SEMIAUTOMATIC WIRE FEEDERS

LN-25 Wire Feeder

Portable, Construction Wire Feeder
The LN-25 semiautomatic wire feeder is ideal for field or construction use. Since it is
powered across the arc, no control cables are needed! Simply connect the weld cable,
attach the arc sensing clip, and you’re ready to go. This portable MIG and flux-cored wire
feeder comes in a fully enclosed case to protect against damage on the job site. The
LN-25 features a tool-less quick release mechanism for easy wire changing, and it
accepts 10-44 lbs. (4.5-19.9 kg) wire packages for plenty of welding versatility.

Processes Description

MIG Flux-Cored Output

Advantage Lincoln Base Unit Includes

• For MIG and flux-cored arc welding processes using up to Arc Sensing Lead & Clip,15 ft. (4.5m), Weld Power Cable, 20" (508mm)
44 lb. (19.9 kg) spools.
• Designed for .023-1/16" (0.6-1.6mm) solid, .035-5/64" Required Options
(0.9-2.0mm) cored and .035-1/16" (0.9-1.6mm) aluminum wire Gun and Cable Assembly, Drive Roll Kit, Weld Power Cable, Cable
sizes. Lug, Twist-Mate Cable Plug
• Selectable dial for setting low range, 50-350 ipm (1.3-8.9m/min)
wire feed speed or high range, 50-700 ipm (1.3-17.8m/min) wire
feed speed. Recommended General Options
• Includes DC voltmeter, voltmeter polarity switch and 15 ft. Jumper Plug Kit, Remote Voltage and Output Control Kits, Gas
(4.6m) arc sensing lead and clip and 20" (508mm) weld power Solenoid Kit, Internal Contactor Kit, Gas Flow Timer Kit, 30 lb.
cable. Adapter, Spindle Adapter
• For use with Magnum® flux-cored and MIG guns.
• Automatic overvoltage and motor overload shutdown Recommended Power Source Options
protection.
All Lincoln Engine Driven or Electric Welders with CV Capability
• Double-latched case features an insulated gun holder and easy
access to wire.
• Entire unit is compact and portable and will pass through a
16" (400mm) diameter manway.
Order
• Manufactured under a quality system certified to ISO 9001 K428 LN-25 Wire Feeder
requirements. K449 LN-25 Wire Feeder with Internal Contactor
and Gas Solenoid
• Three-year warranty on parts and labor.

TECHNICAL SPECIFICATIONS

Wire Feed Wire Size Range Dimensions Net

Product Product Input Rated Output Speed Range in. (mm) HxWxD Weight
Name Number Power Current / Duty Cycle ipm (m/min.) Solid Aluminum Cored in. (mm) lbs. (kg)

K428 15-40V DC Up to 500A / 60% 28

LN-25 (110V DC 50 - 700 .023 - 1/16" .035 - 1/16" .035 - 5/64" 14 x 7.4 x 21 (12.7)
Across-The-Arc Max. OCV) (1.2 - 17.7) .(0.6 - 1.6) (0.9 - 1.6) (0.9 - 2.0) (356 x 188 x 533)
K449 Up to 300A / 60% 35
(15.4)

Publication E8.100 11/03

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 A CLOSER LOOK

PERFORMANCE
• 2-roll wire drive system for easy wire feeding. • Dynamic braking system stops wire feed motor quickly to
• The LN-25 provides constant wire feed speed for use with minimize crater sticking problems.
constant voltage (CV) power sources, and arc sensing wire (1) Most semiautomatic wire welding processes perform better using CV power sources.
feed speed for use with constant current (CC) power sources(1). Be sure the proper power source is used for your application. Contactor life may be
shortened in applications using CC power sources with high OCV.

FEATURES
• Tool-less quick release wire drive tension system and gun cable
connections for easy wire or gun changes.
• Optional gas solenoid, timer kit for preflow and postflow of gas,
internal contactor, and remote voltage control kits are available. 12
• Standard Voltmeter

11
Key Controls
10
1. Optional Remote Voltage Control
1
2. Optional Gas Timer Flow Kit
3. Voltmeter Polarity Switch
4. Trigger Connection 9
5. Arc Sensing Lead and Clip
6. Skid Plate
7. Riveted Door and Hinge Assembly 2
8. Gun and Cable Connection
9. Voltmeter 8
10. Molded Case Door 3
11. Case Latches
12. Fold Down Carrying Handle
7
4

QUALITY AND RELIABILITY

• Fully enclosed molded case meets UL94-VO flammability • Three-year warranty on parts and labor.
resistance and is heat, spatter, and impact resistant. • Manufactured under a quality system certified to ISO 9001
• Automatic overvoltage and motor overload shutdown protection. requirements.
• CSA approved.

