FIELD: process engineering.
SUBSTANCE: invention relates to machine building and may be used for boring. Double-sided tip comprises top side, bottom side and at least one lateral surface to connect said sides and to make at least one cutting edge. Top and bottom sides feature different outer profile and different geometry of chip groove and comprises identical inscribed circumference. Every top and bottom side comprises four indexable cutting edge. Invention covers the drill bit design with at least two double-sides inserts.
EFFECT: boring at large impact loads, longer life.
21 cl, 7 dwg
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