A harvesting knife has a base body, which is configured to be applied in a manner rotating in a machine around a drive rotational axis allocated to said base body, and having a plurality of teeth on its circumference. Prior to a first application, at least one of the teeth has at least one cutter formed thereon.

The present disclosure relates to a cutting blade (3) for a clearing saw (1), the cutting blade (3) having a plurality of teeth (11), at least some of which comprise a leading edge (19), a trailing edge (21), and a point (17) in between the leading and trailing edges. The trailing edge (21) is hardened to a depth in the range 0.02-1.5 mm, and the leading edge (19) is left unhardened. This provides a cutting blade with increased durability and efficiency, that can still be filed manually to remain sharp.

A machine-driven saw blade including (1) a blade body having a blade body edge with a plurality of primary saw teeth for cutting during blade movement in a first direction, the primary teeth spaced at a primary tooth pitch and each having a primary tooth tip and primary-tooth leading and trailing edges and (2) at least one secondary saw tooth on the trailing edge of a subset of primary saw teeth, the at least one secondary saw tooth having a secondary tooth tip and a secondary-tooth leading edge configured for cutting during blade movement in a second direction opposite the first direction.

A tool device for a hand-held power tool, which can be operated such that the tool device is rotated about an output shaft of a tool-holding device, has at least one connecting device, which is detachably connected to an output shaft of the power tool. The connecting device is fastened to the tool-holding device so that a drive axis of the output shaft and a tool axis of rotation substantially coincide. The connecting device has a cut-out and at least one clamping wing, which at least partly bounds the cut-out in the radial direction of the tool axis of rotation and which is bounded substantially in the direction radial to the tool axis of rotation by a first bounding edge, which lies on a first bounding circle around the tool axis of rotation. The clamping wing extends at least substantially along a plane orthogonal to the tool axis of rotation.

A method of removing an arbor from a saw blade. The arbor includes an arbor body, a central bore formed through the arbor body, and an aperture formed through the arbor body and separate from the central bore. The method includes inserting a tool into the aperture, pivoting the tool inside the aperture to at least partially separate the arbor body from the saw blade, lifting the tool away from the saw blade to at least partially separate the arbor body from the saw blade, and removing the arbor body from the saw blade after the arbor body is sufficiently separated.

An impact cutter blade and holder system is disclosed. The impact cutter blade and holder system includes: a cutter disk, a plurality of impact holders, and a plurality of impact cutter blades. The cutter disk has a central axis about which the cutter disk is configured to rotate. The plurality of impact holders are secured to the cutter disk. The plurality of impact cutter blades is secured to the plurality of impact holders.

The invention discloses a non-toothed hard alloy tipped circular saw blade, comprising: a non-toothed structure steel plate with smooth outer edge; a plurality of hard alloy tips arranged in ordered array along the outer edge of the steel plate and can be sharpened according to requirements. The invention further explains how to make local structural adjustment to the saw blade according to the basic principle of the invention under the conditions of welding with solder and without solder; the saw blade in the invention has wide market prospect in portable electric power tools and battery power tools, improving the safety, cutting accuracy and versatility of the saw blade remarkably.

A cutting tool for cutting a metal workpiece includes a first portion, and a second portion. The first portion includes a first outer surface, a first shaft, and at least one cutting insert attached to the first outer surface. The second portion includes a second outer surface and a second shaft. The first and second shafts are disposed coaxially around an axis. The first and second outer surfaces are disposed adjacent to one another. The first and second outer surfaces are configured to rotate around the axis in opposite directions.

A single-hand operable portable hand-held saw, including a handle portion with a motor. The motor is operably connected to one or more drive gears positioned on an interior side of a protective cover. One or more idle gears are positioned on an interior side of the protective cover. The idle gears and the drive gears are operatively coupled with and rotatably engaged with an annular saw blade. A throat opening in the protective cover is positioned adjacent a stop guide for stabilizing the saw against a material during cutting operations.

Arc saw blades and systems and methods for segmenting components utilizing improved arc saw blades.