Abstract: Tool for chip removing machining includes a shank having a clamping end and a cutting insert at an opposite end, plus a number of piezo-elements for dampening vibrations therein. A pair of cooperating, flat-shaped piezo-elements with lengths that are shorter than that of the shank, are placed on opposing sides of the shaft in an area adjacent to the region where the shank is secured in the machine wherein the direction of polarization of the piezo-elements is parallel to the longitudinal axis of the shank. The piezo-elements constitute actuators that are actively steerable through the application of a voltage from a source of electricity via a control device in the form of a logic control circuit, to thereby dampen the bending vibrations of the shank.

Abstract: A cutting insert for rotating cutting tools for chip-breaking metal machining is delimited by atop side, adjacent to which there are cutting edges, an opposed bottom side and one or several relief surfaces. In the topside is provided a first depression for accommodating a male-like protrusion on a clamping element for fixing of the cutting insert. In the bottom side is provided a female recess for cooperating with a male means on the seat of the cutting insert. By these male-female joints, it is guaranteed that the cutting insert is not flung out from the appurtenant seat, when it is submitted to extremely large centrifugal forces.

Abstract: In a chain saw guide bar which at its free end has a saw chain-supporting sprocket wheel journalled on a hub and surrounded by side plates of the guide bar, the side plates are embossed (shaped) in three concentric zones having progressive embossing depths providing, between the side plate and the sprocket wheel, a gap which progressively increases in width -- either step-by-step or continuously -- with the radial distance from the center of the sprocket wheel.