The present invention discloses a tapping shank which mainly consists of axial, radial and deflection comprehensive floating mechanisms and a high-sensitivity rolling clutch safety mechanism. The present invention has an actual safety guarantee in tapping an M1 thread, solves the problems of axial pressure and tension of a main shaft on a screw tap, and eccentric and deflection errors between the screw tap and a bottom hole, ensures the precision of a hole diameter and a longest service life of the screw tap, and is also a high-precision hole machining floating reamer shank.

The present invention discloses a tapping shank which mainly consists of axial, radial and deflection comprehensive floating mechanisms and a high-sensitivity rolling clutch safety mechanism. The present invention has an actual safety guarantee in tapping an M1 thread, solves the problems of axial pressure and tension of a main shaft on a screw tap, and eccentric and deflection errors between the screw tap and a bottom hole, ensures the precision of a hole diameter and a longest service life of the screw tap, and is also a high-precision hole machining floating reamer shank.

A tool holder includes a tubular body having a shank on a first axial end portion, a tool gripping portion on a second axial end portion, and an elastic segment interposed between the shank and the tool gripping portion in the axial direction of the body. The elastic segment is more elastically deformable along the axial direction and around a circumferential direction of the tubular body than the shank and the tool gripping portion owing to a plurality of voids that extend through the elastic segment from an outer peripheral side of the tubular body to an inner peripheral side of the tubular body. Each of the voids includes segments that extend around the circumferential direction and along the axial direction of the tubular body.

The present invention discloses a tapping shank which mainly consists of axial, radial and deflection comprehensive floating mechanisms and a high-sensitivity rolling clutch safety mechanism. The present invention has an actual safety guarantee in tapping an M1 thread, solves the problems of axial pressure and tension of a main shaft on a screw tap, and eccentric and deflection errors between the screw tap and a bottom hole, ensures the precision of a hole diameter and a longest service life of the screw tap, and is also a high-precision hole machining floating reamer shank.

The present invention discloses a tapping shank which mainly consists of axial, radial and deflection comprehensive floating mechanisms and a high-sensitivity rolling clutch safety mechanism. The present invention has an actual safety guarantee in tapping an M1 thread, solves the problems of axial pressure and tension of a main shaft on a screw tap, and eccentric and deflection errors between the screw tap and a bottom hole, ensures the precision of a hole diameter and a longest service life of the screw tap, and is also a high-precision hole machining floating reamer shank.

A tap holder includes a body extending along an axis and having a front end portion defining a front opening and an externally threaded portion. A gripping assembly includes a spring having first and second legs, a first jaw mounted to the first leg, and a second jaw mounted to the second leg. Each jaw has a tapered outer wall and an inner wall with the inner walls of the jaws facing each other. A sleeve has an internally threaded bore threadably received on the externally threaded portion of the body, and an inner tapered surface configured to abut the tapered outer walls of the first and second jaws. As the sleeve is rotated relative to the body, a distance between the first and second gripping surfaces may be adjusted for gripping a tap between the inner walls of the first and second jaws. Each of the inner walls includes first and second gripping surfaces, the first gripping surfaces defining a first width therebetween for gripping taps having a first range of head sizes, and the second gripping surfaces defining a larger second width therebetween for gripping taps having a second, different range of head sizes.

A tap holder includes a body extending along an axis and having a front end portion defining a front opening and an externally threaded portion. A gripping assembly includes a spring having first and second legs, a first jaw mounted to the first leg, and a second jaw mounted to the second leg. Each jaw has a tapered outer wall and an inner wall with the inner walls of the jaws facing each other. A sleeve has an internally threaded bore threadably received on the externally threaded portion of the body, and an inner tapered surface configured to abut the tapered outer walls of the first and second jaws. As the sleeve is rotated relative to the body, a distance between the first and second gripping surfaces may be adjusted for gripping a tap between the inner walls of the first and second jaws. Each of the inner walls includes first and second gripping surfaces, the first gripping surfaces defining a first width therebetween for gripping taps having a first range of head sizes, and the second gripping surfaces defining a larger second width therebetween for gripping taps having a second, different range of head sizes.

A support system for use with one or more tools such as a handheld power drive and a geared threader is described. The support system includes a lower frame portion for contacting a work surface or floor, a mast assembly, releasable engagement provisions between the lower frame portion and the mast assembly, and mounting provisions on the mast for supporting one or more tools. The support system is configurable between a stand alone mode and a vehicle hitch mode.

A tapping apparatus adapted for tapping a workpiece includes a lower die unit to drive the workpiece to move along a conveying direction, and an upper die unit disposed above and movable upwardly and downwardly relative to the lower die unit. A tapping mechanism is disposed between the lower and upper die units to be driven by the upper die unit for tapping the workpiece so that the workpiece is formed with a tapped hole. A thread checking mechanism is disposed between the lower and upper die units and is spaced apart from the tapping mechanism along the conveying direction. The thread checking mechanism is driven by the upper die unit for checking the tapped hole of the workpiece.

A tapping apparatus adapted for tapping a workpiece includes a lower die unit to drive the workpiece to move along a conveying direction, and an upper die unit disposed above and movable upwardly and downwardly relative to the lower die unit. A tapping mechanism is disposed between the lower and upper die units to be driven by the upper die unit for tapping the workpiece so that the workpiece is formed with a tapped hole. A thread checking mechanism is disposed between the lower and upper die units and is spaced apart from the tapping mechanism along the conveying direction. The thread checking mechanism is driven by the upper die unit for checking the tapped hole of the workpiece.