WIRE FEEDERS: LF-72 and LF-74 Wire Feeders

SEMIAUTOMATIC WIRE FEEDERS
LF-72 and LF-74 Wire Feeders
Processes
MIG, Pulsed MIG, Flux-Cored
Product Number
LF-72
LF-74
See page 6 for specs on all models
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.
Input Power
24-42 VAC 50/60 Hz 9 Amps
Rated Output
LF-72 500 Amps @ 60% Duty Cycle
LF-74 600 Amps @ 60% Duty Cycle
Wire Size Range
Solid: .023-1/16 in. (0.6-1.6 mm)
Cored: .030-5/64 in. (0.8-2.0 mm)
Weight/Dimensions (H x W x D)
(See page 6)
Wire Feed Speed Range ipm (m/min)
50-800 (1.3-20.3)
APPLICATIONS
Heavy Equipment
Fabrication
Job Shop
FEATURES
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 geardriven wire drive rolls slide on and off
easily!
Calibrated wire feed speed dial for
precise and accurate settings.
CV-305, CV-400-I, CV-400, CV-500-I,
CV-655, Invertec® V350-PRO,
Invertec® V450-PRO, DC-400, DC-600,
DC-655
(requires K2335-1 competitive adapter)
Deltaweld(1), Dimension(1), XMT(1) and
CP302(1)
(1)
Trademarks of the Miller Electric Manufacturing Company
ISO
9001:2000
14001:2004
THE LINCOLN ELECTRIC COMPANY
Publication E8.11 | Issue Date 8/09
© Lincoln Global, Inc. All Rights Reserved.
22801 St. Clair Avenue • Cleveland, OH U.S.A. • 44117-1199
PH: +1.216-481-8100 • www.lincolnelectric.com
OUTPUT
INPUT
IN
CO
LN ELECT
RI
C
RECOMMENDED COMPETITIVE (1)
POWER SOURCES
WHAT’S INCLUDED
All LF-72 and LF-74 Units Include:
.035-.045 in. (0.9-1.2 mm) drive roll
and wire guide kit.
Select Units Include (see page 6):
10 ft. (3.0 m) control cable with
14-pin female connector.
15 ft. (4.5 m) Magnum® PRO 350 gun
and cable assembly with
.035-.045 in. (0.9 mm-1.2 mm) liner.
Standard-Duty wire reel stand.
Heavy-Duty wire reel stand.
L
RECOMMENDED LINCOLN ELECTRIC
POWER SOURCES
Shown with options:
See page 4 for all models
Two Year Extended
Warranty Available.
KEY CONTROLS
1. Calibrated Wire Feed Speed Dial
2. Gun Connection (K1500-2)
3. 5-Pin Gun Connection
8.
1.
(optional)
4. Motor Thermal Protection Light
5. Cold Feed/Gas Purge Switch
6. 2-Step/Trigger Interlock Switch
7. Burnback/Postflow Timer Kit (optional)
7.
2.
(optional)
8. Remote Voltage Control Kit (optional)
6.
5.
4.
3.
FEATURES
Front View
Convenient spare parts
reference chart.
Quick release
spoolholder
Heavy duty hinged door opens upward to
provide generous access to wire drive.
Convenient storage tray on top for
contact tips and drive rolls.
Heavy Duty Wire Reel
stand allows spool sizes
up to 60 lbs.
Rugged MAXTRAC® wire drive system.
Welding cable
strain relief
LF-74 Four Roll Bench Model Shown
Back View
All models except K2327-4
Back View
LF-72 (K2327-4)
Gas hose connection inlet.
Control cable connector with
Spin-Nut™ for fast, easy, toolless connection.
Patented ball bearing inlet
guide for accurate feeding.
