At NB, our Spindle Units are meticulously crafted to exceed even the most rigorous standards, ensuring unparalleled precision and reliability. Our renowned shaft series has not only become a staple in general industrial machinery but has also elevated the performance of semiconductor fabrication systems and specialized equipment. To guarantee exceptional durability, we utilize high-carbon chromium bearing steel (SUJ2) and martensite stainless steel (SUS440C or equivalent) for outstanding wear resistance. Through our cutting-edge heat-treatment techniques, these materials undergo quenching and tempering processes to establish a uniform hardened layer both circumferentially and axially, further enhancing their longevity and resilience.