Tools are described having removable working elements, include saws having removable cutting elements. Interface geometries on one or more of a core structure and removable elements may be simple or complex geometries. Securement elements releasably hold the removable elements in place.

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 box-joint blade system includes left- and right-directed blades that each include a saw plate, a set of saw tips, and a set of gullets disposed between the tips. The tips of each blade are axially offset from the saw plate in opposite directions, such that the blades may be mounted on the axis of the saw in either a first configuration, with left and right saw tips outwardly offset and producing a wide cut, or a second configuration, with the tips inwardly offset and producing a narrow cut. In at least the second configuration, the tips of each blade are disposed within the gullets of the other. The tips optionally have a positive hook angle of up to 20 or more, to produce a smooth, flat-bottomed groove in a workpiece.

A saw blade includes an elongated body with a working edge extending along a longitudinal axis. A first strip composed of carbide or cermet and including at least one first full cutting tooth is coupled to a first portion of the working edge by a first weld fusion zone composed of a ductile material. The first strip is set in a first direction at a first angle out of a plane of the body by a first bend in the first weld fusion zone. A second strip composed of carbide or cermet and including at least one second full cutting tooth is coupled to a second portion of the working edge by a second weld fusion zone composed of a ductile material. The second strip is set in a second direction, opposite the first direction, at a second angle out of the plane of the body by a second bend in the second weld fusion zone.

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.

A tube cutting device for cutting a tube of a waste steam generator including: a body configured to transmit power; a tube-shaped rotary body provided on a side surface of the body and having a horizontal rotary shaft configured to rotate with the power supplied from the body; a plurality of clamps provided along an outer peripheral surface of a first end portion of the rotary body and configured to fix the rotary body to the tube to be cut; a saw provided on a second end portion opposite to the first side end portion of the rotary body and configured to rotate together with the rotary body to cut the tube; and a fitting member configured to be inserted into a hollow portion formed on a center portion of the saw.