Abstract: Device for holes and trepans cutting containing a movable platform, a mechanism of rotation and feeding of the cutting tool installed on the platform, a box-shaped repair cabin with a through hole in a vertical wall thereof and, accommodating a positioning sleeve with an inner flange facing the inside of the repair cabin and an outer flange fixed outside the repair cabin. A mounting fixture secured on the inner flange of the positioning sleeve comprises a mounting plate fixed on the inner flange of the positioning sleeve. A rotating positioning plate is pivotally installed on the mounting plate. The mounting plate and the rotating positioning plate are provided with a mechanism for fixing in the closed position. The movable platform is provided with height-adjustable rotatable wheel supports. A catcher is fixed on the outer flange of the positioning sleeve for primary storage of cut trepans and collection of chips.

Abstract: A passive locking chuck for a rotary driver. The chuck has a pair of rings, one fixed and the other rotatable between a first orientation where recesses formed in the rotatable ring are aligned with recesses formed in the fixed ring, and a second orientation where the recesses are offset from one another. When an upper end of a foundation component having a toothed coupler is inserted into the chuck and rotated axially, the movable ring is moved to the second orientation and the foundation component is thereby captured in the chuck. As soon as resistance is encountered from the soil, the ring moves back to the first orientation so that upon reaching the desired embedment depth, the rotary driver may be withdrawn without counter rotation.

Abstract: The invention relates to a hydraulic expanding chuck for gripping a tool, for example a drill or a milling tool, comprising: a clamping part having an expansion sleeve having a central receiving opening for receiving and clamping the tool; and a connection part, in particular having a HSK connection. According to the invention, the expansion sleeve has at least two pressure chambers, which are designed to run around the central receiving opening, which are arranged at an axial distance relative to one another, and which can bulge when the tool received in the central receiving opening is subjected to fluid pressure. The at least two pressure chambers are connected to one another by a fluid channel.

Abstract: The invention provides a strength-boosting drill chuck comprising a drill body, a nut and a clamping claw, which the nut and the clamping jaw forms a threaded connection, and the drill body is provided with an inclined clamping claw hole for the clamping claw to slide forward and backward along the clamping claw hole; wherein the drill chuck is provided with a strength-boosting structure of the connecting force of the nut clamping claw, which is provided with a liquid plastic component, and the structure for exerting force and transmitting force to the liquid plastic component, which enables the force on the liquid plastic component to be transmitted to the nut. The invention can use the liquid plastic component to transmit force, greatly enhance the binding force between the nut and the clamping claw, and increase the force to resist the reverse force and the inertia force.

Abstract: A holder provided for mounting of a lathe cutter includes a carrier, a first joint seat, a second joint seat, a limit rod and a clamp member. The first and second joint seats are disposed on a first and second base of the carrier respectively. The lathe cutter is mounted between the first and second joint seats. The limit rod is inserted into a through hole of the lathe cutter, and a first and second ends of the limit rod are coupled to the first and second joint seats respectively. The clamp member is disposed on the limit rod. The clamp member and the second joint seat are provided to clamp the lathe cutter to separate the lathe cutter from the first and second bases.