Abstract: In a hard metal cutting blade arrangement with blade installation in a cylindrical chucking block for cutting sheets of materials, comprising a cutting blade of a hard metal in the form of an elongate plate body with a blade ground onto a front area thereof and a rear area forming a plate-like shaft, a cylindrical metal chucking block is provided through which an axial slot extends diametrically almost over the whole diameter with a slot width corresponding to the thickness of the shaft of the cutting blade and the cylindrical surface of the chucking block is cut back radially at both sides of the slot over the length of the chucking block.