[ 2 ] | LF-72 and LF-74
PERFORMANCE
®
Patented Dual Spring Pressure Arm
• Easy turn numeric tension indicator
• Set heavy tension for solid steel and stainless steel wire
• Set moderate tension for cored wires
• Set soft tension for aluminum wire
Rigid Cast Aluminum Frame
• Wide idler arm hinge delivers improved drive roll
clamping pressure
• Enhances precise drive roll
alignment
Twist-Lock Drive Roll Hubs
• Two or four gear driven rolls
• Fast, tool-less changeovers
Patented Split Wire Guides
• Full support for wire
throughout the drive path
• Removable outer wire
guide for easy access
• No tools required
• No birdnesting
Brass to Brass Interchangeable
Gun Bushings
LF-74 Four Roll Drive
• More reliable electrical
conductivity – no oxide
build-up
• More efficient energy transfer –
lower voltage drops
• Easily adapt any number
of Lincoln Magnum®,
Magnum® PRO or
competitive guns
LF-72 Two Roll Drive
New Patented Drive Rolls
• For steel - new design delivers
20% more feeding force
Separate Drive Gear
• For aluminum - chrome plated
to resist build-up
• Reduces pressure on
motor for extended
service life
LF-72 and LF-74 | [ 3 ]
OPTIONS
DRIVE ROLL & WIRE GUIDE KITS
LF-72 Two-Roll
Description
CONTROL EXTENSION CABLES
LF-74 Four-Roll
Cable Type
Solid Wire Sizes (includes stainless steel):
.023-.030 in. (0.6-0.8 mm)
.035 in. (0.9 mm)
.040 in. (1.0 mm)
.045 in. (1.2 mm)
.052 in. (1.4 mm)
.035, .045 in. (0.9, 1.2 mm)
1/16 in. (1.6 mm)
.030-.035 in. (0.8-0.9 mm)
.045 in. (1.2 mm)
052 in. (1.4 mm)
1/16 in. (1.6 mm)
.068-.072 in. (1.8 mm)
5/64 in. (2.0 mm)
3/32 in. (2.4 mm)
.035 in. (0.9 mm)
.040 in. (1.0 mm)
3/64 in. (1.2 mm)
1/16 in. (1.6 mm)
KP1696-030S
KP1696-035S
KP1696-2
KP1696-045S
KP1696-052S
KP1696-1(1)
KP1696-1/16S
Cored Wire Sizes:
KP1697-035C
KP1697-045C
KP1697-052C
KP1697-1/16C
Solid or Cored Wire Sizes:
KP1697-068
KP1697-5/64
–
Aluminum Wire Sizes:
KP1695-035A
KP1695-040A
KP1695-3/64A
KP1695-1/16A
Description
Wire Feeder Control Extension Cables
KP1505-030S
KP1505-035S
KP1505-040S
K1797-10 - 10 ft. (3 m)(1)
K1797-25 - 25 ft. (7.6 m)
Male 14-pin to female 14-pin
K1797-50 - 50 ft. 15 m)
KP1505-045S
KP1505-052S
–
KP1505-1/16S
K1797-100 - 100 ft. (30 m)
(1)
KP1505-035C
KP1505-045C
KP1505-052C
KP1505-1/16C
Standard with all LF-72 (except K2327-4) and LF-74 models.
WELD CABLE REQUIRED
WELD CABLES
KP1505-068
KP1505-5/64
KP1505-3/32
KP1507-035A
KP1507-040A
KP1507-3/64A
KP1507-1/16A
Order No.
Description
K1840-10
Twist-Mate™ to Lug, 1/0, 350A, 60% duty cycle, 10 ft.
K1842-10
Lug to Lug, 3/0, 600A, 60% duty cycle, 10 ft. (3.1 m)
K1842-35
Lug to Lug, 3/0, 600A, 60% duty cycle, 35 ft. (10.7 m)
K1842-60
Lug to Lug, 3/0, 600A, 60% duty cycle, 60 ft. (18.3 m)
K1842-110
Lug to Lug, 4/0, 600A, 60% duty cycle, 110 ft. (33.5 m)
(1) Standard on LF-72.
FEED PLATE GUN RECEIVER BUSHINGS
K1500-1 Gun
Receiver Bushing
(Optional)
Magnum® PRO 250, 350
and 450 or
Magnum® 200, 300 and 400
gun and cable assemblies
with K466-1 connector kit.
Magnum® Self-shielded
Innershield® gun
and cable assembly.
Magnum® PRO 550 or
Magnum® 550 gun and cable
assembly with K613-1
connector kit.
K1500-2 Gun
Receiver Bushing
(Standard)
K1500-3 Gun
Receiver Bushing
(Optional)
K1500-4 Gun
Receiver Bushing
(Optional)
K1500-5 Gun
Receiver Bushing
(Optional)
K489-7 Fast-Mate™
Gun Receiver
Bushing (Optional)
Magnum® PRO 350
Gun Package with 035-045 liner
and K466-10 connector kit
(K2652-2-10-45)
Magnum® PRO 550 or
Magnum® 550 gun and cable
assembly with K613-7
connection.
Magnum® PRO 250, 350
and 450 or
Magnum® 200, 300 and 400
gun and cable assemblies
with K466-3 connector kit.
To adapt to OXO® guns.
Magnum® gun and
cable assemblies
with Fast-Mate connections.
Magnum® PRO 450
Gun Package with 035-045 liner
and K466-10 connector kit
(K2653-2-10-45)
Guns with Tweco®
#5 connectors.
Magnum® 200 and 400 fully
assembled guns
(K497-2x and K471-2x).
