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Description
Output Input
Submerged Arc
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.
Publication E9.70 12/03
www.lincolnelectric.com
Processes
Advantage Lincoln
Order
TECHNICAL SPECIFICATIONS
Recommended General Options
• 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.
Recommended Power Sources
AUTOMATIC WIRE FEEDERS
115
VAC
K227-1 LT-7 Standard Model
K395-1 LT-7 Track Model
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
Required Options
Control Cable, Weld Power Cable, Contact Nozzle Assembly
CV-655, DC-600, DC-655, DC-1000, DC-1500
Wire Feed Wire Size Range Dimensions Net
Product Product Input Rated Output Speed Range Solid H x W x D Weight
Name Number Power Current/Duty Cycle ipm (m/min) in. (mm) in. (mm) lbs. (kg)
LT-7 K227-1 115 VAC 600A/100% 100 - 400 3/32 - 3/16” 27.5 x 33 x 14 120
Standard 50/60 Hz 1100A/100% (with (2.5 - 10.2) (2.4 - 4.8) (698 x 838 x 356) (54)
LT-7 K395-1
water cooling)
130
Track (59)
Track Model Shown