To achieve higher-resolution image quality in copying machines and laser beam printers, it is necessary to improve machining precision for such key metal components as photosensitive drums, development sleeves, and polygon mirrors. Such components have become so sophisticated that specifications often call for machining with a runout accuracy of several tens of µm and surface roughness of several tens of nm. To attain such high levels of precision in machining, Canon has developed and manufactures in-house high-precision cutting machines that employ air-bearing technology, enabling advanced machining accuracy and cost savings that cannot be achieved by commercially available systems. The company is also working toward the development of machining processes to ensure stable machining.