Abstract: A tool bit for a tube end squaring tool includes a cutting edge produced by machining or grinding a hook radius in the tool bit stock on the entrance angle side of the cutting edge and an undercut portion within the hook radius just rearwardly of the cutting edge on the work entrance side thereof to cause separation from the hook radius area of metal chips parted from a metal workpiece by the cutting edge to reduce friction and workpiece metal buildup on or adjacent the cutting edge. The undercut configuration reduces manufacturing costs of the tool bit which otherwise would require additional finishing operations to obtain the same reduction of friction at the cutting edge area.

Abstract: A tool bit for a tube end squaring tool includes a cutting edge produced by machining or grinding a hook radius in the tool bit stock on the entrance angle side of the cutting edge and an undercut portion within the hook radius just rearwardly of the cutting edge on the work entrance side thereof to cause separation from the hook radius area of metal chips parted from a metal workpiece by the cutting edge to reduce friction and workpiece metal buildup on or adjacent the cutting edge. The undercut configuration reduces manufacturing costs of the tool bit which otherwise would require additional finishing operations to obtain the same reduction of friction at the cutting edge area.

Abstract: A portable tool for use in axially cutting and squaring ends of tubes includes a main tool body within which is rotatably mounted a tool shaft having a cutting tool attached at one end thereof, a tube receiving and clamping unit for retaining an end portion of a tube to be worked upon, a mechanism for shifting the tool shaft relative to the main tool body so that the cutting tool can progressively engage the end portion of the tube and a power drive unit for rotating the tool shaft. The tube receiving and clamping unit is provided with a plurality of circumferentially spaced ports which provides viewing access to a cutting zone, enables adjustments to or changing of the cutting tool and permits chips cut from the tube to be readily removed from within the tool. The shifting mechanism includes a camming arrangement that ensures smooth shifting of the tool shaft and which is designed to minimize the ingress of foreign matter into the tool.

Abstract: A roller cutter module for use with a rotatable tool carrier head of a lathe machine tool includes multiple opposed cutter wheels for transversely cutting tubular workpieces, and wherein the wheels are rotatably mounted upon support arms that are pivotally attached to a support plate that is attached to the tool carrier head. An actuating system carried by the support plate pivots the support arms so as to cause the cutter wheels to be fed radially inwardly to sever a workpiece. The actuating system includes a linkage assembly which cooperates with the support plate to enable equalization of the cutting forces applied by the opposed cutter wheels to an out-of-round workpiece. The cutter wheels are mounted on the support arms so as to biased against spring elements in an axial direction to track a cutting centerline axially away from the support plate.

Abstract: A portable single point facing tool (10) includes a drive system (12,18), a rotating base member (14), a feed control mechanism (40) and a tilting cutting head (32) with a cutting tool (30). The tool feed is driven through a gear system (84,86) synchronously with rotation of the base member, a variable throw crank mechanism (82) and a drive rod (83) so that tool feed rate is infinitely variable relative to speed of rotation of the base member. Direction of tool feed can selectively be set at forward, reverse or zero feed by means of a selectively engageable gear train associated with the feed mechanism (40).

Abstract: A mandrel assembly for a portable lathe is disclosed having a clamping system which will accommodate a wide variety of pipe sizes. Jaw blocks are removably attached to the mandrel attaching block to increase or decrease the clamping size of the mandrel. A mandrel mounting head is readily removable from a mandrel shaft so as to provide further variation in clamping size or function. All of the clamp actuating mechanism, as well as the tool feed mechanism is contained within the interior of the mandrel shaft to prevent contamination from external sources, but is readily accessible from the exterior of the mandrel shaft. Laterally spaced apart bearing surfaces between the mandrel attaching blocks and the mandrel mounting head, as well as a torque ring insert interposed between the mandrel shaft and a mandrel adapter provide for the torque reaction between the cutting tool and the mandrel so as to provide a rigid, sturdy base for the cutting tool.

Abstract: The invention relates to a drill jig assembly for use in the removing a tube from a wall structure. the device fits within the tube and defines drill guide grooves along its length such that, a rotating drill inserted into the guide grooves will cut away a portion of the wall thickness of the tube. When portions of the tubing wall thickness have been reduced, the tube may be readily inwardly collapsed so as to easily remove it from the wall structure.