Abstract: The method of machining a workpiece with an edge-type rotary cutting tool resides in the following: the process of workpiece machining is carried out concurrently with the process of resharpening the rotary cutting tool. The resharpening of the rotary cutting tool is applied to the relief surface of the tool edge except for the cutting lip thereof, and a wear land left on the relief surface of the tool edge. The width of the wear land is maintained, in the process of machining, within the limits assuring the tolerance margin specified for the dimension of the workpiece being machined.

Abstract: The proposed cutting tool comprises a holder, wherein a working head is rotatably mounted. The working head carries at least one edge whose cutting lip is defined by intersecting of its face and relief surfaces. The cutting tool incorporates a chip-breaking device, according to the invention, which is essentially a plate made fast on the holder at an angle to the face surface of the edge to provide for chip disposal from the cutting zone and arranged in such a manner that one of its edges crosses the cutting lip of the tool edge and is located as close as possible to the edge face surface, provision being made for the working head to freely rotate.