A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Sawing tool forms a surface structure on a road surface, has a shaft and number of diamond saw blades, each diamond saw blade has disc-shaped core with hole for placing on shaft. A segment is on outer circumference of core, and saw blades are arranged on shaft by disc-shaped core. Segments of adjacent diamond saw blades are in surface contact on longitudinal side, each segment formed from two layers adjoining one another in axial direction and extending in radial and axial direction. Axially adjoining layers of segment each have different wear resistances and wear resistance of layers in axial direction alternates over axially entire segment, so a furrow is formed by two layers adjoining one another, in order to set a grip and a noise level of the road surface. Axially adjoining layers of adjacent segments have different wear resistances forming an alternating layer structure over entire sawing tool.

A cutting tool (1) for producing a trench (2) in the ground (3) for laying cables (4), comprises a carrier device (5) which has a hub region (6) for connecting the cutting tool (1) to a rotary drive (7) and a peripheral region (8), wherein, arranged in the peripheral region (8) of the carrier device (5) are cutting segments (9) spaced from each other in an axial direction (10), wherein the carrier device (5) is in one piece and has a peripheral surface (11) at which are arranged raised portions (12, 13) which project from the peripheral surface (11) in a radial direction (14) and on which the cutting segments (9) are arranged.

An outer blade cutting wheel is provided comprising an annular thin disc base and a blade section of bonded abrasive grains on the periphery of the base. Provided that an imaginary range is delineated by two imaginary planes extending parallel to the planar surfaces of the base and tangent to widthwise side portions of the blade section and two imaginary circumferences defined about the rotational axis and extending tangent to inner and outer perimeters of the blade section, the blade section occupies 10-40% by volume of the imaginary range minus the region of the base, and the widthwise side portions of the blade section have a dented shape relative to the imaginary planes. The cutting wheel is capable of cutoff machining at a high feed speed while maintaining a high accuracy and a low cutting load.

An outer blade cutting wheel includes an annular thin disc base and a blade section of bonded abrasive grains formed on the periphery of the base. The blade section includes widthwise side portions each of which is provided with channels extending from an inner perimeter to an outer perimeter of the blade section. The cutting wheel is capable of cutoff machining at a high feed speed while maintaining a high accuracy and a low cutting load.

A diamond cutting tool (200; 200) for enabling a fast cutting start may include a rotatable main body (210) and a cutting portion (220). The rotatable main body may include a substantially circular periphery. The cutting portion may include an interlocking support assembly (280) and a plurality of notched cutters (270). The notched cutters may be disposed around the circular periphery extending outwardly from the main body. The notched cutters (270) may be formed of a first diamond-metal matrix. The interlocking support assembly (280) may be provided radially outwardly of the notched cutters and may include a softer diamond-metal matrix and/or a different diamond concentration therein than the first diamond-metal matrix. The interlocking support assembly may include a reinforcement portion (284) disposed between the notched cutters (270) and a top section (282) covering radially distal portions of the notched cutters.

This process for manufacturing a closed loop of cutting wire comprises manufacturing a cutting wire comprising a central core extending continuously between two free ends. The central core having a tensile strength higher than 1400 MPa. The process includes welding the two free ends together to form the closed loop of cutting wire, in which: the manufacture of the cutting wire comprises making the central core from a material that is solid-state weldable. The welding is a solid-state welding operation comprising crushing, at a temperature below the melting point of the material of the central core, one of the free ends against the other of its free ends until the two ends have interpenetrated and formed a single uniform body of material.

A machining tool (1) includes a tooth (3) having a tooth tip (4) being covered with cutting particles (5) to form a plurality of geometrically undefined cutting portions. The tooth tip (4) is designed to be asymmetrical. The machining tool (1) thus is a 2-in-1 machining tool including differently designed sides of the tooth tips (4) which are suitable for efficiently machining different materials.

A segment for an abrasive article is disclosed. The segment can include a segment body that can have a first face that can extend along a length of the segment body on a first side of the segment body and a second face that can extend along the length of the segment body on a second side of the segment body opposite the first side. A gullet wall can extend from the first face to the second face. The gullet wall can extend along a gullet. The segment can also include a recessed region that can extend into one or both of the first and second faces. The recessed region can include a gullet portion extending at least partially along the gullet wall.

A diamond tool is combined with a processing apparatus to process a workpiece. The diamond tool includes a shank, a segment, and an abrasion preventing part. The shank has a throughhole through which grinding powder generated during processing the workpiece by the processing apparatus is discharged outside. The segment is bonded to an end portion of the shank. The segment contacts and processes the workpiece. The abrasion preventing part is disposed on an adjacent portion among an outer surface of the shank adjacent to the throughhole to prevent abrasion of the outer surface during the processing of the workpiece.