APPARATUS TO DRILLING MACHINE TOOL FOR REAMING OPENINGS AT BACK SIDE Russian patent published in 2004 - IPC

FIELD: processes and tools for metal cutting, working holes. SUBSTANCE: apparatus includes housing in which reamer is mounted, carrier in the form of drill mounted in spindle of machine tool with possibility of straight axial motion in opening of reamer, stop secured to reamer normally relative to its axis and open to its opening with possibility of engaging with carrier; sleeve for placing reamer and spring arranged between reamer and spring. In order to enhance operational reliability of apparatus at using drills with large inclination angle of helical cuttings groove, apparatus is provided with limiter (in the form of bridge) of drill motion in opening of reamer. EFFECT: improved design, enhanced operational reliability of apparatus. 2 dwg