AUTOMATIC WIRE FEEDERS

LT-7 Tractor

Submerged Arc DC Wire Feeder

The LT-7 Tractor is a self-propelled mechanized wire feeder, designed for the submerged arc process with track system capabilities. It is self-guiding and easy to operate – only one operator is usually required. It is designed to be used with a variety of Lincoln DC constant voltage and constant current power sources. The rugged, lightweight unit permits quick movement to the next joint. Its compact size fits through small openings and confined spaces. Butt and fillet welds can be made on heavy plate or steel as light as 12 gauge (2.5mm). The LT-7 Tractor is ideal for the following applications: ship and barge building, storage tank erection, bridge deck installation, beam, girder or column fabrication, and long seams on heavy weldments.

Track Model Shown

Processes

Submerged Arc

Advantage Lincoln

LT-7 Tractor feeds 3/32 to 3/16” (2.4 to 4.8 mm) solid wires, from 100 - 400 inches per minute (2.5 - 10.2 m/min) wire feed speed.

Calibrated tractor drive adjusts travel speeds from 6 to 70 inches per minute (0.12 to 1.8 m/min).

Vertical head lift adjuster for adjusting electrical stickout from 1/2 in. to 5 in. (12.7 to 127.0 mm).

Weld angle is up to 50° from vertical on either side; drag angle is up to 30° from vertical.

Control box is conveniently located on the tractor (can be mounted either left or right), eliminating the need to return to the power source for routine procedure changes.

Exceptional tracking control and self-steering in most applications leave the operator free for quality control, joint cleaning and flux handling.

Welds butts, horizontal fillet and lap joints to the left or right side of the tractor frame for convenience.

Close mechanical alignment between wire and joint maximizes weld quality with no fixturing costs.

Three-year warranty on parts and labor.

Description

Output

Input 115VAC

Required Options

Control Cable, Weld Power Cable, Contact Nozzle Assembly

Recommended General Options

Wire Feeder Control Cable Extensions, Adapter Cable, Linc-Fill™ Attachments, Horizontal Fillet and Lap Adapter Kit, Flat Fillet Adapter Kit, Butt Seam Guide Kit, Track Conversion Kit, Tiny Twinarc® Adapter Kit, Track Section, Flux Screen, Magnetic Flux Screen Separator, Concentric Flux Cone Assembly

Recommended Power Sources

CV-655, DC-600, DC-655, DC-1000, DC-1500

Order

K227-1 LT-7 Standard Model

K395-1 LT-7 Track Model

TECHNICAL SPECIFICATIONS

Product

 

Product

Name

 

Number

 

 

 

 

LT-7

 

 

K227-1

Standard

 

 

 

 

 

 

 

LT-7

 

 

K395-1

Track

 

 

 

 

 

 

 

Input

Power

115VAC 50/60 Hz

Rated Output

Current/Duty Cycle

600A/100%

1100A/100% (with

water cooling)

Wire Feed

Speed Range

ipm (m/min)

100 - 400

(2.5 - 10.2)

Wire Size Range

Solid

in. (mm)

3/32 - 3/16”

(2.4 - 4.8)

Dimensions

H x W x D

in. (mm)

27.5x 33 x 14

(698 x 838 x 356)

Net

Weight

lbs. (kg)

120

(54)

130

(59)

Publication E9.70 12/03

www.lincolnelectric.com

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Lincoln Electric technical specifications LT-7 Tractor, Technical Specifications

LT-7 specifications

The Lincoln Electric LT-7 is a highly advanced and versatile semi-automated welding system designed for various industrial applications. Recognized for its reliability and integration of cutting-edge technologies, the LT-7 stands out in the field of welding equipment.

One of the main features of the LT-7 is its user-friendly interface, which allows operators to easily navigate through settings and options. The system is equipped with a digital display that provides real-time feedback during the welding process, enabling users to monitor parameters such as voltage, amperage, and wire feed speed. This level of control is crucial for achieving consistent weld quality across different materials and thicknesses.

The LT-7 utilizes Lincoln Electric's patented Power MIG technology, allowing for more efficient welding with reduced spatter and better arc stability. This technology ensures smoother operation, which translates to cleaner, more aesthetically pleasing welds. Additionally, the machine can handle a variety of welding processes, including MIG, flux-cored, and TIG welding, making it an adaptable choice for welders with diverse needs.

Another remarkable characteristic of the LT-7 is its robust construction. Designed to withstand the rigors of an industrial environment, the unit features a durable chassis and high-quality components that ensure longevity and dependability. It also comes equipped with advanced cooling systems to prevent overheating during prolonged use, further enhancing its durability.

The LT-7 is compatible with Lincoln Electric’s range of wire feeders and torches, allowing for tailored configurations based on specific project requirements. Its compact design promotes easy transport and setup, ideal for job sites where space is limited.

Safety is a priority in the design of the LT-7, with numerous protective features that safeguard operators from potential hazards. Built-in safety interlocks and thermal overload protection contribute to a safe working environment, promoting peace of mind while working on critical tasks.

In summary, the Lincoln Electric LT-7 is a sophisticated welding machine that combines advanced technologies, user-friendly features, and robust construction. Its versatility in handling various welding processes, along with its emphasis on safety and durability, makes it an excellent choice for professionals seeking reliability and performance in demanding welding applications. Whether for fabricators, maintenance, or repair work, the LT-7 represents a strong investment in quality welding technology.