Industrial Grade Impact Tester comes fitted with one electric counter for the number of trials taken during the test and consists a two piece annular specimen clamp having an inside diameter of 12.7 cm and confirming the standard and has lower half of the clamp that is rigidly mounted so that the plane of the specimen is horizontal and at an angle of 90 ° with respect to the upright dart supporting member of the machine. The Impact Tester is used to determine the energy that causes plastic films to fail under specified conditions of impact and the test is carried out by dropping a free falling dart with a diameter suitable to the type of film. The Impact Tester has an electromagnetic device that is fitted for use in supporting the instantaneously releasing the dart so that it will fall freely on the centre of the test specimen in the specimen holder. The Impact Tester has pin hole mark for positioning the dart at various drop heights from the impinging surface of the dart head to the surface of the test specimen. The Impact Tester has a dart consisting of a 3.81 cm diameter hemispherical head fitted with 0.64 cm diameter shaft 11.5 cm long, to accommodate removable mass. The Industrial Grade Impact Tester is designed with steel masses of twenty and all are suitable to hold in the dart. The Impact Tester has a shaft that is attached to the centre of the flat upper surface and is provided with a 1.27 cm long steel tip at the end for supporting in the adaptor.
