Using the internal grinding machine specially developed for tubular radiator production, it is possible to grind welded radiator elements at the head end/tube weld seam in particularly hard-to-access inner areas with a top quality and economical finish. The exceptional results are achieved here through the use of NC-controlled grinding units. Added to this comes a high production capacity of up to 2500 elements / hour, as well as fully automatic set-up according to one of the five element types on the 10" infra-red touch panel.