Abstract: A reciprocatory saw, in particular, a jigsaw, is made up of a pitman with a chuck arranged for the releasable clamping of a saw blade. The chuck contains a movably mounted chuck jaw arrangement able to be clamped laterally against the saw blade shank, a wedge element arrangement adjacent to and for cooperation with the chuck means, a first spring acting downwardly on the inserted saw blade and a second spring acting on the wedge element arrangement downwardly. The wedge element arrangement is connected with the chuck jaw arrangement in a manner for the transmission of rotary movement and from the outside and is able to be shifted between a bottom clamping position clamping the chuck jaw arrangement against the saw blade shank and a top release position freeing the chuck jaw arrangement. The wedge element arrangement assumes an angular position turned in relation to the clamping position and is seated on a stationary holding face.

Abstract: A dust extractor device of a router has rotatable dust trap part able to be connected with a foot plate of the router and arranged to the side of the routing tool underneath the foot plate, such dust trap part being open toward the routing tool. The foot plate has an access opening for the routing tool. The dust trap part is constituted by an extractor hood with a hood casing at least essentially centered on the axis of rotation and a hood floor. The hood casing and the hood floor extend in the peripheral direction through an angle equal to or less than 180°. The extractor hood is open at its top side and opens into the access opening. The top end region of the extractor hood is rotatably supported on a holder, which is detachably secured to the foot plate and in the position of use extends around the access opening.

Abstract: A grinding disk (13) for manually held, motor-driven grinders (1) has a centrally arranged fastening recess (15) open at the grinding disk upper side with an internal thread arrangement (16), with which the grinding disk (13) can be screwed onto a connecting part (8), which is arranged on the side of the grinder and is driven for the grinding motion during operation, and which connecting part has a thread section (11) with an external thread arrangement (12), which is associated with the internal thread arrangement (16) of the grinding disk (13). The internal thread arrangement (16) is formed by a multiple thread with at least two thread courses, which are arranged angularly offset to one another. The diameter ratio between the diameter of the internal thread arrangement (16) and the outside diameter of the grinding disk (13) is at least approximately 0.25.