ADJUSTABLE DIAMOND REAMER Russian patent published in 2002 - IPC

FIELD: metal working, namely making precise openings in parts, for example in slide valves of housings of hydraulic aggregates. SUBSTANCE: reamer includes body in the form of cylinder having deformable portion and expanded by means of cone mandrel. Reamer also includes arranged uniformly along its perimeter rows of diamond blocks. Surface of diamond block is partially conical and partially cylindrical. In order to increase efficiency and working quality, deformable portion of reamer body is in the form of expanding clamp; its length consists 0.2-0.5 of body length. Cylindrical surfaces of diamond blocks are arranged on deformable portion. Inclination angle of common generatrix of cone surface of diamond blocks is equal to (10- 30)". EFFECT: enhanced operational capability of tool, improved working quality. 3 dwg