Calibration NABL NPL Calibrated Optional Torsion Testing Machine, Capacity 500 Nm

Torsion A device for testing is system of loading which causes section of a bar or shaft to rotate about its central longitudinal axis relatively to another such section and which thus produces twist or torsion in constitutes a, The bar torsional load. The load may be composed of forces acting in any direction but the twisting or torsional affect is supplied by the couples formed by these forces in planes normal to the central axis. The torsional shearing stresses in round cross profile vary from zero at the axis of the section to a maximum value at the extreme fibres. If no bending is present pure shear exists. Torsion testing machine comprises a pair of independent chucks. The twist is communicated through the test piece to the other jaw on which a weighted pendulum is attached. The resistance to deflection of pendulum causes a torque to be utilized to the test piece and the angles of deflection of pendulum is the measure of torque. This device is built for maximum twisting moment at about 50 kgm. It is fitted with jaws for accomo, Dating test pieces of 10 mm, 15 mm and 20 mm size either square or circular with square shoulder.