Removing Burrs In Confined Spaces

Special tool proposed to remove burrs on ring edges left by operations of hollow mill near bases of round posts. Conceived because posts placed so closely together that ordinary and makeshift tools damage adjacent posts and difficult or impossible to use in narrow, deep spaces surrounding edges to be deburred. Designed specifically for use on hollow liquid-oxygen-injector posts of spacecraft engine, general tool concept adaptable to similar deburring problems on otherwise inaccessible parts.