Patent ID: 8727678

Claim:
A boring head comprising: a housing disposed about a central longitudinal axis, the housing having a first end adapted to be coupled to a machine tool and an opposite second end, the opposite second end having a cutting insert movably coupled thereto; and a movement transmission mechanism disposed at least one of on or in the housing, the movement transmission mechanism comprising: a rotatable member ring mounted to be rotatable relative to the housing; a balancing mass; and a main shaft disposed in the housing, the main shaft being rotatable about the longitudinal axis and operationally coupled to the ring, the balancing mass, and the cutting insert, wherein rotation of the rotatable member a predetermined amount causes movement of the cutting insert a corresponding predetermined amount in a first radial direction with respect to the longitudinal axis and movement of the balancing mass a corresponding predetermined amount in a second radial direction opposite the first radial direction, wherein the main shaft is operatively coupled to the rotatable member via a stepped gear having a larger diameter portion and a smaller diameter portion.