Abstract: The invention relates to a reversible cutting plate made from ceramic material for chucking in a cutting tool for machining cast materials, with each corner of the reversible cutting plate (9) having a minor cutting edge (5a, 5b, 5c, 5d) and a major cutting edge (4a, 4b, 4c, 4d). In order to remove cast-material shavings from the cutting edge, it is proposed that the corners of the reversible cutting plate (9) be ground, pressed or injected into approximately ¼ of the diagonal plane (D) and form a triangular face (3) and the triangular face (3) have at least one incline.

Abstract: The invention relates to a reversible cutting plate made from ceramic material for chucking in a cutting tool for machining cast materials, with each corner of the reversible cutting plate (9) having a minor cutting edge (5a, 5b, 5c, 5d) and a major cutting edge (4a, 4b, 4c, 4d).

Abstract: High speed milling or drilling tool of the type including a rotatable head which carries several circumferentially arranged cutting insert holders for reversible cutting inserts retained by dogs. Each insert has a pair of parallel top surfaces bounded by four orthogonal end surfaces, two of which are received against perpendicular sidewalls in an open pocket of the holder. Each top surface has at least one pair of elongate clamping indentations which are formed as surfaces of rotation and lie at a like angle .beta. to the adjacent end surface of the insert.