LN-25 Wire Feeder

[2] www.lincolnelectric.com
 SYSTEM SELECTION

ACROSS THE ARC SET-UP (with Electrode Cold Operation)

Electrode cold operation is available with K449 or K428 (with optional K443-2 Internal Contactor Kit installed).
(Connections are for current equipment design. Subject to change without notice.)

Output Terminals
Always Hot.

CC Power Source,
LN-25 Wire Feeder
RangerTM 10,000,
K449 or K428 (with K443-2)
Ranger 3 Phase,
SAE 400 with CV Adapter
Magnum gun and
cable assembly
Weld Power Cable

Output Terminals
Always Hot.
Ranger 250, Ranger 250 LPG,
Ranger 305G, Ranger 305D,
Commander® 300, Power source contactor LN-25 Wire Feeder
Vantage® 500, switch must be in the K449 or K428 (with K443-2)
Air Vantage® 500, “ON” position.
Engine Driven Welders
with Wire Feed Module Magnum gun and
(local/remote switch in local position)
Weld Power Cable cable assembly

Output Terminals
Always Hot.

CV-250,
CV-300, LN-25 Wire Feeder
14 Pin Order K484 Jumper
CV-400, K449 or K428 (with K443-2)
Plug Kit.
CV400-I,
CV500-I
Magnum gun and
Weld Power Cable cable assembly

Output Terminals
Always Hot.
CV-655,
DC-400,
DC-600, Power source contactor LN-25 Wire Feeder
14 Pin K449 or K428 (with K443-2)
DC-655, switch must be in the
V350-PRO “ON” position or use
K484 Jumper Plug Kit.
Magnum gun and
Weld Power Cable cable assembly

LN-25 Wire Feeder

[3] www.lincolnelectric.com
 SYSTEM SELECTION

ACROSS THE ARC SET-UP (with Electrode Cold Operation and Remote Voltage Control at LN-25)
Electrode cold operation is available with K449 or K428 (with optional K443-2 Internal Contactor Kit installed).
(Connections are for current equipment design. Subject to change without notice.)

K444-1 Remote
RangerTM 250, Voltage Control Kit
Ranger 250 LPG,
Ranger 305G,
Ranger 305D, 6 Pin LN-25 Wire Feeder
Commander® 300, K449 or K428 (with K443-2)
Vantage® 500,
Air Vantage® 500

Power Source Contactor Switch must Magnum gun and

be in the “ON” position. cable assembly
Weld Power Cable

Output Terminals Always Hot.

Ranger 250, Ranger 250 LPG, K444-2 Remote Voltage Control Kit
Ranger 305G, K444-2 has built-in jumper to keep contactor in
Ranger 305D, 14 Pin power source closed all the time.
Commander 300,
Vantage 500,
Air Vantage 500, LN-25 Wire Feeder
CV-250, CV-300, K449 or K428 (with K443-2)
CV-400, CV-655,
DC-400, DC-600 (Above
Code 10500), CV400-I, Magnum gun and
CV500-I, V350-PRO, cable assembly
Engine Driven Welders Weld Power Cable
with Wire Feed Module
(local/remote switch in remote position)

Output Terminals Always Hot.

LN-25 Wire Feeder

[4] www.lincolnelectric.com
 SYSTEM SELECTION

ACROSS THE ARC SET-UP (with Electrode Cold Operation and Remote Voltage Control at LN-25)
For LN-25 K428 Model without Internal Contactor.
(Connections are for current equipment design. Subject to change without notice.)

42 Volt Remote Output Control Systems

CV-250, CV-300, K1819-10 Wire Feeder

CV400-I, CV500-I, Control Cable
CV-655, V350-PRO, K624-1
DC-400, DC-600, Remote Output
DC-655, Ranger 250, 14 Pin
Control Module
Ranger 250 LPG,
Ranger 305G, LN-25 Wire Feeder
Ranger 305D, K428 model only
Commander 300,
Magnum gun and
Vantage 500, cable assembly
Weld Power Cable
Air Vantage 500

Control Cable and Extensions

K1819-10 Wire Feeder Control Cable, 10 ft. (3.0m)
K1797-25 14-pin Extension Control Cable, 25 ft. (7.6m)
K1797-50 14-pin Extension Control Cable, 50 ft. (15.2m)

