motor and slides beneath the friction body. Two sliding speeds can be selected. The change in normal force is effected by additional loads.
All parts are clearly laid out and well protected on a storage system.

Learning Objectives / Experiments
- difference between static and dynamic friction
- friction forces as a function of
   * normal force, material pairing, size of contact area
   * sliding speed (relative speeds of the paired materials)
   * surface properties of the friction partners
- determination of friction coefficients


[1] fundamentals of mechanical friction
[2] friction body and force gauge stationary, supporting friction surface motor-driven
[3] 2 friction bodies each with 2 different surfaces
[4] 2 supporting friction surfaces with a total of 3 different surfaces
[5] 2 cable drum driving speeds
[6] force gauge overload-proof, with clearly legible transparent dial
[7] storage system to house all parts

Technical Data
Supporting surfaces: Al / felt, PVC
Friction body: smooth / rough (Al), brass / felt
Driven by synchronous motor
   - driving speeds: 23,5cm/min; 47cm/min
Force gauge
   - measuring range: 0...2N, graduations: 0,1N
Load: 8x 0,5N

Dimensions and Weight
LxWxH: 720x480x178mm (storage system)
Weight: approx. 10kg (storage system)
Weight: approx. 4kg (experimental unit)

Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase

Scope of Delivery
1 experimental unit, 1 set of loads, 2 friction body, 2 supporting friction surfaces, 1 storage system with foam inlay, 1 set of instructional material

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