CUTTER FOR MINING MACHINES Russian patent published in 2001 - IPC

FIELD: mining industry, particularly, cutters of actuating members of stoping and tunneling machines. SUBSTANCE: cutter includes conical working head having hard metal core and channel, cylindrical holder ending in shank with circular groove to receive retaining ring. Channel is located in zone of joint of cylindrical holder and conical working head and made two-plane with mutually perpendicular planes. Main working hollow of two-plane channel is located at right angle to plane of axial section of cutter and is turned relative to its axial line through angle of 10-45 deg. Its face is hardened, for instance, by flame chromium spraying. Two-plane channels are located on cutter uniformly and with the same angles of turn of main working planes relative to cutter axial line. EFFECT: higher stability of mining machine cutters. 3 cl, 8 dwg