WELD POWER CABLE SET-UP

CV-250,
CV-300,
CV400-I,
CV500-I, LN-25 Wire Feeder
V350-PRO K428 model only
Weld Power Cable

Magnum gun and

cable assembly

Twist-Mate Cable Plug

Weld Power Cables Twist-Mate Cable Plugs
K1841-25 Twist-Mate to Twist-Mate, 1/0, 350A, 60% duty cycle, 25 ft. (7.6m) K852-70 for 1/0-2/0 cable
K1841-50 Twist-Mate to Twist-Mate, 2/0, 350A, 60% duty cycle, 50 ft. (15.2m) K852-95 for 2/0-3/0 cable

CV-400, CV-655,
DC-400, DC-600,
DC-655, Ranger 250,
Ranger 250 LPG,
Ranger 305G, LN-25 Wire Feeder
Ranger 305D, Weld Power Cable K428 model only
Commander 300,
Vantage 500, Magnum gun and
Air Vantage 500 cable assembly
Engine Driven Welders
w/Wire Feed Module
Cable Lug
Weld Power Cables Cable Lug
K1842-10 Lug to Lug, 3/0, 600A, 60% duty cycle, 10 ft. (3.0m) S1119-14 for 1/0-2/0 cable
K1842-35 Lug to Lug, 3/0, 600A, 60% duty cycle, 35 ft. (10.6m)
K1842-60 Lug to Lug, 3/0, 600A, 60% duty cycle, 60 ft. (18.2m)
K1842-110 Lug to Lug, 4/0, 600A, 60% duty cycle, 110 ft. (33.5m)

LN-25 Wire Feeder

[5] www.lincolnelectric.com
RECOMMENDED OPTIONS

REQUIRED OPTIONS REQUIRED OPTIONS, CON'T

Magnum Gas-Shielded Gun and Twist-Mate Cable Plug
Cable Assemblies For connecting welding cable to
Available 200-550 amps, air-cooled, output terminal receptacles. For
Magnum 400 shown
gas-shielded welding guns. 1/0 – 2/0 (50 – 70 mm2) cable.
See publication E12.10 Order K852-70

Magnum Self-Shielded Gun and Twist-Mate Cable Plug

Cable Assemblies For connecting welding cable to
Available 250-600 amps. output terminal receptacles. For
K126 Innershield Gun See publication E12.110 2/0 – 3/0 (70 – 95 mm2) cable.
shown
Order K852-95

Cable Lug
For #1 1/0-2/0 cable.
DRIVE ROLL AND GUIDE TUBE KITS
Order S1119-14

Wire Type Order

and Sizes Number GENERAL OPTIONS
Solid Wire: Jumper Plug Kit
.023 - .025" (0.6 mm) KP653-025S For use with CV only power sources
.030" (0.8 mm) KP653-030S with 14 pin MS-type wire feeder
.035" (0.9 mm) KP653-035S connections and no contactor con-
.045 - .052" (1.2 - 1.4 mm) KP653-052S trol switch. Jumper plug kit closes
Cored Wire: contactor for always hot welding
.035" (0.9 mm) KP653-035C output.
.045 - .052" (1.2 - 1.4 mm) KP653-052C Order K484
Solid or Cored Wire:
.052 - 1/16" (1.3 - 1.6 mm) KP653-1/16
.068 - 5/64" (1.7 - 2.0 mm) KP653-3/32 Terminal Strip Remote Voltage
Control Kit
Aluminum Wire: Provides 25 ft. (7.6m) of remote
.035" (0.9 mm) KP654-035A output voltage control with power
3/64" (1.2 mm) KP654-3/64A sources having a terminal strip.
1/16” (1.6 mm) KP654-1/16A
Order K444
Aluminum Wire (Clutched Drive Roll):
.035" (0.9 mm) KP1682-035A
1.0 mm KP1682-1.0A 6 Pin Remote Voltage Control Kit
3/64" (1.2 mm) KP1682-3/64A Provides 25 ft. (7.6m) of remote
1/16” (1.6 mm) KP1682-1/16A
voltage control when used with
power sources having a 6 pin
MS-type connector.
Order K444-1
WELD POWER CABLES

