FIELD: drill engineering. SUBSTANCE: instrument has a body, clockwork, rod, spring- loaded piston with spherical convex surface and clamping member with reciprocal surface. A ball is placed between the clamping member and the surface. Additionally the instrument is equipped with closing device connected through the rod to the piston with a rest pin made on upper face surface of the closing device. A seat is made on rod tail which corresponds to the rest pin with upper portion supplied with a sliding ball. EFFECT: accurate instrument. 2 cl, 2 dwg
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Authors
Dates
1995-02-27—Published
1993-10-08—Filed