Abstract: A grinder assembly includes a grinder support device positioned within a pipe section and has a support shaft extending along the longitudinal axis of the pipe. A grinder is supported from the support shaft by means of a connector secured to the body portion of the grinder. The grinding wheel is positioned in abutting relation with the edge of the pipe and the support shaft being rotatably mounted on the grinder support permits the grinding wheel to rotate around the periphery of the shaft. There is an adjustment device for the support shaft where the angularity of the support shaft, the grinder, the connector and the grinder wheel face can be adjusted angularly relative to the longitudinal axis of the pipe section to compensate for an edge portion of a pipe that is cut at an angle other than perpendicular to the longitudinal axis of the pipe.