K395-1 - LT-7 Submerged Arc Track Tractor Wire Feeder

Lincoln Electric LT-7 Tractor (Track Model) - K395-1

The Lincoln Electric LT-7 Tractor (Track Model) is a premier solution for mechanized submerged arc welding, engineered to deliver high-efficiency performance in heavy industrial environments. Designed as a self-propelled wire feeder, this unit integrates seamlessly with standard track systems to provide precise, automated welding for long seams and heavy weldments. The K395-1 model is built to handle the rigors of shipyards, bridge construction sites, and storage tank erection fields, offering a robust yet lightweight chassis that can be easily transported between joints.

At the core of the LT-7 is a sophisticated solid-state control system that ensures reliability and repeatability. The controls automatically compensate for variations in input voltage and tractor load, maintaining constant wire feed speeds between 100 and 400 inches per minute and travel speeds from 6 to 70 inches per minute. This level of regulation is critical for achieving code-quality welds in structural steel and heavy plate fabrication. The unit supports solid wire diameters ranging from 3/32 inch to 3/16 inch, making it versatile enough for thick plate welding as well as lighter gauge applications down to 2.5mm.

Operational flexibility is a key advantage of the LT-7. The tractor features a vertical head lift adjuster that allows operators to fine-tune electrical stick-out from 1/2 inch to 5 inches, optimizing the arc characteristics for different joint configurations. The welding head can be angled up to 50 degrees from vertical and adjusted for a drag angle of up to 30 degrees, accommodating complex joint geometries including butt and fillet welds. The control box is conveniently mounted directly on the tractor, eliminating the need for the operator to return to the power source to adjust parameters, thereby increasing arc-on time and overall productivity.

This unit is compatible with a wide range of Lincoln Electric DC constant voltage and constant current power sources. Its compact footprint allows it to pass through openings as small as 14 inches, making it an ideal choice for confined space work in barge and tank construction. Backed by Lincoln Electric's three-year warranty on parts and labor, the LT-7 Tractor represents a durable investment in automated welding capability.