14 Pin Remote Voltage Control Kit

4 5 6
Provides 25 ft. (7.6m) of remote
Order No. Description
output voltage control and output
jumper (2 and 4) for power sources
K1841-25 Twist-Mate to Twist-Mate, 1/0, 350A, 60% duty cycle, 25 ft. (7.6m)
having a 14 pin MS-type connector.
K1841-50 Twist-Mate to Twist-Mate, 2/0, 350A, 60% duty cycle, 50 ft. (15.2m)
K1842-10 Lug to Lug, 3/0, 600A, 60% duty cycle, 10 ft. (3.0m) Order K444-2
K1842-35 Lug to Lug, 3/0, 600A, 60% duty cycle, 35 ft. (10.6m)
K1842-60 Lug to Lug, 3/0, 600A, 60% duty cycle, 60 ft. (18.2m)
K1842-110 Lug to Lug, 4/0, 600A, 60% duty cycle, 110 ft. (33.5m) 42 Volt Remote Output Control
Module
Provides remote voltage control and
power source output control.
Requires 42 volt auxiliary power.
Mounts inside LN-25 control box.
Requires K1819-10 Wire Feeder
Control Cable.
Order K624-1

LN-25 Wire Feeder

[6] www.lincolnelectric.com
RECOMMENDED OPTIONS

Wire Feeder Control Cable Gas Flow Timer Kit

10 ft. (3.0m) power source to wire For use with Gas Solenoid Kit.
feeder cable. Male 9 pin to female Provides adjustable delays for pre-
14 pin. flow and postflow of shielding gas.
Order K1819-10 Order K434-1

Wire Feeder Control Cable 22-30 lb. Readi-Reel Adapter

Extension Adapts 22-30 lb. (10-14kg) Lincoln
Male 14 pin to female 14 pin. Readi-Reels® of electrode to 2"
(Requires K1819-10.) (51mm) spindle. Wire not included.
Order K1797-25 for 25 ft. Order K363P
Order K1797-50 for 50 ft.

14 lb. Innershield Coil Adapter

Gas Solenoid Kit Permits 14 lb. (6 kg) Innershield®
Includes solenoid valve and mount- electrode coils to be mounted on
ing bracket. For K428 LN-25 model 2" (51mm) O.D. spindles. Wire not
only. (Standard on K449 LN-25 included.
model.) Order K435
Order K430-2

8” O.D. Spool Adapter

Internal Contactor Kit For small spools. Permits 8"
Provides cold electrode until gun (203mm) O.D. spools to be mounted
trigger is pressed and cold inch on 2" (51mm) O.D. spindles.
switch for loading wire. For K428 Order K468
LN-25 model only. (Standard on
K449 LN-25 model.)
Order K443-2

LN-25 Wire Feeder

[7] www.lincolnelectric.com
 LN-25 ORDER FORM

PRODUCT DESCRIPTION ORDER NUMBER QUANTITY PRICE

LN-25 Wire Feeder K428

LN-25 Wire Feeder w/Internal Contactor and Gas Solenoid K449

Required Options
Magnum Gas-Shielded Gun and Cable Assemblies See publication E12.10
Magnum Self-Shielded Gun and Cable Assemblies See publication E12.110
Drive Roll and Guide Tube Kits See page 6
Weld Power Cables See page 6
Twist-Mate Cable Plug:
– for 1/0-2/0 cable K852-70
– for 2/0-3/0 cable K852-95
Cable Lug S1119-14

Recommended General Options

Jumper Plug Kit K484
Terminal Strip Remote Voltage Control Kit K444
6-Pin Remote Voltage Control Kit K444-1
14-Pin Remote Voltage Control Kit K444-2
42 Volt Remote Output Control Module K624-1
Wire Feeder Control Cable K1819-10
Wire Feeder Control Cable Extension:
25 ft.(7.6m), 50 ft.(15.2m) K1797-25, -50
Gas Solenoid Kit (standard on K449) K430-2
Internal Contactor Kit (standard on K449) K443-2
Gas Flow Timer Kit (K428 Requires K430-2) K434-1
22-30 lb. Readi-Reel Adapter K363P
14 lb. Innershield Coil Adapter K435
8” O.D. Spool Adapter K468

TOTAL:

C U S T O M E R A S S I S TA N C E P O L I C Y

The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed
their expectations. On occasion, purchasers may ask Lincoln Electric for advice or information about their use of our products. We respond to our customers based on the best information in our possession at that
time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or advice. We expressly disclaim any warranty of any kind, including any warranty
of fitness for any customer’s particular purpose, with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or correcting any such informa-
tion or advice once it has been given, nor does the provision of information or advice create, expand or alter any warranty with respect to the sale of our products.

Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables
beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements.

Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.

T H E L I N C O L N E L E C T R I C C O M PA N Y
22801 St. Clair Ave., Cleveland, OH 44117-1199 • 216.481.8100 • www.lincolnelectric.com