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OPERATION

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LN-25 PRO EXTREME

DEFINITION OF WELDING TERMS

WFS
• Wire Feed Speed
CC
• Constant Current
CV
• Constant Voltage
GMAW
• Gas Metal Arc welding
SMAW
• Shielded Metal Arc welding
FCAW
• Flux Core Arc Welding
GENERAL DESCRIPTION
General Physical Description
The LN25 PRO EXTREME is specially engineered to
be the most rugged portable wire feeder available.
The plastic case is molded from a high impact, flame
retardant plastic for durability and low weight. The
patent pending design keeps the internal components
protected and dry.
The heart of the LN25 PRO EXTREME is the 2 roll
MAXTRAC™ drive. The patented features on the wire
drive offer tool-less changing of the drive rolls and
wire guides for quick spool changes. A tachometer
controlled motor powers the patent pending drive rolls
for smooth, steady feeding without slippage.
With only one p.c. board, the LN25 PRO EXTREME is
designed to be simple, reliable and easy to service.
The p.c. board is mounted with Lincolnʼs leading envi-
ronmental design protection by mounting the board in
a plastic tray and potting it with epoxy.
General Functional Description
The LN25 PRO EXTREME as designed is a simple,
robust feeder. Standard features include a calibrated
wire feed speed dial, CV-CC switch, Gas Purge and
Cold Feed.

RECOMMENDED PROCESSES

• GMAW
• FCAW

PROCESS LIMITATIONS

• GMAW-P procedures must be qualified by the cus-
tomer.
• Across-the-Arc models are not recommended for
stitch or spot welding.

EQUIPMENT LIMITATIONS

• The duty cycle of the wire feeder is 325A, 100% and
450A, 60%. Duty cycle is based upon the amount of
welding performed in a 10 minute period.
• The maximum spool size is 45 lb, 12" diameter.
• Maximum FCAW gun length is 15 ft.
• Maximum GMAW gun length is 25 ft.
• Push-pull guns do not work with the wire feeder.

RECOMMENDED POWER SOURCES

• CV-305
• CV-400
• CV-655
• DC-400
• DC-600
• DC-655
• Invertec V-350 PRO
• Invertec V-450 PRO
• Multi-Weld 350
• Ranger 10,000
• Ranger 3 Phase
• Ranger GXT
• Ranger 250
• Ranger 305
• SAE-400
• Pipeliner 200G
• Classic 300
• Vantage 300
• Vantage 400
• Vantage 500