A tool system includes a machine-proximal shank configured to be introduced into a driven tool receptacle and containing a device for transferring a rotating movement to be picked up from the driven tool receptacle. A tool-proximal shank is configured as a tool holder or to have a tool holder releasably connected thereto. A gear mechanism disposed between the machine-proximal shank and the tool-proximal shank is configured to transfer a rotating movement transmitted by the device in a reduced manner to the tool-proximal shank. At least one insert seat configured on the tool holder for receiving an interchangeable cutting insert is provided on an end face of the tool holder extending transversely to a longitudinal axis of the tool holder. A method for machining a workpiece is also provided.

A device (10) for the automatic connection of a high speed spindle (40) to a numerically controlled machine is described, comprising a first connecting element (11) and a second connecting element (31), the first connecting element connection (11) comprising a first electrical contact element (14) and a first duct (12) for the passage of pressurized air; the second connecting element (31) comprising a second electrical contact element (34) configured to establish an electrical contact with said first electrical contact element (14) and electrically power the spindle at high speed (40), and a second conduit (32) for the passage of the pressurized air coming from the first duct (12); a method is also described for automatically sealing the first and second connecting elements (11, 31) of the device (10).

A spindle assembly configured to be assembled in a machining device. A front cover of the spindle assembly includes passages to allow high pressure fluid to flow towards the blades of the turbine and rotate the turbine; openings located at the front end of the front cover may allow low pressure fluid to flow out of the spindle assembly; passages extending from behind the turbine to the front end of the front cover may allow collection of low pressure fluids that flow towards the rear end of the spindle after hitting the blades of the turbine and to direct these fluids towards the front end of the front cover and out of the spindle assembly. The housing of the spindle assembly may include a rear section configured to be assembled onto the machining device.

A tool coupling device for coupling a tool can comprise a drive shaft for coupling to the drive, an output shaft for coupling to the tool, the output shaft being rotatable about a central axis (A), a transmission unit connected between the drive shaft and the output shaft and translating a rotational movement of the drive shaft at an input speed (n.sub.S) into a rotational movement of the output shaft at an output speed (n.sub.W) greater than the input speed (n.sub.S) and a non-rotating housing, wherein the transmission unit, and at least a part of the input shaft and a part of the output shaft that are both coupled to the transmission unit, are arranged within the housing, wherein the drive shaft is rotatably mounted on the housing; and wherein the output shaft is rotatably supported solely on the input shaft and is not rotatably supported on the housing.

The present invention provides, in an embodiment, a gear-shifting structure of power equipment, the gear-shifting structure comprising: first and second gears having shafts concentric with a first shaft, respectively, the first and second gears being positioned at different locations along the axial direction of the first shaft, the first and second gears having protrusions formed thereon, respectively, and the first and second gears freely rotating with regard to the first shaft; a clutch disposed concentrically with the first shaft between the first and second gears, the clutch being spline-coupled to the first shaft, and the clutch having engaging members formed thereon so as to protrude toward the first and second gears, respectively; an adjustment member configured to move the clutch toward the first gear or the second gear; a second shaft; and third and fourth gears having shafts concentric with the second shaft, respectively, the third and fourth gears being disposed to engage with the first and second gears and to rotate together with the second shaft. The engaging members of the clutch engage with the protrusion of the first gear or the second gear by means of the adjustment member.

Electric spindle for numerical control machines structured to lock and rotationally drive a tool about a predetermined reference axis locally coinciding with the longitudinal axis of the tool; the electric spindle comprising: an outer structural casing that is structured to be rigidly attachable to a generic numerical control machine; an electric motor that is housed within the structural casing and is provided with a drive shaft, which projects/emerges with its front end outside the structural casing while remaining locally coaxial to the reference axis of the electric spindle; a rotating thrust-bearing bushing or sleeve, which is fitted in an axially rotatable manner on the front end of the drive shaft via interposition of a first set of annular rolling bearings, and is maintained coaxial to the reference axis of the electric spindle by a second set of annular rolling bearings, which are interposed between the rotating bushing or sleeve and the structural casing; and at least one disassemblable tool-holder head that is structured to be attachable, in a rigid and stable though easily releasable manner, to the front end of the drive shaft, is structured so as to accommodate and retain, in a rigid and stable though easily releasable manner, the shank of a generic tool for numerical control machines, and is provided with a peripheral crown that is dimensioned/structured to stably abut, selectively and alternatively, on the front end of the drive shaft or on the rotating thrust-bearing bushing or sleeve.

A drill press has variable speed drive via belts on stepped pulleys that transfer rotational force from the motor to the drill press spindle. Three stepped pulleys connected by two belts are provided in the example. A belt tension roller is bears against one of the belts to provide tension for effective power transfer from the motor to the spindle. The belt tension roller is adjustable along an arcuate slot in an anchor plate and is fastenable in position by an adjustment knob on the belt tension roller. The middle pulley is mounted to vary its position so that tension adjustments on one belt by the belt tension roller result in tension adjustments on the second belt as well.

A device (10) for the automatic connection of a high speed spindle (40) to a numerically controlled machine is described, comprising a first connecting element (11) and a second connecting element (31), the first connecting element connection (11) comprising a first electrical contact element (14) and a first duct (12) for the passage of pressurized air; the second connecting element (31) comprising a second electrical contact element (34) configured to establish an electrical contact with said first electrical contact element (14) and electrically power the spindle at high speed (40), and a second conduit (32) for the passage of the pressurized air coming from the first duct (12); a method is also described for automatically sealing the first and second connecting elements (11, 31) of the device (10).

A tool system includes a machine-proximal shank configured to be introduced into a driven tool receptacle and containing a device for transferring a rotating movement to be picked up from the driven tool receptacle. A tool-proximal shank is configured as a tool holder or to have a tool holder releasably connected thereto. A gear mechanism disposed between the machine-proximal shank and the tool-proximal shank is configured to transfer a rotating movement transmitted by the device in a reduced manner to the tool-proximal shank. At least one insert seat configured on the tool holder for receiving an interchangeable cutting insert is provided on an end face of the tool holder extending transversely to a longitudinal axis of the tool holder. A method for machining a workpiece is also provided.