Lincoln Submerged Arc Welding Tractor - LT-3 Model - Complete w/ Control Box

1962 Lincoln-Weld LT-3 Submerged Arc Tractor

Code: 4751 | Year: 1962 | Type: Tractor Wire Feeder

Overview

The LT-3 is a vintage industrial workhorse designed for the most grueling submerged arc welding tasks. Manufactured in 1962, this machine was built during a time when "heavy duty" truly meant heavy—utilizing robust copper windings and hardened steel drive rolls. It is primarily used for long, continuous horizontal welds on heavy plate, such as those found in tank farms, shipyards, and bridge construction.

Key Features

• Self-Propelled Design: The tractor moves along the joint at a consistent speed, ensuring uniform weld penetration and bead appearance.
• High-Amperage Compatibility: Designed to be paired with high-output DC power sources (typically 600A to 1000A+) to handle massive wire diameters for deep-penetration welding.
• Adjustable Head: The welding head can be tilted or rotated to accommodate different joint geometries, providing versatility for various fabrication needs.
• Manual Control Interface: Features analog dials for voltage and travel speed, which many veteran operators prefer for their "feel" and immediate feedback compared to digital menus.

Technical Specifications

• Year of Manufacture: 1962
• Wire Sizes: Typically handles 3/32" to 3/16" wire diameters.
• Propulsion: Variable-speed DC motor for precise travel control.
• Material Capacity: Suited for heavy structural steel and thick-wall pressure vessels.