FIELD: process engineering.
SUBSTANCE: invention relates to machine building and may be used in machining materials by drill with indexable cutting plates. Drill comprises body with chip-removal flute extending from front end surface to rear end side in direction of rotational axis, cutting plate seat made at front end side in direction of rotational axis, chip-removal flute first surface facing the drill rotational direction and cutting plate plugged in its seat. Drill body has chip forming section including at least whatever set of ledges extending outward from second working surface and set of recesses at second working surface at, at least, front end section of second working surface of chip-removal flute that faces the drill rotational direction.
EFFECT: reliable chip removal in long-term operation.
13 cl, 8 dwg
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