Disclosed is a handle clamp for an exothermic mold. The clamp includes a pair of legs, each having a plurality of rods that are shaped to fit into engagement holes on sections of the mold. The rods of each leg engage with one section of the mold. Engagement brackets are rotatably disposed on one or more or the rods. The brackets each have a thumb bolt that can be extended toward a mold section connected with the clamp. When engaged with the mold section, the thumb bolt stabilizes the mold section on the handle. A detent mechanism is provided between the bracket and the leg of the handle. The detent mechanism releaseably holds the bracket in one of a selected plurality of rotational positions with respect to the rod. By selecting different rotational positions for the brackets, the handle can be configured to engage with different configurations of mold. The thumb bolts that are biased toward the mold section by a spring. The bolts include a key that can be aligned or misaligned with a key slot on the bracket. By aligning the key with the key with the key slot, the bolt can be moved toward or away from the mold section under the biasing force of the spring. By misaligning the key and key slot, the bolt can be locked into engagement with the mold section or else held in a disengaged position.

A plasma arc cutting guide. The guide includes a tube. The tube is an elongated hollow body. The tube includes a first end opposite a second end. A plurality of magnetic spheres are disposed within the tube. A plurality of non-magnetic spheres are disposed within the tube in between the plurality of magnetic spheres.

A cutting torch guide assembly for cutting beveled openings includes a first rod that is hollow. A first sleeve is positioned around and slidably positionable on the first rod. A pin is coupled to and extends perpendicularly from the first sleeve. The pin is configured to couple to a metal substrate to define an axis of a penetration that is to be cut into the metal substrate. A second rod is positioned in and selectively extensible from the first rod. The first sleeve is positionable to select a diameter of the penetration on an opposing side of the metal substrate. The second rod is positionable relative to the first rod to select a thickness of the metal substrate. A ring coupled to the second rod is configured to insert a nozzle of a cutting torch so that the nozzle is positioned to cut a beveled penetration into the substrate.

A rotatable gas metal arc welding apparatus comprising: a) a rotatable base; b) a rotation brake; c) a primary welding boom arm; d) at least one secondary welding boom arm rotatably attached to the primary welding boom arm, the at least one secondary welding boom arm being rotatable about a swivel joint so as to be rotatable in a generally horizontal plane; e) a MIG welder station; f) at least one manually operated welding gun connector, each welding gun connector being suspended from a secondary welding boom arm; g) a process controller for controlling a welding gun and the rotation brake; h) a rotatable electrical input connection for connecting electrical power from an external electrical power source to the base; i) an electrical ground connection; and j) a welding wire supply station.

A welding cart with a cable management system may include a frame, a shelf adapted to support a welding machine, a plurality of upright members, a plurality of wheels supporting the cart, one or more pairs of holders disposed on one or more sides of the cart, and a removable bar that may be releasably secured to the one or more pairs of holders. The bar may be releasably secured to the holders via a pin-and-hole mechanism and may have a hook adapted to hold welding equipment such as cables. The bar may be releasably secured to a first pair of holders disposed on a side of the cart or a second pair of holders disposed on another side of the cart. This system provides additional, easily accessible storage space for welding tools and accessories while still being compatible with a wide variety of portable welding machines.

An articulated welding boom is disclosed, the boom having two guide modules above and below the primary swivel joint. The swivel joint itself is insulated from wire used to weld to prevent unwanted arcing. A wire feeder is mounted at an end of the secondary arm. Flexible wire conduit connects the guide module and the wire feeder, and the secondary arm folds down so that the operator can load or unjam the feeder without a ladder or lift.

The Adjustable Circular Burner Attachment is a device that attaches to double-barrel burning torches to give an operator the ability to cut circles into steel or other metals. The attachment is adjustable to allow for different size circles to be cut. The attachment gives added stability for better quality cuts and a safer environment for the operator by becoming a part of the burning torch.

A hole cutting apparatus for cutting a hole in a tubular structure, which includes a center shaft, a slide mount rotatably attached to the center shaft, a slide rail slidably attached to the slide mount; a cutter attachable to the slide rail so as to move with the slide rail, and a cutter height roller attached to the cutter. The cutter height roller is structured and arranged to maintain the cutter at a distance from a cutting surface of the tubular structure as the hole is cut.

A welding system comprises a hand-held weld tool comprises a positioning and orientation measurement system having an inertial measurement unit (IMU), a processing subsystem, and a calibration apparatus. The processing subsystem is operable to compute, based on data generated by the IMU during a weld operation on a workpiece, one or more actual motion attributes for the hand-held weld tool. The calibration apparatus is configured to hold the hand-held weld tool in a known position and orientation and in stationary state for calibration of the positioning and orientation measurement system.

Hybrid manual and automated welding systems and methods are described. A hand-held welding tool is manually positioned to engage a workpiece. A weld is started from an initial position based on a first manual operator event. A welding heat source is automatically or autonomously moved along the weld relative to the workpiece from the first position to a second position relative to the workpiece during welding.