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Friction refers to the obstruction of movement that occurs between two solid bodies in contact with each other. The resulting friction forces are dependent on the normal force and the friction coefficients of the surface pairing.
TM 260 enables different cases of rolling and sliding friction to be studied. The parameters of a tribological system are recorded and evaluated. The device forms the base unit for a series of experiment modules from different topical areas of tribology. The comprehensive range of accessories and friction pairings makes it possible, among other things, to represent how the friction force is independent of the contact surfaces.
The speed of the DC motor is continuously adjustable via a potentiometer housed in the display and control unit. The speed is measured by means of a rotary encoder and is indicated on a display. Since the motor block is mounted so that it can pivot, the drive shaft can be positioned horizontally or vertically. Force sensors are used to determine the moment of friction. The force is indicated on the display and control unit.
The different experimental units are quickly and easily mounted on the base module. The display and control unit supplied is designed to operate the experimental units.
The following experimental units can be operated with the base module: Rolling / Sliding Disc (TM 260.01), Optical Elastohydrodynamics (TM 260.02), Pin on Disc (TM 260.03), Slip/Stick & Friction Vibration (TM 260.04), Block on Ring Friction (TM 260.05), Journal Bearing (TM 260.06).
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
The base module, along with the corresponding accessories, enables the following experiments:
- rolling friction of two discs with slip
- elastohydrodynamic (EHD) rolling friction of a sphere against a flat surface
- wear test: pin against disc
- wear test: friction wheel experiment
- frictional vibrations and "stick-slip" effects
- pressure distribution in the journal bearing
 investigation and visualisation of tribological phenomena
 modular design, experimental units quickly swapped thanks to quick-clamping elements
 pivotable drive consisting of DC motor with worm gear
 speed infinitely variable
 speed measured by incremental encoder
 force measurement by strain gauge
 digital readout of force and speed on the display and control unit
- DC motor
- nominal speed: 3000min-1
- torque: 18,5Nm
- worm gear: ratio 15:1
- operating speed: 0...200min-1, electronically controlled
- force: 0...50N
- speed: 0...200min-1
Dimensions and Weight
LxWxH: 500x450x280mm (experimental unit)
Weight: approx. 10kg
LxWxH: 360x330x170mm (display and control unit)
Weight: approx. 6kg
Required for Operation 230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Scope of Delivery
1 experimental unit
1 display and control unit
1 set of cables
1 set of instructional materials