The torsion test is a destructive testingmethod that studies the plastic behaviour of materials. In practice, componentsthat are twisted in their application (e.g. screws, shafts, axles, wires andsprings) are studied with this test method. The experimental unit allowstorsion tests in which specimens are subjected to load until they fracture. Theclean layout and simple operation mean the experimental sequence can beobserved in all details and phases. In the experiment, metallic specimens aretwisted until they are destroyed by a typical shear fracture. The twisting moment is applied manually by means of a hand wheel and a wormgear. The base plate is torsionally reinforced. A transparent protective coverprotects against flying fragments.