Magnum® PRO 250, 350
and 450 or
Magnum® 200, 300 and 400 gun
and cable assemblies with
K466-10 connector kit.
Guns with Tweco® #2, #3, and #4
connectors.
[ 4 ] | LF-72 and LF-74
Handles both
single and dual
procedure guns.
RECOMMENDED ACCESSORIES TO EXPAND MACHINE CAPABILITIES
GENERAL OPTIONS
Magnum® PRO Gun and Cable
Assemblies
250-550 amps, air-cooled,
gas-shielded welding guns.
See publication E12.01
Magnum® Self-Shielded
Innershield® Gun and Cable
Assemblies
Available 200-550 amps, air-cooled,
gas-shielded welding guns.
See publication E12.10
Magnum® Self-Shielded
Innershield® Gun and Cable
Assemblies
Available 250-600 amps.
See publication E12.110
Postflow and Burnback
Timer Kit
Provides adjustable delay of power
source output shut off to prevent
electrode sticking in crater when
using high wire feed speeds.
Order K2330-1
Remote Voltage Control Kit
Allows arc voltage to be changed at
the feeder.
Order K2329-1
Incoming Bushing for Lincoln
Conduit
Feed Plate Incoming Bushings
connect directly to wire conduit (not
included), for use in boom system,
long distances, or large payoff
packages. Bushings can be used
with any wire conduit (K515 or
K565).
Order K1546-1 for .025-1/16 in.
(0.6 - 1.6 mm) wire
Order K1546-2 for 1/16-1/8 in.
(1.6 - 3.2 mm) wire
Spindle Adapter
for Readi-Reels® and Spools
For fixture and other custom
installations. Features 2 in. (51 mm)
O.D. spindle for mounting
Readi-Reels® and 2 in. (51 mm) I.D.
spools up to 60 lb. (27.2 kg)
capacity.
Order K162-1
Deluxe Adjustable Gas Regulator
& Hose Kit
Accommodates CO2, Argon, or
Argon-blend gas cylinders. Includes
a cylinder pressure gauge, dual scale
flow gauge and 4.3 ft. (1.3 m) gas
hose.
Order K586-1
Harris® Argon Flowmeter/
Regulator and Hose Kit
Order 3100211
Adapter for Competitive Power
Sources
Allows wire feeder to connect to
select Miller Electric® power
sources.
Order K2335-1
Control Cable to Terminal Strip
Adapter
Connects 14-pin control cable to
power sources with terminal strip.
Order K1798
115V/42V Transformer Kit
Provides a way to use the wire
feeder on power sources that have
115V AC available on the
terminal strip.
Order K1520-1
Wire Reel Cover Kit
Plastic enclosure for up to 44 lb.
(20 kg) wire packages.
Order K1634-1
ADDITIONAL OPTIONS FOR
FEEDERS EQUIPPED WITH HEAVY
DUTY WIRE REEL STAND
Insulated Lift Bail
Allows the entire wire feeder to be
hung from a crane or hook. Use with
Heavy Duty Wire Reel Stand.
Order K1555-1
Caster Kit — Light Duty
Mounts to the Heavy Duty Wire Reel
Stand. Allows for easy movement of
wire feeder.
Order K1556-1
Welding Fume Extractors
Lincoln offers a wide variety of
welding fume extraction
environmental system solutions,
ranging from portable systems easily
wheeled around the shop to shopwide central systems servicing many
dedicated welding stations.
Request Publication E13.40
Undercarriage
Includes mounting frame, front
casters, rear wheels and handle for
hand towing. For use with Wire Reel
Stands.
Order K163
ADDITIONAL OPTIONS FOR BASE
MODEL (DOES NOT INCLUDE WIRE
REEL STAND)
50-60 lb. Coil Adapter
Adapts 50-60 lb. (22.6-27.2 kg) coils
of Lincoln wire to 2 in. (51 mm)
spindle.
Order K1504-1
Standard Duty Wire Reel Stand
For use with Lincoln 10-44 lb.
(4.5-20 kg) wire packages that use
a 2 in. (51 mm) spindle.
Order K2328-1
Heavy Duty Wire Reel Stand
For use with Lincoln 10-60 lb.
(4.5-27.2 kg) wire packages that use
a 2 in. (51 mm) spindle. Hole in
stand fits over lift bail.
Order K1524-3
ADDITIONAL OPTIONS FOR
FEEDERS EQUIPPED WITH
STANDARD DUTY WIRE REEL
STAND
Swivel Platform
Mounts to the lift bail on the power
source and bottom of the Heavy
Duty Wire Reel stand. Wire feeder
may be lifted off if needed.
Compatible with Light Duty Caster
Kit. Includes “lazy susan” parts tray.
