Abstract: A tool holder for holding a tool has at least one sensor for measuring an operating parameter of the tool holder or the tool during the operation thereof and generating measured value signals which are fed to a signal processing unit for evaluation. The sensor is a surface acoustic wave sensor operating according to acoustic wave principles and its measured value signals are readable in a contactless manner by means of radio waves. The surface acoustic wave sensor requires no current supply circuit but instead draws transmission energy required for transmission of the measured value signals to the signal processing unit from a high frequency interrogation signal, that is transmitted by radio waves from the signal processing unit and is received by the surface acoustic wave sensor.

Abstract: A chuck for a rotatable tool, such as a drill, a screw tap and the like has a chuck sleeve receivable in a machine and having a central receptacle, a sleeve provided for a tool and releasably inserted in the receptacle, the sleeve having a central main passage for a cooling and/or lubricating medium and grooves for supplying the cooling and/or lubricating medium in a longitudinal direction and outwardly of the tool, the sleeve having an axial opening adopted to extend over a whole length of a shaft of the tool for holding the shaft, the grooves for the cooling and/or lubricating medium in the sleeve being provided on an inner side of the axial opening and extending axially over a whole length of the sleeve, the grooves at one end communicating with the central passage in the chuck sleeve and at another end being axially freely open.

Abstract: A tool holder comprises a receptacle having one end connectable with a machine spindle, to a receptacle and the like and an opposite end, a head provided on the opposite end and having a coaxial cylindrical head opening, a housing received non-rotatably and axially longitudinally displaceable in the head opening and having a coaxial cylindrical housing opening, a quick exchange insert for a tool insertable in the housing opening and coupleable with the housing, and an inner signal device reacting to a relative movement between the head and the inserted quick exchange insert to produce a disturbance signal which identifies a damaged or a destroyed tool.

Abstract: A tool holder, particularly a fast exchange chuck preferably for thread cutting, thread shaping and the like has a receptacle having one end receivable in a machine spindle, a machine tool receptacle and the like, and another opposite end provided with a head having a coaxial cylindrical head opening, a housing received and guided in the cylindrical head opening non-rotatably but displaceably in a longitudinal direction and provided with a coaxial cylindrical housing opening, a fast exchange insert insertable in the housing opening a torque-transmitting unit for transmitting torque between the head and the housing and including a head longitudinal groove provided in the head, a housing longitudinal groove provided in the housing, and at least one drive body partially received in each of the longitudinal grooves so as to transmit torque between the head and the housing and to roll during a relative displacement between said head and said housing.

Abstract: A chuck for a tool, a workpiece and the like has a chuck body having an inner receptacle, a clamping device accommodated in the inner receptacle and having axially projecting spring regions, the clamping device having two ends which are axially supported and being axially compressible for clamping an element in an interior of the clamping device and an element for applying a compressing force to the clamping device at a front end of the chuck body.

Abstract: A threading apparatus has a rotatable and axially movable driving part, a driven part which is axially displaceable relative to the driving part and adapted for driving a threading tool, a switchable form-locking coupling device including a switching member connected with the driven part and provided with coupling members and at least one coupling part driven by the driving part and having coupling elements. The driven part with the switching member and the at least one coupling part are axially relatively displaceable so that the at least one coupling part with the coupling elements is positionable with the coupling members in form-locking coupling engagement with the driven part or in a not driven intermediate position. The switching member is connected with the driven part in an axially not-displaceable manner and coupled form-lockingly in a circumferential direction and drives the driven part.

Abstract: An overload coupling device includes a drive shank, a drive sleeve for driving the drive shank, a closure sleeve surrounding the drive sleeve, and a thrust ring. The drive sleeve is formed with a plurality of cage slots arranged in pairs to provide a first group of the cage slots of one width, which receive coupling balls of one group operative to transmit torque in the working drive direction, and a second group of the cage slots of a greater width which receive movable therein coupling balls of another group operative to transmit torque in the direction opposite to the working drive direction. The coupling device further includes an elastic element positioned in an annular groove between the closure sleeve and the drive sleeve and exerting on the respective coupling ball a prestressed radial force.

Abstract: A tool of a metal-cutting machine provided with numerical control has an information data carrier for storing various data of tool characteristics such as the length, diameter, service life and other parameters of the tool. The data carrier is formed by an electrically erasable programmable read-only memory which has a large storage capacity. The memory is rigidly inserted in the tool or tool holder and is protected against damage and contamination. Inadvertent release and loss of the data carrier are avoided.

Abstract: A chuck for drilling tools is formed with a hollow shank which can be accommodated in a machine spindle, and is provided with a sleeve, which is adapted for accommodating a quick-change insert in the form of a tool or serves to accommodate a tool and which is coupled with the shank through an adjustable torque clutch device which, in the event of an overload, automatically disengages along with an axial relative displacement between the shank and the sleeve. The chuck has a high-frequency transmission device which is provided with a current source of its own, a high-frequency transmitter, a switch, which is closable during the axial relative movements between the shank and the sleeve, in the current supply circuit of the high-frequency transmitter and an external aerial ring.

Abstract: The quick-change chuck is adapted to be fitted on a shank sleeve fitted is inserted to rotate therewith. A locking nut screws on the locking sleeve and a ball sleeve is carried by the shank sleeve. The ball sleeve has an annular extension piece with locking balls in an annular groove of the locking nut. A connector bush is axially displaceably held on the ball sleeve, is subject to the axial pressure of a spring, and has inner reception part and a substantially frusto-conically converging ramp face. A detent device automatically detains the connector bush in relation to the ball sleeve in its axial release position against self-effected dropping back into the locking position under the action of the spring, and on the introduction of the locking sleeve can be over-ridden with subsequent automatic axial displacement of the connector bush by means of the spring into its locking position.

Abstract: A chuck unit for boring, drilling or cutting tools having a safety clutch so as to prevent overload resulting from broken or dull tools and wherein when the clutch is actuated by an overload a transmitter in the tool support is actuated to radiate a signal which is detected by a receiver so as to indicate the malfunction and/or stop the tool so as to prevent damage to the tool or workpiece.

Abstract: An overload coupling device has a drive shank, a drive sleeve for driving the drive shank, a closure sleeve surrounding the drive sleeve and a thrust ring. The shank and sleeves is provided with apertures containing balls and the thrust ring is urged by a spring to normally hold the balls in the apertures of the drive shank and drive sleeve to provide a driving connection therebetween but allows the balls to slide in the apertures of the drive sleeve and into the apertures of the closure sleeve to release the driving connection in the event of torque overload.