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CUTTING CAPABILITY
The Pro-Cut 55 is rated at 55 amps, at 50% duty cycle
on a 10 minute basis or 40 amps, at 100% duty cycle.
If the duty cycle is exceeded, a thermal protector will
shut off the output of the machine until it cools to the
normal operating temperature.
Figure B.1 shows the cut capacity of the Pro-Cut 55
when cutting mild steel. The graph plots cut thickness
vs. torch travel speed with a torch standoff of 0.15 in.
(3.8mm).
Example: 0.25 material
Amps
Speed (IPM)
35 38
45 57
55 62
FIGURE B.1 – LINCOLN’S PRO-CUT 55 MILD STEEL CUT CAPACITY CHART
CONSUMABLE LIFE
The expected life for the Pro-Cut 55's electrode under
normal operating conditions is approximately 320
starts/cuts. An erosion of .060 in. (1.5mm) is typical for
end of electrode life. However, the electrode may last
longer. A green and erratic arc will indicate definite
electrode failure, and the electrode should be
replaced immediately.
It is recommended that consumables be replaced in
complete sets. (Example: Electrode and Nozzle). This
will maximize the performance of the Pro-Cut 55 sys-
tem.
LIMITATIONS
Do not exceed output current and duty cycle rating of
machine. Do not use the Pro-Cut 55 for pipe thawing.
OPERATION
B-4 B-4
PRO-CUT 55
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Recommended Torch Travel Speed (IPM)
80% of Maximum Speed
100
80
60
40
20
0
0.000 0.125 0.250
0.375 0.500 0.625 0.750
Material Thickness
25 A
35 A
45 A
55 A