Lincoln Electric AC-225C - Manual (Page 64)

Semiautomatic Wire Feeders
www.lincolnelectric.com/wire-feeders
LF-74
4-Roll Heavy Duty Industrial Feeder
LN ™ -7 GMA
Semiautomatic, Constant Speed Wire Feeder
Product Product Input Output Capacity Wire Feed Speed Range Wire Size Range H x W x D Net Weight
Name Number Power Current /Duty Cycle ipm (m/min) in (mm) in. (mm) lbs.(kg)
LF-74 K2426-1 24-42 VAC 600 Amps @ 60% 100-800 Solid: .023-1/16 (0.6-1.6) 11.1 x 10.2 x 12.9 46
Base Model 50/60 Hz 500 Amps @ 100% (2.5-20.3) Cored: .030-5/64 (0.8-2.0) (282 x 259 x 328) (20)
LF-74 Bench Model, K2426-2 9 Amps 15.3 x 13.0 x 27.7 71
Heavy Duty (389 x 330 x 704) (32)
LF-74 Bench Model, K2426-3 50-400 Solid: .023-1/16 (0.6-1.6) 71
Heavy Duty Extra Torque (1.3-10.1) Cored: .030-3/32 (0.8-2.4) (32)
Product Product Input Output Capacity Wire Feed Speed Range Wire Size Range H x W x D Net Weight
Name Number Power Current /Duty Cycle ipm (m/min) in (mm) in. (mm) lbs.(kg)
LN ™ -7 GMA K440-2 115 VAC 600A/60% 75-700 Solid: .023-1/16 (0.6-1.6) 10.9 x 9.8 x 9.6 26
(2 Roll) 50/60 Hz (1.9-17.8) Cored: .045-5/64 (1.2-2.0) (277 x 249 x 244) (10.9)
2.5 Amps
Designed for MIG and cored wire welding in job shop and manufacturing environments,
the rugged LF-74 wire feeders are built to deliver reliable performance day
after day. Select the LF-74 for large diameter wires, longer gun cables or
long boom conduit or hard automation applications.
• Patented MAXTRAC ® heavy-duty cast aluminum wire
drive system provides reliable feeding and durability.
• Brass-to-brass gun connections for better electrical
conductivity that results in better arc performance.
• Totally tool-less drive rolls and wire guide
installation. Four gear-driven wire drive rolls
slide on and off easily!
• Calibrated wire feed speed dial for precise
and accurate settings.
• In addition to great mild steel performance,
these feeders deliver positive arc
starting and feeding with stainless
steel, aluminum and flux-cored wires!
• Control cable connector with a Spin-Nut ™
makes connecting the control cable a
simple twist-of-the-wrist.
• Three-year warranty on parts and labor.
Shown:
LF-74 Bench Model,
Heavy Duty, Extra Torque
The LN ™ -7 GMA is a semiautomatic constant speed wire feeder that can be used with a variety
of Lincoln engine drives, DC or CV power sources in a shop or field environment.
• 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.
• Completely enclosed case protects the heavy duty
wire drive mechanism from damage, but allows easy
access to drive rolls.
• Dynamic braking system stops wire feed motor
quickly to minimize crater sticking problems.
• Three-year warranty on parts and labor.
Processes
• MIG
• Pulsed
• Flux-Cored
Output Input
Base Model Includes
• Control Cable, 15 ft. (4.5 m)
• .035/.045" Drive Rolls and Guide
Required Options
• Weld Power Cable
Key Options
• K2330-1 Postflow and Burnback
Timer Kit
• K2329-1 Remote Voltage Control
Kit
• K1546-1 Incoming Bushing for
Lincoln ® Conduit
• K162-1 Spindle Adapter For
Readi-Reels and Spools
• More options at end of section
Literature
E8.11
Processes
• MIG
• Flux-Cored
Output Input
Required Options
• Heavy Duty Wire Reel Stand
• Drive Roll Kit
• Control Cable
• Terminal Strip Adapter Cable
• Control Extension Cable
• Work and Feeder Cables Package
• Weld Power Cable
Key Options
•
More options at end of section
Literature
E8.10
66
115
VAC
60
50
Hz
24-42
VAC