A self contained power driven, adjustable tube cutting tool is disclosed. Within the main tool housing is a rotatably mounted C-shaped body having an adjustable automatic cutter feeding and retract mechanism therein, operable by the rotational movement of the body about the pipe axis. Opposing a set of pipe backup rollers is a cutting wheel attached to post slidable through the center bores of two mating cylindrical bodies all on a common longitudinal axis. The mating faces are spirally configured through a single rotational turn to create linear expansion and contraction of the bodies as one, integrally attached to a ratchet wheel, rotates while the other does not. A spring biased pawl couples the non-rotational body to the sliding post. The ratchet wheel engages a second spring biased driving pawl pivotally attached to a cylindrical sliding roller body which protrudes from the periphery of the cutting wheel body. A stationary semicircular cam track is fixed within the main tool housing adjacent to the cutting wheel body periphery. As the body is rotationally driven the roller follows the profile of the cam track and hence the driving pawl moves in a radial direction inward to the pipe axis engaging and rotating the ratchet wheel, thus the two cylindrical bodies are then expanded and move the post and cutter in radially towards the pipe axis as it cuts.