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

FIELD: rock-crushing tools. SUBSTANCE: this relates to rock-crushing tools of rotary cutting type. Disk bit has body with threaded connecting nipple in its upper part. Secured in its lower part in lugs is horizontal axle. Eccentrically mounted on each end of horizontal axle are working disks. Lugs are made symmetrical. Working disks are mounted on bushes which are made with eccentricity directed horizontally in different sides from central bit rotation axis. Bushes are freely mounted on horizontal axle of polyhedral cross-section for possible adjustment of bit diameter due to eccentricity of bushes and clearance between working disks. This can be achieved for example by means of adjusting washers. Beside that, working disks are installed on external surfaces of bushes with creation of sliding friction bearings. Operating potentialities of milling-type disk bit are thus widened. EFFECT: higher efficiency. 1 cl, 4 dwg