metro nut and bolt is a test device for measuring the torsional properties of materials. It can be used to test the torsional properties of various metal and non-metal materials. Torsion testing machine test product classification, torsion testing machine is divided into spring torsion testing machine, wire torsion testing machine and material torsion testing machine. Materials metro nut and bolt is divided into metal materials metro nut and bolt and non-metal materials metro nut and bolt; Materials metro nut and bolt are available in manual, automatic and microcomputer control models.

Widely used in welding joints, spring steel, steel wire, wire, wire, cable and other metal non-metallic materials torsion test. Performance parameters such as torsional strength, upper yield strength and lower yield strength can be obtained. metro nut and bolt is a test machine used to determine the torsional properties of materials, which can be used for the torsional properties of various metal materials and non-metal materials. How does the metro nut and bolt work? The metro nut and bolt body is provided with a basic fixing chuck, a section of torsion sample is fixed by two planes and clamping bolts, and the base is provided with a horizontally moving electric reduction device. The left end is a rotating chuck for clamping the other end of the sample. When the electric accelerator rotates, the movable chuck is driven to rotate, and one end of the sample is rotated against the other end, so that the sample is distorted. The torque acting on the specimen is balanced by a weighing mechanism connected to a fixed chuck, which simultaneously drives the rotation of the loading pointer to indicate the magnitude of the torque. It also drives the plotter's brush to move left and right, and the torque coordinate of this movement is perpendicular to the length of the paper on the recording paper.

The rotating momentum of the movable chuck represents the rotation of one end of the sample with respect to the other end, that is, the torsion Angle. The size of the twist Angle is indicated by the scale on the detachable clamp. At the same time, the Angle signal is input to the plotter through the rotation sensor, which drives the plotter tube to rotate and outputs the recording paper. The angular coordinates are formed in the direction of the length of the recording paper.

In the test process, with the increase of the torsion deformation of the specimen, the torsion moment of the specimen will also change, and the plotter will draw the test curve of the torsion moment and torsion Angle.

metro nut and bolt https://www.hbrailwayfastening.com/Spear-Bolt-Metro-Bolt.html