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82 Benning Street, West Lebanon, NH 03784 USA
(603) 298-5711 • www.thermal-dynamics.com
Manual 0-4759
SL55 Plasma Cutting
Hand Torch
Use with Lincoln
Installation and Operation Instructions
®
Pro-Cut® 55
General Information
Pro-Cut® 55
Torch Models
Cutting Capacity 60 Amps
Torch Leads Lengths
Applications
Power Supply
Used With:
Plasma Gas
Secondary Gas
Operating Pressure
Max. Input Pressure 125 psi / 8.6 bar
Gas Flow (Cutting
and Gouging)
Duty Cycle
Ambient
Temperature
Maximum Current 60 Amps
Voltage (Vpeak) 500V
Arc Striking Voltage 7kV
Current Rating
Cooling
Catalog No. 7-5255
Catalog No. 7-5256
25' / 7.6 m
50' / 15.2 m
Shielded Drag Cutting
Standoff Cutting
Lincoln® Pro-Cut 55
Compressed Air (Only)
70 - 75 psi
4.8 - 5.2 bar
250 scfh
(110 lpm)
100% @ 60 Amps
@ 250 scfh
104° F
40° C
Up to 60 Amps, DC,
Straight Polarity
Combination of Ambient
Air and Gas Stream
Through Torch
Refer to the Complete Assembly Replacement page for
configurations and catalog numbers.
These instructions are important for the proper installation
of the Torch. Read the instructions thoroughly before
attempting the installation. Keep these instructions for
reference.
Supplied Parts
The Replacement Torches include:
• Torch With Leads - 1 each
• Installation Instructions - 1 each
• Consumables (Installed on the Torch):
Art # A-04743
Electrode
The consumable parts installed in the Torch may
not necessarily be optimized for your Power Supply
or cutting application. For best results, refer to the
selection charts in this manual to choose the proper
consumables for your application.
The start cartridge supplied with this torch cannot
be used with any other 1Torch or on any other power
supply except Lincoln Pro-Cut 55.
Start Cartridge
Tip
NOTE
CAUTION
Shield Cup
Options
The following torch options are available. Refer to the
* Lincoln and Pro-Cut are registered trademarks of Lincoln
Electric.
©
2005 by Thermal Dynamics Corp., Printed in USA.
Manual 0-4759 1 January 10, 2006
complete assembly replacement list for catalog numbers.
• Cutting Guide Kits
• Leather Leads Covers
• Standoff Cutting Guide
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Torch Specifications
A. Torch Configuration and Dimensions
Turn the connector locking ring to secure the connector to
the receptacle. Do not use the locking ring to pull the
connector into the receptacle.
The torch head is at 75° to the torch handle. The torch
includes a torch handle and torch trigger assembly.
9.5" (241 mm)
3.75"
(95 mm)
1.17" (29 mm)
Art # A-03322
B. Operating Notes
WARNING
This torch is not to be used with oxygen (O2).
NOTE
Operating pressure varies with torch model,
operating amperage, and torch leads length. Refer
to gas pressure settings chart for each model.
C. Direct Contact Hazard
For exposed tip the recommended standoff is 1/8" - 1/4"
(3 - 6.4 mm).
Spare Parts Label
Included with the torch is an adhesive label. Apply the
label to the power supply, where the operator can see it for
easy reference.
Torch Parts Selection
Refer to the Consumables Selection Chart for the various
torch parts for the application and operation.
WARNINGS
Disconnect primary power to the system before
disassembling the torch or torch leads.
DO NOT touch any internal torch parts while the
AC indicator light of the Power Supply is ON.
The shield cup (or shield cup body and shield cap or
deflector) holds the tip and start cartridge in place. Position
the torch with the shield cup facing upward to keep these
parts from falling out when the cup is removed.
Change the torch parts as follows:
1. Unscrew and remove the shield cup from the torch
head.
D. Parts-In-Place (PIP) Circuit - 12 vdc
The torch and leads include circuitry called Parts-InPlace (PIP). This circuit includes a switch on the torch
head. The shield cup closes this switch when properly
installed. The torch will not operate if this switch is
open.
To Control
Torch Switch
Cable Wiring
PIP Switch
A-04791
Torch Trigger
Shield Cup
Torch Head
Electrode
Start Cartridge
Tip
Shield Cup
Connecting Torch
Torch leads connect directly to the power supply receptacle.
Align the leads connector with the power supply
receptacle. Press the connector into the receptacle fully.
2. Tilt the torch head to remove the tip and start cartridge.
January 10, 2006 2 Manual 0-4759
A-03645
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3. Fit the desired start cartridge and tip onto the electrode.
CAUTION
2. Adjust current output on the Power Supply to match
the selected tip and attach the work clamp firmly to the
work.
The start cartridge supplied with this torch cannot
be used with any other 1Torch or on any other power
supply except Pro-Cut 55.
NOTE
Refer to the consumables selection chart for the proper
combination of torch parts, including shield cups
and tips.
4. Hand tighten the shield cup until it is seated on the
torch head. Do not use tools to tighten the cup. If
resistance is felt when installing the cup, check the
threads before proceeding.
NOTE
When operating the torch in a normal condition, a
small amount of gas vents through the gap between
the shield cup and the torch handle. Do not attempt
to overtighten the shield cup as irreparable damage
to internal components may result.
Operating Gas Pressure
Set gas pressure at the power supply regulator according
to the following charts. These charts are a guide only;
adjust as necessary for best performance.
CAUTION
Do not operate the torch with the torch tip in contact
with the work at output currents greater than
40amps. Drag cutting at higher currents can cause
irreparable damage to the torch parts.
3. Hold the torch away from your body.
4. Slide the trigger release toward the back of the torch
while simultaneously squeezing the trigger. The pilot
arc will start.
Trigger
Trigger Release
A-02986
5. Bring the torch within transfer distance to the work. The
main arc will transfer to the work, and the pilot arc will
shut off.
Ga s P re ssure Se tti n g s
Leads Length
Tip
60A 70 ps i / 4.8 bar 75 psi / 5.2 bar
25' / 7.6 m 50' / 15.2 m
Cutting
The torch can be held comfortably in one hand or steadied
with two hands. Choose the holding technique that feels
most comfortable and allows good control and movement.
Sequence of Operation
1. Turn on power and adjust gas pressure on the Power
Supply pressure gauge. Refer to the charts for optimum
pressure settings for the combination of torch tip and
total lead lengths in use.
NOTE
The gas preflow and postflow are a characteristic of
the power supply and not a function of the torch.
Trigger
1
2
Trigger Release
3
4
Art # A-03383
Manual 0-4759 3 January 10, 2006