A textured surface in an outer surface of a tool holding section of a tool holder for increasing a surface area of the outer surface for dissipating heat from the tool holding section. The textured surface can comprise grooves around the outer surface of the tool holding section with a height and a width. Notches can be provided in sides of the grooves to further increase the surface area of the outer surface for dissipating heat from the tool holding section.

A minimum quantity lubrication (MQL) tool including a lance. The lance includes a passageway and an orifice. The passageway extends axially from a first end of the lance toward a second end of the lance and allows a lubricant supply to flow therein from the first end of the lance toward the second end of the lance. The first orifice extends radially through the lance at a location near the second end of the lance. The lubricant supply flowing through the passageway exits the orifice and is impinged upon by air flowing around the lance.

A deburring tool includes a body including a cylinder chamber having a tool holder holding hole, and an anti-rotation body holding hole; a tool holder having an anti-rotation groove and disposed in the cylinder chamber to reciprocate in the cylinder chamber; a first elastic body disposed inside the cylinder chamber to urge the tool holder toward a distal end; a cover disposed outside the body to reciprocate between a detaching position and a processing position, the cover including, a pressing surface that covers the anti-rotation body holding hole at the processing position, and a relief portion; and an anti-rotation body accommodated in the relief portion when the cover is positioned at the detaching position and the tool holder is pulled from the tool holder holding hole.

Improvements in a self-balancing tool holder or material removal machine that allows for greater accuracy of material removal. The balancer is able to self-adjust, any changes in the assembly are automatically adjusted. The adjustment can account for tool wear, accumulation of debris on the tool and balancing at different speeds of rotation. The tool holder balancer can be a mechanical fastener, shrink fit or bonding to the tool holder or material removal machine. The balancer uses a plurality of balls or any form of movable weight in the ring to provide the balance. The plurality of balls or media can freely move around the inside of the ring to offset any imbalance. The balls roll or spin to unique positions to provide a dynamic balance. The number and size of balls or weighted media is selected based upon the maximum amount of dynamic balancing that is required.

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 hydraulic expansion chuck for accommodating a machining tool, comprising a main chuck body that has a first chuck portion for fastening to a chuck connection as well as a second chuck portion for clamping the machining tool, wherein the second chuck portion includes a substantially cylindrical cavity, and wherein at least a first chamber and a second chamber for holding a fluid are arranged within the second chuck portion in such a way as so peripherally surround at least some sections of the cavity, and said first chamber and second chamber are designed in such a way as to bulge and reduce a cross-section of the cavity in at least some sections when the pressurized fluid is admitted into the chambers, the first chamber and the second chamber being positioned at an angle to one another.

A screw-in tool and a tool holder for such a screw-in tool. The screw-in tool contains a tool head and a tool shank having an outer thread and a supporting region arranged between the tool head and the outer thread. The supporting region is formed by two conical bearing faces having different cone angles.

A high-speed low runout spindle assembly is provided. The spindle assembly includes a friction drive wheel configured to be coupled to an output shaft of a motor. The friction drive wheel is configured and disposed to directly contact a shank of a bit. A set of bearings is configured to contact the shank of the bit. A bit clamp assembly includes a clamp bearing having a central through-hole dimensioned to accept a lower portion of the shank of the bit. The bit clamp assembly is configured to hold the bit in contact with the set of bearings.

The invention relates to a cutting tool, particularly for use in a tool chuck of a machine tool, including a tool shaft with a center longitudinal axis and a tool head. The tool head is connected to the tool shaft via a positive-locking connection, which locks the movement in the direction of the center longitudinal axis and the positive-locking connection is supplemented by a bonded connection, particularly a soldered connection.

A rotatable chuck for clamping a shank portion of a rotatably operating machining tool includes a rotatable chuck body provided with a cylindrical bore concentric with a rotation axis of the chuck body. The circumferential surfaces of a clamping portion of the bore are arranged to apply a clamping force around the circumference of the shank portion of the tool when it is mounted in the chuck to fixate the tool in the chuck. The chuck is provided with auxiliary pull out preventing means for preventing inadvertent pull out of the tool in the axial direction of the bore during machining operation, as well as auxiliary rotary preventing means for preventing inadvertent rotation in at least one direction in relation to the chuck during machining operation. The auxiliary pull out and rotary preventing means include an attachment member positionable in an inner portion of the bore and attachable to the shank portion to be clamped, such that the tool and the attachment member will be prevented from being pulled apart in the axial direction and from being rotated in at least one direction in relation to each other.