FIELD: process engineering.
SUBSTANCE: proposed device comprises recess to receive plate made on outer periphery of cutting head, and guide plate screwed to aforesaid recess by means of set screw and intended for sliding contact with inner periphery of drilled bore. Guide plate has outer surface shaped as convex curvilinear surface that kames upper ridge along guide plate central part and inclined at 10 to 40 degrees to device axis. Note here that guide plate is attached inclined to device cutting head so that its side, closer to device front end, extends forward toward rotational direction of the device further compared with its side closer to its rear end.
EFFECT: higher accuracy of machining.
3 cl, 8 dwg
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