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V-belt test bench

The V-belt test bench was developed to test narrow V-belts used in the automotive industry for auxiliary units on vehicle engines. The tester is based on the principle of power breakdown by introducing slip. It uses the energy cycle system with mechanical energy feedback to minimize energy loss. The speed at the measuring spindle is 6000 rpm, and the transmission ratio can be adjusted to produce the desired slip. The test bench enables the measurement of torque, power and clamping force and can detect V-belt and timing belt breakage.


Testing of narrow V-belts used in the automotive industry as drive elements for auxiliary units on vehicle engines.
The functional principle of the test device is to be based on power disruption by specifying a slip.


The test stand is designed according to the energy cycle system with mechanical energy feedback. In this arrangement, an energy circuit is created via the test specimen (V-belt), two parallel shaft trains and a toothed belt drive, whereby only the sum of friction losses is required as drive power.

The speed of the measuring spindle is 6000 rpm.

On the V-belt side, the transmission ratio - and thus the specified slip - can be set on the small V-belt pulley of the parallel shaft, e.g. i = 2.05 : 1.

If the toothed belt is not fitted (i = 2.05 : 1), the transmission ratio is calculated by a computer module using the recorded speeds of the input and output shafts (parallel shaft). The torque resulting from the difference in the transmission ratios is measured with a torque measuring shaft and displayed digitally. The power is also calculated from the torque and speed and displayed digitally. The measured values for power and clamping force can be recorded using a dual-channel recorder.

The V-belt tension is realized by load weights for external lengths greater than 700 mm (three-disc test). V-belt lengths of less than 700 mm are tested with two pulleys and the tension is generated by pre-tensioning the parallel shaft.

An adjustable stop can be used to simulate non-retensioning of the test specimen.

Six adjustable times can be run using a time sequence control. The details and the total test time are recorded on two operating hours counters.

V-belt and toothed belt breakage are detected by corresponding cut-off devices.