Lincoln Electric LF-72 User Manual
Page 2
LF-72/LF-74 Wire Feeders
[2]
A CLOSER LOOK
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PERFORMANCE
LF-74 Four Roll Drive
A
B
C
D
E
F
G
F
A
B
Rigid Cast Aluminum Frame
• Enhances precise drive roll
alignment
Brass to Brass Interchangeable
Gun Bushings
• More reliable electrical
conductivity – no oxide
build-up
• More efficient energy transfer –
lower voltage drops
• Easily adapt any number
of Lincoln Magnum or
competitive guns
New Patent-Pending Drive Rolls
• For steel - new design delivers
20% more feeding force
• For aluminum - chrome plated
to resist build-up
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
Patent-Pending Dual Spring
Pressure Arm
• Easy turn numeric tension
indicator
• Set heavy tension for steel
and stainless
• Set moderate tension for cored
wires
• Set soft tension for aluminum
• Wide idler arm hinge delivers
improved drive roll clamping
pressure
Separate Drive Gear
• Reduces pressure on motor for
extended service life
LF-72 Two Roll Drive
C
D
E
F
G