The invention relates to a hydraulic expansion chuck comprising a main body (1) that extends along a rotational or longitudinal central axis (2) and is composed of a shaft part (20), for directly or indirectly coupling the hydraulic expansion chuck to a module of a modular tool system or to a machine spindle, and a clamping part (30), joined to the shaft part in a rotationally and axially fixed manner for receiving and clamping a shank tool. The shaft part comprises a receiving socket which extends towards the clamping part and has a central socket-opening in which a connection pin (31) of the clamping part, which pin extends towards the shaft part, is form-fittingly received. According to the invention, the clamping part comprises a stop which is radially offset from the connection pin and axially strikes the receiving socket.

A hydraulic expanding chuck having a main body which extends along a rotational axis and has a clamping part for receiving and clamping a shank tool and a shank part having a hollow shank for directly or indirectly coupling the hydraulic expanding chuck to a module of a modular tool system or to a machine spindle. The clamping part has a central receiving opening and, around the receiving opening, at least one pressure chamber to which fluid pressure can be applied and which is separated from the receiving opening via an elastically yielding expansion wall and is connected via a pressure duct to a pressure-generating device situated in the main body. The pressure-generating device is arranged axially in the region between the receiving opening and the hollow shank in a central cut-out, which is coaxial with the receiving opening and which opens into the hollow shank.

A clamping assembly includes a collet adapter and an expansion sleeve movably disposed in collet adapter and a draw pin movably disposed in the expansion sleeve. The expansion sleeve cooperates with the draw pin to define a containment system configured maintain the expansion sleeve within an axial envelope and a radial envelope within the collet adapter. Axial movement of the draw pin in the expansion sleeve within the axial envelope causes a portion of the expansion sleeve to expand radially outward to a predetermined maximum diameter to releasably clamp the collet in the collet adapter.

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.

A plurality of friction rods each of which is positioned in a hole around the retaining bore with a portion of each of the plurality of friction rods partially protruding into the retaining bore for directly engaging the shank of the tool for holding the shank of the tool in the retaining bore at the defined contact surfaces.

In a component for connecting a shaft to a clamping holder that can receive a rotor, the clamping holder is able to be inserted into a cup-shaped housing and is able to be fixed there by fasteners. On the housing base of the housing is a connector for connecting the housing to the shaft in a torque-proof manner. The fasteners are arranged with their base surface on the outer lateral surface of the housing, and can be brought into engagement with the clamping holder by bores present in the housing. The fasteners have at least one recess in the base surface, such that they rest with their base surface on the outer lateral surface only in some regions.

A tool holder (100) for holding a tool (200) has pressurizing chambers (123a, 123b) provided between a body member inner peripheral surface (111) of a body member (110) and a sleeve outer peripheral surface (122) of a sleeve (120). Grip parts (124a, 124b) are provided between the sleeve outer peripheral surface and a sleeve inner peripheral surface (121) and are elastically deformed radially inward when pressure in the pressurizing chambers is increased. An extended chamber (123d) is defined between the sleeve outer peripheral surface and the body member inner peripheral surface, fluidly communicates with the pressurizing chamber and extends in an axial direction and in a circumferential direction. The extended chamber curtails radially inward elastic deformation of a portion of the body member inner peripheral surface, which corresponds to one of the grip parts, when a pressing force is received on a body member outer peripheral surface (112).

A pipe spinning power drill accessory a stem, shaft, first knurled assembly, second knurled assembly, first state, and second state. The first knurled assembly and the second knurled assembly are each cylindrically shaped. The first knurled assembly is centrally affixed to the stem. The shaft is centrally affixed to the first knurled assembly opposite the stem. The second knurled assembly is centrally affixed to the shaft opposite the first knurled assembly. The first knurled assembly and the second knurled assembly each selectively expand laterally. In the first state, the first knurled assembly and the second knurled assembly are each not laterally expanded. In the second state, at least one of the first knurled assembly and the second knurled assembly are laterally expanded. The stem is configured to be inserted into a chuck of a power drill. The stem is cross-sectionally hexagonally shaped and includes a region of decreased diameter.

A plurality of friction rods each of which is positioned in a hole around the retaining bore with a portion of each of the plurality of friction rods partially protruding into the retaining bore for directly engaging the shank of the tool for holding the shank of the tool in the retaining bore at the defined contact surfaces.

An appliance for heat treatment or inductive heating or cooling of shrink chucks for shaft-type tools or a shrinkage appliance or cooling appliance or shrinkage appliance with a cooling appliance, includes a receiving device or opening receiving a shrink chuck, a heat treatment unit surrounding the receiving device relative to a central axis, an induction coil arrangement or cooling unit, and a measuring unit for temperature measurement of the shrink chuck. For exactly measuring shell temperatures of chucks in receiving openings, the measuring unit has temperature sensors around the receiving device or one temperature sensor inclined around the central axis for contactless detection of the shell temperature, or the measuring unit has sensors around the receiving device including a first temperature sensor for contactless detection of a shell temperature, and a different type of second sensor for detecting another property of the shrink chuck in the receiving device.