Abstract: A four-sided insert for milling cutters with negative radial angle of the cutting edges for three-dimensional milling from a solid, which has an upper face, or rake face, that is delimited by four sides that constitute the cutting edges of the insert. The four sides are opposite in pairs and connected to corresponding sides of the lower face by lateral faces. Two opposite sides of these four sides constitute main cutting edges of the insert and the other two sides constitute secondary cutting edges. The lateral faces that connect the main cutting edges to the lower face of the insert have, proximate to one end or tip of the cutting edge, a positive lower relief angle that is greater than the lower relief angle, which can be positive or negative or nil, proximate to the other end or tip of the cutting edge.

Abstract: A four-sided insert for milling cutters with negative radial angle of the cutting edges for three-dimensional milling from a solid, which has an upper face, or rake face, that is delimited by four sides that constitute the cutting edges of the insert. The four sides are opposite in pairs and connected to corresponding sides of the lower face by lateral faces. Two opposite sides of these four sides constitute main cutting edges of the insert and the other two sides constitute secondary cutting edges. The lateral faces that connect the main cutting edges to the lower face of the insert have, proximate to one end or tip of the cutting edge, a positive lower relief angle that is greater than the lower relief angle, which can be positive or negative or nil, proximate to the other end or tip of the cutting edge.

Abstract: A double-edged cutting tip for a doubled-edged milling cutter with single cutting tip, the cutting tip having a part-circular cutting tip front portion and including two cutting edge points in a cutting tip vertex, which, as seen in the rotational cutting direction of a respectively associated cutting edge, are located below the center with respect to a cutting tip axial plane.

Abstract: A torque transmitting device between a shaft (1) and a body (3) having a bore appropriate for the shaft comprises a pin (12) received in mutually complementary and facing recesses in the shaft and the body (1, 3), respectively. The center (O) of the pin (12) is offset outwardly (as an alternative: inwardly) with respect to the circumferential line of the shaft (1) and the bore, respectively, so that an entraining force component does not only extend in tangential direction to the shaft surface and the bore wall, respectively, but has an inclination so that a radial component is created as well through which the position of the shaft (1) is defined without play within the bore of the body (3). This coupling can be provided such that the axis of rotation in operation is the same as the axis of rotation predetermined by manufacture.

Abstract: To increase the sturdiness and precision of a double-edged milling cutter having a single cutting tip, the cutting tip is inserted in a recess of a milling cutter body, with the recess being constituted by two spaced-apart opposite sidewalls. One sidewall is designed as a rigid sidewall. By way of a cavity extending transversely of the longitudinal axis of the milling cutter body, the thickness of the other sidewall is locally reduced across the entire width thereof, so that it is "elastic". The cutting tip is fixed between the two sidewalls by means of a mounting screw.

Abstract: The present invention pertains to a long cutting length milling cutter with inserts with hole with cutting edge inserts which are arranged on various levels in the axial direction from a front end of the said milling cutter body. The inserts of the various levels are arranged according to steps, whose mean height, excluding the thickness of the insert belonging to the step or seat, is not less than the thickness of the insert. The radial angle .delta., which is formed by the radius of the milling cutter body passing through the vertex of the cutting edge of an insert with the straight line parallel to the base of the insert and passing through the vertex of the insert, has an amplitude not less than 10.degree..