Cutting knife, in particular for machining materials can be easily machinability

摘要

The blade made of e.g. hard metal comprises a flat rectangular plate with at least one longitudinal cutting edge, with almost its whole surface clamped onto a substrate e.g. the side surface of a radial groove in a cutting head. The blade has a t least one opening extending perpendicularly to its large surfaces, for fastening means. Between the opening the side edges and/or between the openings is at least one recess of which the contours are in the shape of a cone section of which at least the major axis is longer than the dia. of the opening for the fastener. The recesses may be circular, or elliptical with the major axis extending parallel to the cutting edges and with a reinforcing rib extending in the direction of the minor axis.