A circular tool for cutting material includes a support disc (11) and a plurality of cutting inserts (10) attached on a circumferential periphery of the support disc (11).

A method of processing a plate-shaped workpiece that includes layered bodies containing metal which are formed in superposed relation to projected dicing lines, includes the steps of holding the workpiece on a holding table, and, thereafter, cutting the workpiece along the projected dicing lines with an annular cutting blade, thereby separating the layered bodies. The cutting blade has a plurality of through holes defined in an outer peripheral portion thereof that cuts into the workpiece and extending through the cutting blade from a face side to a reverse side thereof, but not open at an outer peripheral edge thereof. The step of cutting the workpiece includes the step of cutting the workpiece while supplying a cutting fluid containing an organic acid and an oxidizing agent to the workpiece.

Aspects of the disclosure relate to a non-circular arbor design. In one such aspect, an apparatus comprising a circular saw blade is disclosed. Within such embodiment, the circular saw blade includes a non-circular arbor hole that is compatible with at least a first arbor drive shaft and a second arbor drive shaft. Here, it is further contemplated that the first arbor drive shaft has a first shape matching the non-circular arbor hole, whereas the second arbor drive shaft has a second shape different than the non-circular arbor hole. In a further aspect, another apparatus directed towards a non-circular arbor design is disclosed. For this embodiment, the apparatus includes a non-circular arbor drive shaft that is only compatible with circular saw blades having a non-circular arbor hole shape that match a shape of the non-circular arbor drive shaft.

A work tool (100) comprising: a cutting chain (110), a drive mechanism for driving the cutting chain (110), an annular member (120) arranged rotatably supported by one or more support rollers (130,140,150), wherein the annular member comprises a rim (230) adapted to support the cutting chain (110) during cutting, and a support wheel (160) arranged distanced from the annular member (120), wherein the cutting chain (110) is arranged supported on a rim segment (102) of the annular member (110) forming part of a cutting area of the tool (100) and supported on a rim segment (103) of the support wheel (160) in a direction away from the cutting area of the tool (100). An annular member and a method of producing an annular member are also disclosed.

A method for balancing disc blades comprising the steps of: determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis; calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade at a distance from the main axis lower than a predetermined maximum limit value; and forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis. The method improves the producibility of disc blades.

What is disclosed is a blade core for attachment with an endless chain assembly. The blade core is a generally circular disc having two opposing faces and a width between the faces. The blade core has a circumferential groove extending inward from the circumference of the blade core such that the drive links, or the tang of the drive links, extends from the chain located on the circumference of the circular disc inward in said groove. Ideally the width of the groove is proximate to the width of the drive link such that friction between the sides of the groove and the drive link prevent the chain from rotating along the circumference of the circular disc when the blade core and endless chain assembly are rotating to cut a material. Ideally the base of tie-strap-tie strap and tie strap-cutter assembly is the same as width of the rail to restrict lateral movement.

A depth restrained cutting device for preventing unintended contact with live wires includes a plate that is rigid. The plate is configured to couple to a cutting tool. A cutting edge is coupled to and extends radially from a circumference of the plate. A stop is coupled to a first face of the plate. The stop is dimensionally smaller than the plate. The stop is configured to contact a surface of a substrate that is to be cut, such as a polyvinyl chloride pipe, to prevent contact of the cutting edge with articles, such as wires, that are positioned in the substrate.

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.

Nuclear reactor vessel segmenting utilizing improved arc saw systems and methods.

A rotary reciprocating saw blade for a power tool comprises a blade body having an at least approximately rectilinear cutting edge, and at least two linear or strip-shaped impressions that each interconnect a respective two corner points of the blade body.