Through all processes from raw material testing to final test products, various data with through-going test are compiled and analyzed. The results of these data are applied to every process.
We especially put into precisely and promptly operation by using the advanced automatic facilities several important tests of springs-material test, microstructure and hardness after heat-treatment, preset for load test and fatigue test.
Also we will continue to make effort for inprovement in quality research development with the accumulated technique for 30 years.