• Torsion tests with different materials and load until specimen fracture.
  • Determine the twisting strength.
  • Plot the diagram of twisting moment over twisting angle Iinfluence of
    • specimen material
    • specimen cross-section
    • specimen length


  • Torsion tests with different metallic specimens to fracture.
  • Manual generation of the twisting moment by means of handwheel and worm gear.
  • Specify the input angle via handwheel.
  • Long and short specimens of steel, aluminium, brass.
  • Movable measuring device for different specimen lengths.
  • Measure the test moment by means of straingauge measuring shaft and measuring amplifier.
  • Strain-gauge measuring shaft with compensation for inherent deformation.
  • Twisting angle measured by incremental encoder.
  • Electronic measuring amplifier with touch panel to display twisting moment and twisting angle

The torsion test is a destructive testing method that studies the plastic behaviour of materials. In practice, components that are twisted in their application (e.g. screws, shafts, axles, wires and springs) are studied with this test method.

The SM-1406A experimental unit allows torsion tests in which specimens are subjected to load until they fracture. The clean layout and simple operation mean the experimental sequence can be observed in all details and phases.

In the experiment, metallic specimens are twisted until they are destroyed by a typical shear fracture. The twisting moment is applied manually by means of a handwheel and a worm gear. The base plate is torsionally reinforced. The effective twisting moment is measured by means of a moment-measuring shaft fitted with strain gauges and can be read directly on a display. The twisting angle is recorded by an incremental encoder and can also be read. The measured values are transmitted directly to a PC where they can be analysed using the software (optional).

Specimens of different materials and different lengths are included in the scope of delivery. The measuring device can be moved on the rigid frame to adapt to different specimen lengths.