Bernard S-Gun Steel Monocoil Air-Cooled MIG Gun

Air-cooled MIG gun with a steel monocoil cable for long runs

The Bernard S-Gun is a semi-automatic, air-cooled MIG gun with a steel monocoil inner tube. Bernard says the monocoil gives extra structural integrity and pinch resistance, which helps keep gas flow and wire feeding reliable on longer cables that are looped or pulled around corners. The sheet lists the S250, S350 and S450 models, cable lengths of 15, 20 and 25 ft, and applications that include commercial truck and trailer, heavy equipment, general manufacturing and fabrication, pipeline, rail and ship.

Technical specifications

Why the monocoil cable matters

A conventional liner can kink when a gun cable is pulled tight around a corner or dragged across a floor, and a kinked liner interrupts the wire feed. The steel monocoil construction is meant for long-cable work, which the sheet ties to applications such as rail and ship, where the welder may be far from the feeder. The sheet specifically calls it ideal for longer cables that are frequently looped or stretched around corners to the point of pinching. Wire feedability is the point of the design, together with reliable shielding gas flow through the cable.

Selecting the S-Gun configuration

Choose the cable length first, since the 25 ft option reaches furthest from the feeder, then the handle: the small curved O series suits tight access and the straight T series suits a conventional grip. Choose a fixed neck for repeatable access or a rotatable neck when the angle changes during the job. Keep wire diameter within 0.030 to 5/64 in. Note that the model names S250, S350 and S450 sit alongside the rated outputs of 250, 300 and 400 A on the sheet, so confirm the exact model with Bernard when ordering a specific rating.

Bernard also states that the configurable mix of neck, handle and trigger options with AccuLock S consumables simplifies maintenance and inventory costs. The aluminium armoured neck is described as withstanding abuse while giving outstanding heat dissipation, which matters on a gun rated at 60 % duty with mixed gases.

For replacement work, Bernard points to an online gun configurator and a replacement parts list for the S-Gun. Quote the existing model, cable length, handle and neck type in the enquiry so that the liner and consumables can be confirmed before supply, and state the wire diameter in use.

Documents and quotation

A copy of the Bernard S-Gun spec sheet is attached. For a quotation, send the model, cable length, handle and neck style, wire type and diameter, and the feeder connection. See TIG torches and MIG guns for related products.