Abstract: The invention provides a milling cutter for machining metal workpieces and a cartridge therefor. The milling cutter comprises a plurality of peripheral recesses for the receipt of insert-equipped cartridges. One of the walls of said recess is provided by two arms integral with the milling cutter body that each by means of a screw is arranged to clamp the cartridge against one wall in said recess. The cartridge is provided with two bores having suitable clearance for the receipt of said screws.

Abstract: A rock drill bit of the impact type comprising a boring head, a shaft having ridges, a front surface and a number of peripherally spaced holes receiving inserts, said holes extending forwardly and outwardly at an acute angle .phi. with respect to the center line of the drill bit. The guiding surface of the insert mainly coincides with the jacket surface of the bit body when the insert has been fixed in the hole which emerges into both the jacket surface and the front surface of the bit body. This means that the guiding surface partly extends on both sides of the plane of the front surface.