Abstract: An automatic centering pipe beveling machine having a yoke with two leg portions extending from an apex, the angle between the legs of the yoke being X.degree. and the yoke being positionable on a cylinder with the legs in engagement with the cylinder exterior circumferential surface, a frame slideably supported on the yoke and moveable in the plane perpendicular the cylindrical axis and simultaneously in the plane of the cylindrical axis including the yoke apex, the frame having a ring portion supporting a cutting torch, and a feeler extendable perpendicular to the surface of the cylinder received by the yoke and moveable towards the cylinder surface in a fixed relationship with the movement of the frame relative to the yoke, the ratio of movement of the feeler to the movement of the frame being 1 - SinX/2/1 so that the torch supporting circular member is centered with the cylinder when the feeler contacts the surface of the cylinder.