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Lincoln Electric LF-72 Technical Specifications

2-roll or 4-roll heavy duty industrial wire feeders.
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LF-72 and LF-74 Wire Feeders
2-Roll or 4-Roll Heavy Duty Industrial Feeders
Designed for MIG and cored wire welding in job shop and manufacturing
environments, the rugged LF-72 and LF-74 wire feeders are built to
deliver reliable performance day after day. The heart of these feeders
is the highly engineered 2-roll or 4-roll MAXTRAC™ wire drive
system, delivering strong and consistent feeding force for tough
applications.
Select the 2-roll LF-72 for most .035-.045 wire applications.
Select the 4-roll LF-74 for large diameter wires, longer
gun cables or long boom conduit or hard automation
applications.
Processes
MIG, Pulsed, Flux-Cored
Advantage Lincoln
• 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. Two or four
gear-driven wire drive rolls slide on and off easily!
• Calibrated wire feed speed dial for precise and accurate settings.
• Rugged, industrial-grade wire feeder motor.
Product
(1)
Name
LF-72 Base Model
(with gun)
LF-72 Base Model,
(no gun, no cable)
LF-72 Bench Model,
Standard Duty
LF-72 Bench Model,
Heavy Duty
LF-74 Base Model
LF-74 Bench Model,
Heavy Duty
LF-74 Bench Model,
Heavy Duty, Extra Torque
(1)
See selection guide on page 4.
LF-74 Bench Model, Heavy Duty, Extra Torque, K2426-3
LF-72 Bench Model, Standard Duty, K2327-2
TECHNICAL SPECIFICATIONS
Product
Input
Output Capacity
Number
Power
Current / Duty Cycle
K2327-1
24-42 VAC
500 Amps @ 60%
50/60 Hz
400 Amps@ 100%
9 Amps
K2327-4
K2327-2
K2327-3
K2426-1
600 Amps @ 60%
500 Amps@ 100%
K2426-2
K2426-3
(Shown with optional wire.)
• 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.
• Totally enclosed wire drive.
• Manufactured under a quality system certified ISO 9001
requirements and ISO 14001 environmental standards.
• Three-year warranty on parts and labor.
Wire Feed
Wire Size
Speed Range
Range
ipm (m/min)
in (mm)
50-800
Solid
(1.3-20.3)
.023-1/16
(0.6-1.6)
100-800
(2.5-20.3)
50-400
(1.3-10.1)
SEMIAUTOMATIC WIRE FEEDERS
Dimensions
H x W x D
in (mm)
Cored
11.1 x 10.2 x 12.9
.030-5/64
(282 x 259 x 328)
(0.8-2.0)
12.6 x 10.9 x 22.5
(320 x 277x 572)
15.3 x 13.0 x 27.7
(389 x 330 x 704)
.030-5/64
11.1 x 10.2 x 12.9
(0.8-2.0)
(282 x 259 x 328)
15.3 x 13.0 x 27.7
(389 x 330 x 704)
.030-3/32
(0.8-2.4)
Publication E8.11 8/06
www.lincolnelectric.com
Output
or
Input
24-42
VAC
50
60
Hz
Net
Weight
lbs (kg)
44
(20)
27
(12)
53
(24)
68
(31)
46
(21)
71
(32)
71
(32)

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   Summary of Contents for Lincoln Electric LF-72

  • Page 1

    2-Roll or 4-Roll Heavy Duty Industrial Feeders Designed for MIG and cored wire welding in job shop and manufacturing environments, the rugged LF-72 and LF-74 wire feeders are built to deliver reliable performance day after day. The heart of these feeders is the highly engineered 2-roll or 4-roll MAXTRAC™...

  • Page 2

    • Full support for wire throughout the drive path • Removable outer wire guide for easy access • No tools required • No birdnesting LF-72 Two Roll Drive Patent-Pending Dual Spring Pressure Arm • Easy turn numeric tension indicator • Set heavy tension for steel and stainless •...

  • Page 3

    F ) 2-Step/Trigger Interlock Switch G ) Burnback/Postflow Timer Kit (optional) H ) Remote Voltage Control Kit (optional) LF-72 shown with optional K2330-1 Postflow and Burnback Timer Kit and K2329-1 Remote Voltage Control Kit. LF-74 Four Roll Bench Model Shown...

  • Page 4

    • Drive Roll and no gun, no cable Wire Guide Kit For boom mounting or for use with bulk consumables. LF-72 Base Model (no gun, no cable) Unit Includes: BASE MODEL • Drive Roll and Wire Guide Kit For boom mounting •...

  • Page 5

    K1797-10 - 10 ft KP1505-035S K1797-25 - 25 ft. KP1505-045S K1797-50 - 50 ft. KP1505-052S K1797-100 - 100 ft. – – Standard with all LF-72 (except K2327-4) and LF-74 models. KP1505-1/16S KP1505-035C WELD POWER CABLE REQUIRED KP1505-045C KP1505-052C KP1505-1/16C Order No. KP1505-068...

  • Page 6

    An 18" x 18" (457 x 457mm) footprint ties up very little floor space. Order K1778-1 LF-72/LF-74 Wire Feeders www.lincolnelectric.com...

  • Page 7

    Lincoln electrode to 2" (51mm) spindle. Order K1504-1 Plastic Wire Cover Kit Plastic enclosure for up to 60 lb. (27.2 kg) wire packages. Order K1634-2 NOTE: Miller Electric® is not a trademark of The Lincoln Electric Company. LF-72/LF-74 Wire Feeders www.lincolnelectric.com...

  • Page 8

    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.

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Lf-74

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