FIELD: technological processes.
SUBSTANCE: invention relates to machining of materials by cutting and can be used in drilling holes in hard-to-process metal materials or composite materials reinforced with fiber. Proposed method comprises forming hole to process processed section of material, at that, processing lubricant, having sheet form, is in contact with drill and/or treated section. Drill for formation of hole comprises at least one cutting edge and front surface adjacent to cutting edge. Front surface has surface roughness Ra of 2.0 mcm or more and 3.0 mcm or less. In processing, processing lubricant is retained on front surface.
EFFECT: disclosed are a drill bit and a method of forming holes.
7 cl, 2 dwg, 2 tbl
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