Abstract: The tool holder of the present invention provides a pivoted tool support mounted to a base and including a cam extending between the base and the pivoted holder for longitudinal movement. A drive follower extends between the cam and base to convert the longitudinal cam movement to pivotal motion of the holder with respect to the base to provide precise adjustment of a machine tool attached to an opposite end of the holder.

Abstract: A system for duplicating a master part includes a gauge for measuring changes in the dimension therein of a master part to be duplicated and for providing control signals representative of changes from a predetermined dimension. The control signals are applied to a control circuit for controlling an adjustable tool block associated with a machine tool for machining a workpiece in response to the control signals from the gauge to assure that the workpiece dimension conforms to that of the master part.

Abstract: A cutting tool holder for supporting a cutting bar is provided in which the radial distance between the axis of the cutting tool holder and the cutting edge of the cutting bar is adjustable. The cutting tool holder comprises a hub member having a tubular bushing rotatably mounted in an axial bore at the outwardly extending axial end of the hub member. The inner bore of the bushing is eccentric with respect to the axis of the hub member. The cutting bar is secured to a bar holder having a shank which is received in the eccentric bore. A circular drive plate is fastened across the inner end of the bar holder and prohibits both axial and rotational movement, but permits a radial movement of the bar holder within the eccentric bore. A first tubular and cylindrical bearing sleeve, constructed of a compressible material, is disposed between the bushing and the hub member.

Abstract: A cutting tool holder for rotatably supporting a cutting bar is provided in which the radial distance between the axis of rotation of the cutting tool holder and the cutting edge of the cutting bar is adjustable. The cutting tool holder comprises a hub member having one axial end secured to a rotating machine and an eccentric bore formed in the other axial end of the hub member. The cutting bar is secured to a bar holder having a shank which is rotatably received in the eccentric bore. A circular drive plate is fastened across the inner axial end of the bar holder and limits axial movement, but permits rotation of the bar holder within the eccentric bore. A compressible biasing member urges axial separation of the drive plate and the housing to functionally lock the bar against rotation during use.