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MIG Flux-Cored Submerged Arc
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LN-7 and LN-7 GMA
Semiautomatic, Constant Speed Wire Feeders
The LN-7 and LN-7 GMA are semiautomatic constant speed wire feeders that can be
used with a variety of Lincoln engine drives, DC or CV power sources in a shop or field
environment. Both models and a Ready-Pak™ package feature Lincoln's unique drive roll
design, which provides positive feeding, quick reloading and durability for long life.
Controlled wire feed speed during starting provides clean, positive starts and minimizes
stubbing, skipping and spatter. For dependable operation and precise wire feeding in a
rugged package, choose the LN-7 or LN-7 GMA.
Publication E8.10 11/03
www.lincolnelectric.com
Processes
Advantage Lincoln
Required Options
Order
TECHNICAL SPECIFICATIONS
Recommended General Options
• The LN-7 feeds up to 3/32” (2.4mm) solid and 7/64” (2.8mm)
flux-cored wires, from 50-500 inches per minute (1.3-12.7m/min)
wire feed speed.
• The LN-7 GMA feeds up to 1/16” (1.6mm) solid and 5/64”
(2.0mm) flux-cored wires, from 75-700 inches per minute
(1.9-17.8 m/min) wire feed speed.
• Unique drive roll design provides positive feeding and quick
reloading by simply starting wire into guide tube. The drive
rolls and guide tubes are designed for long life and precise
wire feeding.
• Four-roll wire drive system available for additional wire feed-
ing force and easier feeding of soft wires (LN-7 GMA model
only).
• Completely enclosed case protects the heavy duty wire drive
mechanism from damage, but allows easy access to drive
rolls.
• Control circuit features “cold electrode” when the gun trigger
is released for an added measure of safety.
• Low voltage (24 volts) gun trigger circuit.
• Dynamic braking system stops wire feed motor quickly to
minimize crater sticking problems.
• Three-year warranty on parts and labor.
Recommended Power Source Options
SEMIAUTOMATIC WIRE FEEDERS
115
VAC
Gun and Cable Assembly, Drive Roll Kit, Control Cable, Weld Power
Cable
K521 LN-7 Wire Feeder (2 Roll)
K440-2 LN-7 GMA (2 Roll) with gas solenoid valve
K567-2 LN-7 GMA (4 Roll) with gas solenoid valve
K1801-1 LN-7 GMA (2 Roll) Ready-Pak™ Wire Feeder
Universal Wire Reel Stand, Insulated Lift Bail, Caster Kit, Swivel
Platform, Spindle Adapter, Readi-Reel Adapter, Coil Adapter, Plastic
Wire Cover, Digital Voltmeter, Water Solenoid Kit, Gas Solenoid
Assembly, Gas Guard Regulator, GMA Timer Kit, Burnback Kit,
Magnetic Flux Screen Separator, Flux Screen, Continuous Flux
Feeding Tank Assembly, Undercarriage, Remote Output Control
Kit, Remote Control Adapter
CV-250, CV-300, CV400-I, CV-400, CV500-I, CV-655, V350-PRO,
DC-400, DC-600, DC-655, DC-1000
Wire Feed Wire Size Dimensions Net
Product Product Input Rated Output Speed Range Range H x W x D Weight
Name Number Power Current / Duty Cycle ipm (m/min) in. (mm) in. (mm) lbs. (kg)
Solid Cored
LN-7 K521 115 VAC 600 Amps @ 60% 50-500 .023-3/32 .045-7/64 10.9 x 9.8 x 9.6 24
(2 Roll) 50/60 Hz (1.3-12.7) (0.6-2.4) (1.2-2.8) (277 x 249 x 244) (10.9)
2.5 Amps
LN-7 GMA K440-2 75-700 .023-1/16 .045-5/64 10.9 x 9.8 x 9.6 26
(2 Roll) (1.9-17.8) (0.6-1.6) (1.2-2.0) (277 x 249 x 244) (10.9)
LN-7 GMA K567-2 75-700 .023-1/16 .045-5/64 11.1 x 11.6 x 9.7 32
(4 Roll) (1.9-17.8) (0.6-1.6) (1.2-2.0) (282 x 295 x 246) (13.8)
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LN-7 model only.
Shown with options