Abstract: A collet for retaining a work piece comprises a plurality of wedge segments, and each of the wedge segments has inner and outer surfaces which, when the segments are assembled, form a collet having a cylindrical bore and a frustonconical outer surface, and the segments are retained in aligned relationship within a nut attachable to the machine.

Abstract: A weld cleaning machine includes a frame which is secured by a roller chain immediately adjacent to a pipe having a weld to be cleaned. A rotary weld cleaning element is mounted to the frame on an oscillating arm such that the weld cleaning element oscillates along an oscillation axis oriented axially with respect to the pipe. A first motorized drive system is mounted on the frame to rotate the frame circumferentially around the pipe. A second motorized drive system is mounted on the frame to oscillate the weld cleaning element along the oscillation axis. A third motorized drive system is included in the oscillating arm to rotate the weld cleaning element. The weld cleaning machine is controlled remotely via a control cable and a control panel such that the operator can stand some distance from the pipe being cleaned. Preferably the machine automatically performs a programmed sequence of motions to clean a strip of substantial width along the axis of the pipe.

Abstract: A squaring machine has an elongate housing with a rotatable spindle extending from one end thereof and attached to which is a tool for squaring the end of work piece. At the opposite end of the housing are first and second feed members, the first feed member in the form of a screw which is locked against axial movement within the housing, and the second feed member in the form a nut which is locked against rotation with respect to the housing. The feed nut is rotatably connected to an end of the spindle such that rotation of the feed screw will cause axial movement of the spindle. Also, the machine includes a first and second removable retainers, each of which has a pair of opposing jaws for clamping around a cylindrical work piece, however, the jaws of the first retainer are for grasping a work piece of a different size than the jaws of the second retainer.

Abstract: A squaring machine has an elongate generally cylindrical housing with an axially mounted motor at one end of the housing which rotates a shaft extending through the axis of the housing. The shaft is longitudinally moveable within the housing, and a non-rotatable inner sleeve is fitted around the shaft and is fixed for longitudinal movement with the shaft. The housing has a feed ring which is axially slidable but non-rotatably fixed around the tubular section, and a pin extends through a slot in the housing and the pin is connected to both the feed ring and the inner sleeve such that the feed ring, the inner sleeve, and the shaft move longitudinally in unison with respect to the housing. Rotation of a feed nut, which threadably engages the feed ring, causes axial movement of the feed ring along the tubular portion of the housing, and simultaneous axial movement of the shaft.

Abstract: A squaring machine has an elongate housing with a rotatable spindle extending from one end thereof and attached to which is a tool for squaring the end of work piece. At the opposite end of the housing are first and second feed members, the first feed member in the form of a screw which is locked against axial movement within the housing, and the second feed member in the form a nut which is locked against rotation with respect to the housing. The feed nut is rotatably connected to an end of the spindle such that rotation of the feed screw will cause axial movement of the spindle. Also, the machine includes a first and second removable retainers, each of which has a pair of opposing jaws for clamping around a cylindrical work piece, however, the jaws of the first retainer are for grasping a work piece of a different size than the jaws of the second retainer.