Mechanical Fatigue Testing Machine is rotating beam type machine in which load is applied in reversed bending fashion. Mechatronic Control System manufactures Mechanical Fatigue Testing Machine. The other products manufactured by Mechatronic Control System include different types of testing machines. Mechanical Fatigue Testing Machine is used to test the fatigue strength of materials and to draw S-N diagram by research institute, laboratories, material manufacturers and various industries. The standard 8 mm diameter specimen is held in special holders at its ends and located such that it experiences a uniform bending moment. The specimen is rotated at 4200 rpm by a motor. A complete cycle of reversed stresses in all fibres of the specimen is produced during each revolution.