The fine mesh filter prevents coarse particles from entering the motor housing, such as e.g. aluminium shavings, abrasive cloth of fibre discs, accumulations of polishing paste or pieces of rock. Using the filter during these applications increases the service life of the machine. Quick and 100% cleaning of the filter thanks to outside dust grille. The smooth surface, without disturbing edges, corners or ridges prevents the formation of dust accumulation. Simple, tool-free installation and removal of the filter thanks to mounting hook for the air vents