Gyro-stabilized tool bit and wide mouth tool bit mounting chuck

摘要

A tool bit includes a shaft portion having a mounting end for insertion into a bit receiving opening of a chuck, having a working end, and having an average radius and a longitudinal axis, a flywheel portion, between the mounting end and the working end, having an average radius greater than the average radius of the shaft portion and greater than the average radius of the receiving opening of the chuck, and having a center of gravity, the flywheel portion being connected to the shaft portion such that the flywheel portion center of gravity is located substantially on the shaft portion longitudinal axis, the shaft portion, the mounting end and the flywheel portion being joined together as a single unified structure. A chuck for receiving the tool bit includes a receiving tube for receiving the mounting end of the tool bit, a port in the receiving tube for laterally receiving a locking ball, such that the port can align with the depression so that the locking ball can enter the depression, a camming tube having an inner wall and slidably mounted over the receiving tube, comprising a camming portion protruding from the inner wall and comprising a central camming portion recess into which the locking ball can move so that, when the recess aligns with the port, the locking ball can roll out of the depression and into the recess, thereby releasing the tool bit mounting end, the camming portion also comprising a shoulder on one side of the recess for forcing the locking ball to protrude through the port and lock into the depression.