Abstract: The armature (1) for high-speed electric motors force-ventilated in air containing abrasive dust, in particular in electric tools including right angle grinders, has windings which are laid in slots (7) of an armature laminate stack (5), and are held down in the slots (7) by elongated, elastic slot seals (15), and forth winding overhangs (9, 11) on the end faces of the armature. To increase the strength of the armature winding, the resistance to cooling air containing abrasive dust, and to improve the cooling, the slot seals (15) project over the slots (7), follow the contour of the winding overhangs (9, 11), in particular along surface lines, in the armature longitudinal direction, extend up to the end faces of the armature (1), and their ends are secured there by a ring (19) or cord winding (17).

Abstract: A device for releasable mounting of a disk-shaped tool on a working spindle, comprises two flange members arranged to abut against the tool, supporting elements arranged to support one of the flange members against its axial displacement on the working spindle, wherein the supporting elements are releasable so as to unload the one flange member from a clamping pressure and formed as rolling bodies, arranged between the working spindle and the one flange member and displaceable transversely to their supporting direction into a deviating space.