FIELD: mining.
SUBSTANCE: hand drill comprises a rod having a sharpened lower portion and provided with a handle in the upper portion, and a cutting unit positioned above the sharpened portion and made of two half-discs with sharpened rectilinear edges, and fixed on the rod in such a way that their planes form an angle therebetween. The rod has hollow tubular design with end incisions in the lower portion and a double hole in the upper portion for replaceable handle. The cutting unit is made of two half-disc half-ovals with sharpened rectilinear edges-larger half-axes of half-ovals.
EFFECT: increase of labour productivity and convenience of use for hand drilling of wells, including holes deeper than the length of the rod.
3 dwg
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