A cutting tool has a cutting bite, a power path, and a housing. The cutting bite includes a cutting edge, a shank that holds the cutting edge, and a sensor attached to the shank. The power path has a first terminal connected to the cutting bite and a second terminal opposite to the first terminal, and supplies power to the sensor. The housing accommodates a battery that stores power to be supplied to the power path, and is connected to the second terminal.

A stationary machine tool for machining, in particular core drilling, comprising a tool stand with a first tool stand housing interior. A chip guidance system comprises a magnet, wherein the magnet is arranged in the first tool stand housing interior such that chips produced by a machining process and entering the first tool stand interior are deflected by the chip guidance system.

A fastener driving tool includes a shaft with a working region disposed at a first end of the shaft and configured to drive a fastener, a shank portion disposed proximate a second end of the shaft and configured to couple the shaft to a power tool, and a reduced diameter torsion zone disposed between the shank portion and the working region, the torsion zone extending from a first shoulder closer to the working region to a second shoulder closer to the shank portion. A length (L) and a radius (c) of the torsion zone have been optimized so that approximately half of breakages occur in the working region and approximately half of breakages occur in the torsion zone.

A vibration reducing device for a machine tool reduces vibration generated in a tool support body supporting a tool. The vibration reducing device includes an attenuation inducing member and a pressing and fitting mechanism. The attenuation inducing member is brought into contact with the tool support body so as to generate a frictional force in a direction in which it acts as a resistance to the vibration generated in the tool support body. The attenuation inducing member has a rigidity in a direction conforming to a contact surface between the attenuation inducing member and the tool support body, which rigidity is higher than that of the tool support body. The pressing and fitting mechanism fits the attenuation inducing member to the tool support body in a pressed condition.

A cutter holder assembly has a cutter holder, a collet disposed in the cutter holder and having a positioning groove and a mounting cavity, a cutter set mounted in the collet, and a resilience tightening set mounted in the mounting cavity of the collet. The cutter set includes a cutter body and a positioning protrusion engaged with a limiting groove of the positioning groove. The resilience tightening set includes a spring room, a spring disposed in the spring room, and a position ball movably disposed in and partially extending out of the spring room. The position ball is pushed by the spring to push the cutter set to keep the positioning protrusion tightly abutting against a surface of the limiting groove, thereby reducing a longitudinal assembling gap between the cutter set and collet.

A magnetic base for an electric power tool, in particular for a magnetic core drilling machine. The magnetic base having a base body, in which at least one first solenoid coil forming an electromagnet is accommodated in a receiving space, whose magnetic force is switchable between a maximum resulting holding force and a minimum resulting holding force. A first side that is adapted to be coupled with the electric power tool. An oppositely situated second side, which is adapted to be placed on a workpiece to be processed. The receiving space is designed such that an insertion of the at least one solenoid coil into the receiving space is possible only from the first side.

The invention relates to a device (10) for handling a clamping ram (100) which has a shaft (110) with a longitudinal axis (L) and a collar (112), with an arm (20) that can be moved in at least one spatial direction (X) with a first end (20a) on which a fastening unit (30) for fastening the clamping ram (100) is arranged, wherein the fastening unit (20) comprises a magnetic or magnetizable contact element (31) for magnetically fastening the clamping ram (100), as well as a method for changing a tool or a workpiece (300) on a machine tool (200) making use of such a device (10).

The invention relates to a device (10) for handling a clamping ram (100) which has a shaft (110) with a longitudinal axis (L) and a collar (112), with an arm (20) that can be moved in at least one spatial direction (X) with a first end (20a) on which a fastening unit (30) for fastening the clamping ram (100) is arranged, wherein the fastening unit (20) comprises a magnetic or magnetizable contact element (31) for magnetically fastening the clamping ram (100), as well as a method for changing a tool or a workpiece (300) on a machine tool (200) making use of such a device (10).