Abstract: A boring machine for use in mining having a base, a hydraulic motor and a cutting member. The hydraulic motor includes a pair of hydraulically activated oscillating drive units, a cylindrically shaped rotating shell, a cylindrically shaped stationary shell and a pair of cam units. The oscillating drive units are contained within the stationary shell, and extend along the longitudinal axis, each of the drive units has an arm that is adapted to extend along the longitudinal axis and a cam driver secured to the arm. The stationary shell is rotatably coupled to the rotating shell and has elongated slots adapted to coact with the cam drivers so as to longitudinally guide the cam drivers and prevent the cam drivers from rotating about the longitudinal axis. The cam units are secured to an inner surface of the rotating shell.