1. Rubber tensile testing machine The tensile, tear, peel, compression, bending and shear tests of rubber products were carried out, measure the performance parameters of the product, such as tensile strength, elongation, elastic modulus and yield strength and son on. 1.1 The testing machine has overload protection device. When the applied force exceeds 2%-10% of the maximum capacity of the testing machine, the overload protection device ensures the automatic shutdown of the testing machine. 1.2 The test machine has limit position protection device. When the beam moves to the upper and lower limit positions, the limit device should act immediately to stop the movement automatically. 1.3 During the test, when the sample breaks, the test function automatically stops, the device automatically stops or according to set mode to returns, then stop.