Order K1557-1
14 lb. Innershield® Coil Adapter
Permits 14 lb. (6 kg) Innershield®
electrode coils to be mounted on
2 in. (51 mm) O.D. spindles.
Order K435
8" O.D. Spool Adapter
Permits 8 in. (200 mm) O.D. spools
to be mounted on 2 in. (51 mm) O.D.
spindles.
Order K468
LF-72 and LF-74 | [ 5 ]
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.
WIRE FEEDER SELECTION GUIDE
LF-72 Base Model
(no gun, no control cable)
(K2327-4)
LF-72
Number of Rolls:
LF-72 Bench Model,
Standard Duty (K2327-5)
LF-72 Bench Model, Heavy
Duty (K2327-6)
Shown with optional wire.
Shown with optional wire.
LF-72 Bench Model,
Heavy Duty (no gun)
(K2327-7)
Shown with optional wire.
Inches Per Minute (m/min):
50-800 (1.3-20.3)
Wire Size:
in. (mm)
Solid .023-1/16 (0.6-1.6)
Cored .030-5/64 (0.8-2.0)
LF-74
Number of Rolls:
For boom mounting
or for use with bulk
consumables.
For most welding needs that
require a rugged
and dependable wire
feed system.
For applications
requiring up to 60 lb. wire
packages.
For applications
requiring up to 60 lb. wire
packages.
Unit Includes:
• Drive Roll and Wire
Guide Kit .035-.045
Unit Includes:
• Drive Roll and Wire Guide Kit
.035-.045
• Magnum® PRO 350 Gun and
Cable Assembly
• Control Cable 10' (3 m)
Unit Includes:
• Drive Roll and Wire Guide Kit
.035-.045
• Magnum® PRO 350 Gun and
Cable Assembly
• Control Cable 10' (3 m)
Unit Includes:
• Drive Roll and Wire Guide Kit
.035-.045
• Control Cable 10' (3 m)
LF-74 Base Model
(no gun)
(K2426-4)
LF-74 Bench Model,
Heavy Duty (no gun)
(K2426-5)
Shown with optional wire.
Inches Per Minute (m/min):
50-800 (1.3-20.3)
Wire Size:
in. (mm)
Solid .023-1/16 (0.6-1.6)
Cored .030-5/64 (0.8-2.0)
For boom mounting
or for use with
bulk consumables.
For applications
requiring up to 60 lb. wire
packages.
Unit Includes:
• Drive Roll and Wire
Guide Kit
• Control Cable 10' (3 m)
Unit Includes:
• Drive Roll and Wire Guide Kit
• Control Cable 10' (3 m)
• Heavy Duty Wire Reel Stand
PRODUCT SPECIFICATIONS
Product
Name
Product
Number
Input
Power
Output Capacity
Current / Duty Cycle
LF-72 Base Model
(w/o gun or cable)
LF-72 Bench Model
Standard Duty
LF-72 Bench Model
Heavy Duty
LF-72 Bench Model
Heavy Duty (w/o gun)
LF-74 Base Model
K2327-4
24-42 VAC
50/60 Hz
9 Amps
500 Amps @ 60%
LF-74 Bench Model
Heavy Duty
K2327-5
Wire Size
Range
In. (mm)
Wire Feed
Speed Range
ipm (m/min.)
50-800
(1.3-20.3)
Solid
.023-1/16
(0.6-1.6)
Cored
.030-5/64
(0.8-2.0)
K2327-6
K2327-7
K2426-4
600 Amps @ 60%
K2426-5
HxWxD
inches (mm)
Net
Weight
lbs. (kg)
11.1 x 10.2 x 12.9
(282 x 259 x 328)
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)
15.3 x 13.0 x 27.7
(389 x 330 x 704)
11.1 x 10.2 x 12.9
(282 x 259 x 328)
15.3 x 13.0 x 27.7
(389 x 330 x 704)
24
(11)
52
(24)
69
(31)
63
(29)
27
(12)
63
(29)
For best welding results with Lincoln Electric equipment,
always use Lincoln Electric consumables. Visit www.lincolnelectric.com for more details.
CUSTOMER ASSISTANCE POLICY
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 information or advice about their use of our products. Our employees respond to inquiries to the best of their ability based on information provided to them by the customers and the knowledge
they may have concerning the application. Our employees, however, are not in a position to verify the information provided or to evaluate the engineering requirements for the particular weldment. Accordingly, Lincoln Electric does not warrant
or guarantee or assume any liability with respect to such information or advice. Moreover, the provision of such information or advice does not create, expand, or alter any warranty on our products. Any express or implied warranty that might
arise from the information or advice, including any implied warranty of merchantability or any warranty of fitness for any customers’ particular purpose is specifically disclaimed.
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.