This standard specifies the main structure, requirements, test methods, inspection rules, marks and Encasement of rubber fatigue testing machines. It is suitable for testing machines for testing rubber flex checking, stretch fatigue and other fatigue characteristics. The testing machine is mainly composed of a power drive system, a transmission mechanism, reciprocating parts and numerical control devices. It has normal working conditions. The mechanical part requires the gripper to be reliable and the reciprocating motion is smooth. It is equipped with a counter and has functions such as automatic counting display and preset.