Working of Torsion Testing Machine

Working of Torsion Testing Machine Points : Working of Torsion Testing Machine Torsion test is carried out to determine the value of modulus of rigidity arid ultimate length of a metallic specimen. In the testing machine the ends of the specimen are held in suitable grips through or which the torque is applied, the other is connected to the torque arm by means of which torque on the specimen is measured. The torque arm is attached to the indicating unit there intermediate levers housed in the cabinet. The levers are so arranged that, the indicator novas clockwise direction, irrespective of the direction of torsion in the specimen. The chart (60,000 kg — cm or 20,000 kg-cm) is selected by means of a hand lever at the front of the cab identia1 face plates provided with attachment holes and tendon slot are fitted to the straining spindle and torque arm spindle. The angular moment of straining spindle and holder is indication on a larger diameter protector and venire which record deflections down to 0.1 degree.