FIELD: process engineering.
SUBSTANCE: invention relates to drilling appliances. This device comprises handle and tightening clamp to fix the latter at drill body. Said handle accommodates laser source and optical hardware to focus laser light to fibre waveguides for its transmission outward parallel with the frill rotation axis, two light beams being directed to working surface and one light beam to side opposite the direction of drilling. Two waveguides are arranged inside hollow bar secured at said handle or said clamp. Bar rear end is furnished with light shutter to shut off the light beam directed to side opposite the drilling direction not used in drilling. Coaxial bubble gage is arranged at handle end.
EFFECT: invariable drill orientation relative to workpiece.
6 cl, 3 dwg
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