180 series Valve Seats Boring Machine with high availability meets the requirements of boring, reaming and cutting process for high accuracy valve guides and valve seats. Light workhead of patent-based design is equipped with multi-air-floating device, self-centering system and built-in spindle motor. The perfect design results in minimal work-head inertia and maximal floatation for the unmatched centering sensitivity. It suit to maintain and repair near all sorts of engines used on motorcycle and automobile.