FIELD: cutting.
SUBSTANCE: cutting plate (10) has a shape of a rhomboid with four blades, two identical bases (14a, 14b) located opposite each other and four identical main sides (16a-16d) passing between two bases (14a, 14b). Each of four main sides (16a-16d) has straight main cutting edge (12a-12d) and auxiliary cutting edge (26a-26d) located across it. Main and minor cutting edges (12a-12d) and (26a-26d) of each main side (16a-16d) in each case lie in common cutting plane oriented parallel to contact surface (28a-28d) also available on main sides (16a -16d).
EFFECT: higher stability of cutting plate due to improved chip formation during machining.
14 cl, 8 dwg
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