A rapid change chuck adapter system includes a chuck adapter that is removably attachable to the chuck in place of removed chuck teeth. The chuck adapter is operable to engage a collet such that an operation of the chuck as if the chuck teeth were not removed operates the collet via the chuck adapter.

A tool adaptor includes a body, a sleeve slidably mounted around the body, an elastic member abutting against the body and the sleeve, and an engaging ball. The body has a connecting hole and an engaging hole. The sleeve has a pressing portion. The engaging ball is movably disposed in the engaging hole and selectively pressed by the pressing portion to enter the connecting hole and to engage with an engaging groove a tool. A size of the at least one engaging ball is configured such that when the at least one engaging ball enters the connecting hole, a clearance is formed between an outer periphery of the engaging ball and a groove bottom face of the engaging groove.

A balancing adapter for a balancing device has a clamping device for clamping a workpiece. The clamping device has a clamping sleeve element with a clamping sleeve, and a clamping element that can be moved relative to the clamping sleeve element. The clamping sleeve has a taper, and the clamping element has a mating taper corresponding to the clamping sleeve taper. The clamping diameter of the clamping sleeve can be adjusted, and thus a workpiece can be clamped, by moving the clamping element relative to the clamping sleeve element. The clamping sleeve element is releasably connectable to a base body of the balancing adapter. Accordingly, for connection to the base body, the clamping sleeve element has an annular flange by which, in the connected state of the clamping sleeve element and the base body, the clamping sleeve element rests on an end wall of the base body.

A quick-release tool connecting rod is provided, including: a rod body, a quick-release mechanism and a second sleeve member. The rod body includes an inner space extending in an axial direction and a through hole communicated with the inner space. The quick-release mechanism includes a push rod received within the inner space, a locking member disposed within the through hole and a first sleeve member sleeved to the rod body. The first sleeve member is movable relative to the rod body in the axial direction to drive the push rod to move. The second sleeve member is co-movably sleeved to the first sleeve member, and the first sleeve member is partially embedded within an inner peripheral wall of the second sleeve member. The first sleeve member has a first hardness, and the second sleeve member has a second hardness which is smaller than the first hardness.

A tool holder, for a tool assembly, comprising a tubular element having a cavity and a central axis; a damping mass arranged within the cavity and movable radially with respect to the central axis and relative to the tubular element; an adapter having a rear part fixed to the tubular element, and a front part for connection to an end effector of the tool assembly, the rear part comprising an opening, and the damping mass is at least partly received in the opening with a radial clearance; and an elastic element positioned between the adapter and the damping mass, the elastic element being arranged to support the damping mass and to damp radial vibrational movements of the damping mass relative to the tubular element, and the elastic element comprising a front surface substantially perpendicular to the central axis and a rear surface substantially perpendicular to the central axis.

A hydro chuck includes a shank portion provided on one end side in a longitudinal direction and having, on a leading end side thereof, a cylindrical chuck portion for gripping a gripped object and an operational portion provided on the other end side in the longitudinal direction and disposed in continuation from the shank portion. The shank portion is fixable by being inserted to a tool mount included in a machine tool. The chuck portion includes a sleeve gripping the gripped object and a fluid pressure chamber formed on an outer circumference side of the sleeve and filled with fluid, the chuck portion being configured such that in association with a rise of a pressure of the fluid inside the fluid pressure chamber, the sleeve is reduced in its diameter to grip the gripped object. The operational portion includes a communication passage communicated to the fluid pressure chamber and a pressurizing piston disposed in the communication passage and adjusting the pressure of the fluid inside the fluid pressure chamber.

A quick-release device for screwdriver bit includes a shank having a polygonal hole longitudinally defined in one end thereof and adapted for partially receiving a bit. At least one slot is longitudinally defined in the shank. An annular groove is defined in an inner periphery of the polygonal hole and communicates with the at least one slot, wherein the annular groove is formed with a tapered section toward the first end of the shank. An expandable limit element is received in the annular groove. A sleeve is movably sleeved on the shank. The sleeve has at least one protrusion inwardly extending therefrom and engaged into the at least one slot and abutting against the limit element when removing the bit form the polygonal hole. A stopper is secured on one end of the shank for preventing the sleeve from removing from the shank.

A tool holder for a cutting tool having a tool shank includes a receptacle which extends in an axial direction and a sleeve disposed in the receptacle. The sleeve includes a tool receptacle structured to at least partially receive the tool shank and a blocking element that projects radially into the tool receptacle. The axial positioning of the sleeve is adjustable with respect to the receptacle.

A wood-drill adapter system having a wood-drill adapter assembly. The wood-drill adapter assembly includes a core-bit-blank, an adapter-insert, and a set-screw. The core-bit-blank includes a hollow-tubular body, with the hollow-tubular-body including a hole; and the cap includes a cap-plate, and a threaded-coupler. The wood-drill adapter assembly is useful for allowing a user to use a coring-rotary-tool typically used for concrete drilling/coring to drill a circular-opening in a wooden-material using the wood-boring tool. The adapter-insert includes an upper-disc, a tubular-body, a lower-disc, and a set-screw-receiver. The upper-disc includes an upper-face, a lower-face, an outer-circumference, and an upper-aperture. The lower-disc includes an upper-surface, a lower-surface, an external-circumference, and an internal-circumference. The tubular-body includes an outside-circumference, an inside-circumference, an upper-rim, and a lower-rim.

An illuminated tool bit assembly for illuminating a work area for a drill without casting a shadow includes a tool bit that can be inserted into a chuck of a power drill. The tool bit has a well integrated therein for insertably receiving an additional tool bit. A cylinder is provided and the tool bit extends through the cylinder. A lighting unit is integrated into the cylinder to emit light outwardly from the cylinder when the lighting unit is turned on. In this way the lighting unit can illuminate the work area without casting a shadow.