Dienes Werke has new grinding machines for grinding and polishing all kinds of circular knives, and especially for regrinding the top and bottom knives of slitting machines and sheeters. The machines are designed for circular knives of a diameter up to 300 mm and are intended to be applied by small and medium-sized companies. The “SEMI” DC-3 is a semi-automatic grinding machine because the workpiece is moved manually. This machine can be upgraded to a fully automatic grinding machine, which is then called “SEMI-PLUS” DB-3. This machine’s features include workpiece fixing, automatic feed and process run.