TOOL FOR PRECISE WORKING Russian patent published in 2000 - IPC

FIELD: precise reaming of surfaces of openings in metallic blanks. SUBSTANCE: reamer is provided with cutting tip and two guiding strips belonging to tip. First guiding strip lags in rotation direction by angle equal approximately to 40 degrees relative to cutting tip. Second guiding strip is arranged opposite to cutting tip. Reamer is provided with first additional cutting tip arranged in such a way that it leads in rotation direction by angle equal approximately to 40 degrees and(or) with second additional cutting tip arranged opposite to first guiding strip. Reamer may have three, four or five cutting tips. Two guiding strips and cutting tip may be arranged at least by two Y-shape figures. EFFECT: enhanced efficiency of tool operation. 7 cl, 3 dwg