A cutting tool holding mechanism for detachably holding a cutting tool includes: a collet chuck configured to clamp and unclamp the cutting tool; a piston disposed deeper on the proximal side of the spindle than the collet chuck and configured to urge the collet chuck by the pressure of a fluid supplied from the proximal side of the spindle in the direction from the proximal side toward the distal end side of the spindle so that the collet chuck unclamps the cutting tool; a spool valve provided in the piston and configured to open thanks to centrifugal force at the time when the spindle is turned, so as to supply the fluid fed from the spindle side to the cutting tool.

A tool head having a shrink-fit chuck (10) that has an axial receiving hole (22), and having a tool (12) that is insertable by way of its cylindrical tool shank (24) into the receiving hole (22), which is open at the front end of the shrink-fit chuck (10), and is fixable therein by thermal shrinking of the shrink-fit chuck (10). The shrink-fit chuck (10) has, in its front end portion, an annular recess (30) that radially widens the receiving hole (22) and is open at the end side, and a function ring (14) is positioned on the tool shank (24), wherein, in the shrink-fitted state, the tool shank (24) is frictionally fixed in the receiving hole (22) and the function ring (14) sits at least partially in the annular recess (30).

A machining tool for chip-removing machining includes a tool body and a generator assembly for harvesting electric energy to be used in the tool. At least one first component is secured to the tool body and a second component is movably connected to the tool body so as to, by moving with respect to the first component through interaction therewith, generate electric energy in the first component. The generator assembly includes an arrangement for conducting a medium flow to hit and act upon the second component for moving it with respect to the first component.

A tool accessory used to apply different volumes of a cutting fluid to the tap under CNC control by causing the machine to undergo different pump cycles in which the rotational speed of the tool is increased above the tapping rotated and then quickly returned to the tapping rotation. The tool includes a tapping head, a reservoir filled with cutting fluid, a centrifugal force-reactive pump and at least two discharge nozzles. The pump includes a plurality of biased piston springs that are forced outward and store centripetal force when the tool is rotated at speeds above normal tapping speed. When the rotational speed of the tool is reduced, the piston springs overcome the centrifugal forces and force cutting fluid through the discharge nozzles. The volume of cutting fluid discharged is controlled by adjusting the viscosity of the cutting fluid, the tool's maximum speed, by using different size discharge nozzles, and by using different pump cycles.

A tool holding apparatus for interfacing a machine spindle receiver of a milling machine, which includes a holder nose connected to a holder body configured with a first divided section integrally connecting to a second divided section and a centralized axial bore for housing therewithin a tension bolt, a lock nut, and a thrust nut. The holder nose includes an axial bore incorporating a reverse-tapered configuration and three flat sectors to correspond with an equally configured shaft portion of a tool, whereupon the threaded attachment of the thrust nut to the holder nose furthers a locking arrangement of the tool within the axial bore to prevent inadvertent axial and rotational movement thereof during aggressive milling operations.

The invention relates to a tool holding device comprising a tool holding body for securing, in a fixed manner, a rotary tool comprising a shaft, provided with a clamping section and a receiving opening for the shall of the tool, a coolant feeding device for pressurized fluid, at least one coolant guiding device for guiding the coolant into a clamped tool shaft. The coolant guiding device is designed as at least one flat groove on an inner side of the receiving opening, joining to the front side on a free end of the tool holding body and directly adjacent to the tool shaft in the surroundings of the tool holding device or a coolant storing chamber and or collecting chamber is provided in the region of the free end of the tool holding body, to which the at least one coolant guiding device joins. The coolant storing chamber and or collecting chamber is connected by means of an annular gap to the surroundings of the tool holder device. The coolant storing chamber and/or collecting chamber and the annular gap are defined at least partially by the work shaft.

A tool holder for non-positively holding a rotatable tool by a receiving body containing a receiving opening with slits extending radially from the inner wall towards the exterior and running in the longitudinal direction of the receiving body. To permit a simple production process, the receiving body has an insert fixed into a receiving section.

For enabling accurate and efficient cutting work on a narrow area, in a hydraulic chuck configured such that a pressurization fluid pressurized by a push member (8b) is fed through a pressurization passage (8) to a pressurization chamber (6) to reduce a diameter of an elastic deformable part (2b), the hydraulic chuck includes a body (1) having a flange accommodating part (5a) opening at a small-diameter portion at a tip end of the body and a sleeve accommodating part (5b) opening in a bottom face of the flange accommodating part (5a), and a sleeve (2) having a hole (2a) in which a gripped object is inserted, the sleeve being engageable and insertable with/to the sleeve accommodating part (5b) from a leading end side of the flange accommodating part (5a), the sleeve (2) forming the pressurization chamber (6) reserving therein an amount of the pressurization fluid between this sleeve (2) and the sleeve accommodating part (5b), the sleeve (2) having a flange (7) engageable with the flange accommodating part (5a).

The invention relates to tool mount with a base body and a receptacle that is joined with the base body for torque transmission and anchored in the base body in an axially movable manner with a spring preload. The base body exhibits a shank section with a recess that is open on the machine tool side, and a bushing section that axially lengthens the shank section, with a guide borehole that is open on the tool side and separated from the recess of the shank section by a radial dividing wall. The receptacle exhibits a guide section that is guided in the guide borehole of the bushing section in an axially movable manner. The receptacle is anchored by means of an anchor that passes through an axial opening in the radial dividing wall and can be actuated for setting the spring preload via the recess of the base body.

A shrink-fit chuck having a receiving body, a receiving opening for a tool shank, arranged in the receiving body, an accumulation and collection chamber arranged in the front region of the receiving opening and at least one coolant supply channel leading to the accumulation and collection chamber. The accumulation and collection chamber is delimited to the front by a ring bar arranged at the front end of the receiving opening. The internal diameter of the ring bar is adjusted to the internal diameter of the receiving opening in such a manner that as small an annular gap as possible exists between the ring bar and the tool shank. A plurality of outlet openings are provided in the ring bar for discharging to the outside a coolant routed via the coolant supply channel into the accumulation and collection chamber.