DISK BIT OF MILLING TYPE Russian patent published in 1998 - IPC

FIELD: drilling machinery and equipment. SUBSTANCE: disk drilling bit has body. Installed in central part of body is thrust sector, and installed in slots of body are working disks which can slip over surface of work face due to braking caused by forces of friction between sliding supports of working disks and thrust sector. Thrust sector can be longitudinally displaced relative to sliding supports of working disks. This can be realized for example by means of spring intended for adjusting speed of their rotation depending on drilling conditions. Application of disk drilling bit of milling type widens technological potentialities of this drilling tool especially in drilling rock matter of various physical and mechanical properties. This is achieved due to adjustment of frictional force in sliding supports and adjustment of rotating speed of working disks in work face. EFFECT: higher efficiency. 1 dwg