DRILLING HEAD Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: drilling head has housing 1, polyhedral rotatable cutting plate 2 arranged in movable rotatable unit 3 and secured to housing 1 of the drilling head with screw 4. Adjusting screw 5 interacts with the rotatable unit through collar 6 received in groove 7 of rotatable unit 3. On the outer side of the drilling head are two guides that serves for orienting in an opening to be drilled. Chip is removed through a discharging passageway provided in the housing of the drilling head. The head is adjusted in the following manner. By rotating adjusting screw 5 it moves axially. Collar 6 of the screw received in groove 7 of the rotatable unit sets the rotatable unit and, hence, cutting plate 2 in rotation. In rotation the top of the cutting edge moves radially. After adjusting the rotatable unit is additionally locked with a screw. EFFECT: improved design. 2 dwg