Loading accuracy as high ± 1% ??? Straining at variable speed to suit a wide range of materials. ??? Printer & PC graphs enable study the behavior of the material ??? Motor driven threaded columns for quick effortless adjustment of middle crosshead to facilitate rapid fixing of test specimens. ??? Simplicity in reading because of digital readout. ??? Wide range of standard and special accessories, including load stabilizer. ??? Easy change from plain to threaded and screwed specimens. ??? Large effective clearance between columns enable testing of standard specimens as well as structures. ??? Simple controls for ease of operation. ??? Robust straining frame of an extremely rigid construction. ??? Safe operation ensured by means of safety devices. ??? Fully enclosed and protected pressure transducer. ??? RS 232 serial port to transfer data to computer for analysis/storage evaluation etc. ??? Manual control & release value operation Calibration of machine using Proving Ring Application: Universal Testing Machine is designed for testing metals and other materials under tension, compression, bending, transverse and shear load. Hardness Test on metals can also conducted. Principle of operation: Operation of the machine is hydraulic transmission of load from the test specimen though pressure transducer to a separately house load indicator. The system is ideal since it replaces transmission of load through levers and knife edges, which are prone to wear and damage due to shock of rupture of test pieces. Load is applied by hydrostatically lubricated ram. Main cylinder pressure is transmitted to Pressure Transducer housed in the control panel. The transducer gives the signal to the electronic display unit corresponding to the load exerted by the main ram. Simultaneously the Encoder fitted on the straining unit gives the mechanical displacement to the electronic display unit. Both the signals are processed by the microprocessor. The load and displacement is displayed on the digital readout simultaneously. The Machine consist of, Straining unit: This consist of a cylinder, motor with chain & sprocket drive and a table coupled with the ram of the hydraulic cylinder mounted on to a robust base. The cylinder and ram are individually lapped to eliminate friction. The upper cross-head is rigidly fixed to the table by two strengthened columns. Shear Test The Lower cross-head is connected to two columns which are driven by hydraulic piston. Axial loading of the ram is ensured by relieving the cylinder and ram of any possible side loading by the provision of ball seating. The displacement measuring derive Encoder having a minimum resolution of 0.1mm is provided to measure the deformation of the specimen. Tension test is conducted by gripping the test specimen between the upper and middle cross-head. Compression, transverse, bending, shear & hardness tests are conducted between the middle cross-head and lower table. The middle-cross fitted on two screw column moved up-down by gear motor operated through electrical motor for facilitating ease of fixing of the test specimen. Control Panel: The control panel consists of a power pack complete with drive motor and oil tank, control valves and Electronic display unit. Power pack: The power pack generates the maximum pressure of 200kgf/cm2 . The hydraulic pump provides continuously non-pulsating oil flow. Hence the load application is very smooth. Hydraulic Control: Hand operated wheel fitted on regulating valve are used to control the hydraulic flow to the cylinder to get variable speed of ram. Also this valve works as oil pressure relief valve to stop excess pressure developing after load reaches to is maximum capacity of machine