The invention relates to a collet chuck (1) for clamping a preferably cylindrical tool shank with a chuck body (2) of a collet (3) and an union nut (4), which are matched in such a way that the collet (3) can be driven into the chuck body (2) by tightening the union nut (4) such that it secures the tool shank in the collet chuck (1) ready for operation, wherein the collet (3) and the union nut (4) are permanently connected to one another and at the same time connected in a rotatable manner relative to one another.

A chucking apparatus for chucking an object contains a basic body which has a receiving space in which the object can be disposed. A chucking device is provided with a chucking nut which is screwable onto the basic body and by the chucking nut being screwed onto the basic body the object disposed in the receiving space can be chucked non-rotatably. The chucking nut has a plurality of roller bodies having a defined roller engagement structure. The roller bodies are held in an axially rotatable manner on a chucking body of the chucking nut and are arranged distributed in the circumferential direction on the chucking nut. The rollers by their roller engagement structure are in engagement with the basic body engagement structure of the basic body.

A chucking apparatus for chucking an object contains a basic body which has a receiving space in which the object can be disposed. A chucking device is provided with a chucking nut which is screwable onto the basic body and by the chucking nut being screwed onto the basic body the object disposed in the receiving space can be chucked non-rotatably. The chucking nut has a plurality of roller bodies having a defined roller engagement structure. The roller bodies are held in an axially rotatable manner on a chucking body of the chucking nut and are arranged distributed in the circumferential direction on the chucking nut. The rollers by their roller engagement structure are in engagement with the basic body engagement structure of the basic body.

A machining jig holds a workpiece with respect to a tool that partially removes an outer peripheral surface of the workpiece. The machining jig includes a first jig including an inner peripheral surface having a shape similar to a contour of the workpiece and an outer peripheral surface including a first inclined section inclined with respect to an axial direction of the workpiece; a second jig including an inner peripheral surface including a second inclined section configured to be fitted to the first inclined section; a base to which the second jig is coaxially fixed; and a sliding mechanism that enables a large-diameter portion of the first inclined section and a small-diameter portion of the second inclined section to move toward and away from each other. The sliding mechanism of the machining jig causes the small-diameter portion of the second inclined section to press the large-diameter portion of the first inclined section so that compressive stress is applied to the outer peripheral surface of the workpiece at a position near a portion to be removed by the tool.

A machining jig holds a workpiece with respect to a tool that partially removes an outer peripheral surface of the workpiece. The machining jig includes a first jig including an inner peripheral surface having a shape similar to a contour of the workpiece and an outer peripheral surface including a first inclined section inclined with respect to an axial direction of the workpiece; a second jig including an inner peripheral surface including a second inclined section configured to be fitted to the first inclined section; a base to which the second jig is coaxially fixed; and a sliding mechanism that enables a large-diameter portion of the first inclined section and a small-diameter portion of the second inclined section to move toward and away from each other. The sliding mechanism of the machining jig causes the small-diameter portion of the second inclined section to press the large-diameter portion of the first inclined section so that compressive stress is applied to the outer peripheral surface of the workpiece at a position near a portion to be removed by the tool.

A precision clamping system having a collet having a tool receptacle and which includes a chuck body formed from a single part, on whose first end a connecting piece is formed, which is directly connectable to a machine spindle of a drilling machine, and on whose second end facing away from the first end a collet receptacle is formed for receiving the collet. The connecting piece is designed in such a way that a form-fitting connection to the machine spindle is established for positive rotary entrainment of the chuck body, the collet receptacle has a conical design, and the collet is assigned a collet thread which may be screwed to a thread formed on the second end of the chuck body. A combination of a drilling machine having a precision clamping system and a system including a precision clamping system having multiple collets is also provided.

A universal driven shaft retaining system includes a collet chuck holder that circumferentially engages a collet chuck with substantially inward compression during inward co-linear movement of a drawing bar creating a clamping (locking) effect on an inserted driven shaft.

The invention relates to a collet chuck (1) for clamping a preferably cylindrical tool shank with a chuck body (2) of a collet (3) and an union nut (4), which are matched in such a way that the collet (3) can be driven into the chuck body (2) by tightening the union nut (4) such that it secures the tool shank in the collet chuck (1) ready for operation, wherein the collet (3) and the union nut (4) are permanently connected to one another and at the same time connected in a rotatable manner relative to one another.

A universal driven shaft retaining system includes a collet chuck holder that circumferentially engages a collet chuck with substantially inward compression during inward co-linear movement of a drawing bar creating a clamping (locking) effect on an inserted driven shaft.

A collet adaptor (10) including a body (11, 12) having forward and rear ends and an axial bore (17) extending through the forward and rear ends. A drawbar (13) disposed at least partly within the bore (17) for connection to a collet (14). The drawbar (13) is secured within the bore (17) and a biasing arrangement (42) acts on the drawbar (13) in a direction tending to shift the drawbar (13) rearwardly within the bore (17). The drawbar (13) is displaceable within the bore (17) against the biasing influence of the biasing arrangement (42) to shift forwardly within the bore (17).