Microprocessor electronics with speed preselection. Constant speed control via tachogenerator. Soft start feature. Restart interlock after power failure. Overload protection and temperature monitoring. VE electronics allow for infinitely variable preselection of belt speed. Unique tool attachment with quick coupling enables tool-free change of system attachments for satin finishing, pipe belt grinding, and filing. Fully potted electronic module prevents damage from dust. Three-fold winding protection reduces motor wear and extends service life. Grinding head swivels 140°. Grinding arms of 9 mm or 30 mm can be used. Grinding arm adjustable for belt lengths of 520 mm and 533 mm. Machining length of grinding arm is up to approximately 12 cm. Grinding belt change is quick and tool-free.