Overview

So far a fatigue testing machine is generally used at a research and develop department of the company. If a fatigue test could be easily carried out in the production line, it is useful to increase a quality of spring. This machine was developed to meet this purpose and has following characteristics. "Spring is tested under a pre-set load. If spring is fatigued during testing, a load is automatically compensated and test is continued under a constant pre-set load." This machine adopts a hydraulic method and solved the general disadvantages of a hydraulic method such as energy loss, difficult maintenance, use of special hydraulic unit by a new development of special components and hydraulic circuit. Further, a power unit is energy saving type and its maintenance cost is nearly same as one of mechanical type.