Torsional Vibrational Apparatus
Product Code : EL-AMLE-10638
Quick Answer: This bench-top apparatus is used to study torsion and torsional vibration in experiments, built around a profiled aluminium base with levelling feet carrying 4 vertical chuck pillars, each with a central shaft running in precision bearings and a chuck that grips a torsion specimen and carries a disc of varying mass and inertia – allowing a torsion specimen to be assembled with up to 3 masses. Vibrations are transmitted into the specimen by an electronically speed-controlled exciter, a fifth chuck can rigidly clamp one end to achieve a fixed-end condition, and a manual torsion arrangement is also supplied; oscillation sensors mounted with each mass pillar feed the vibration-amplitude signal to the control unit, which conditions it for output to an oscilloscope (not supplied) for vibration analysis. The unit uses a corrosion-resistant steel torsion bar 1300mm long and Ø6mm, with torsional mass discs of Ø150mm and Ø228mm.
This bench top mounted unit is used to study torsion and torsional vibration in experiments. The apparatus is constructed around a profiled aluminium base with leveling feet, onto which is mounted 4 vertical chuck pillars, each containing a central shaft running in precision bearings with a chuck at one end that grips a torsion specimen and also carries a large disc of varying mass and inertia; with these chucks it is possible to assemble a torsion specimen with up to 3 masses.
Vibrations are transmitted into the torsion specimen by means of an exciter, which is electronically speed controlled from the main control unit. To change the end conditions of the apparatus a fifth chuck rigidly clamps the end of the torsion specimen to achieve a fixed end, and a manual torsion arrangement is also supplied with the apparatus.
Oscillations sensors are mounted integrally with each mass pillar and provide signals of the amplitude of vibration. The control unit conditions these signals and makes them available to an oscilloscope (not supplied) for vibration analysis.
Unit for investigating torsional vibration and torsional stiffness.
Observation of resonance, phase change.
To be made from profiled aluminum with levelling feet at each corner.
To have steel torsion bar, corrosion-resistant, 1300mm long, Ø6mm with torsional mass discs of Ø150mm and Ø228mm.
To have speed-controlled exciter with drive crank.
Angular movement of shaft recorded using oscillation sensors.
Electronic exciter control unit with digital display.
Torsion arrangement for modulus of rigidity experiments.
4 movable chuck pillars with integral bearings, the bearing units can be positioned as required.
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Last Updated: September 2026
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