Cartridge with fine-adjustment positioning click used on a boring bar

Abstract

A cartridge assembly for use on a boring bar includes: a main body having an internal thread disposed about an axis; a tubular shaft movable with respect to the main body along the axis, the shaft having an internal thread and a portion structured to receive a cutting mechanism; a torque-receiving assembly having a first and second threaded parts, the first threaded part cooperatively engaging the internal thread of the shaft, the second threaded part cooperatively engaging the internal thread of the main body; and an entrainment cover coupled to the torque-receiving assembly and rotatable with respect to the main body about the axis. The entrainment cover interacts with the main body in a manner that produces an indicating click upon rotation thereof, each click being indicative of a distance the shaft is displaced in regard to the main body as a result of the rotation of the entrainment cover.