Chicago Electric 91124 Assembly Instruction
®
MIG-100 WELDERMIG-100 WELDER
MIG-100 WELDER
MIG-100 WELDERMIG-100 WELDER
WITH THERMAL OVERLOADWITH THERMAL OVERLOAD
WITH THERMAL OVERLOAD
WITH THERMAL OVERLOADWITH THERMAL OVERLOAD
91124
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
Copyright© 2004 by Harbor F reight Tools®. All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or
form without the express written consent of Harbor Freight Tools.
For technical questions and replacement parts, please call 1-800-444-3353.
REVISED 12/04
Specifications
ITEM DESCRIPTION
Welding Current 90 AMPs
Duty Cycle 10%@90AMPs
Power Consumption 110VAC, 23 amps
Heat Control Switch on Unit This model is not adjustable
Ground Cable 4 AWG, single insulation, 6 foot
Torch Power Cable 8 AWG, single insulation, 6 foot
Po wer Cord 3-core, double insulated, 14 AWG, U.L. approved
Power Cord Plug UL Approved
Thermal Overload
Welder Tip 0.030”; Spare: Welder Tip 0.035 inch;
Wire Size 0.030 inch flux core wire when using 0.030” Welder Tip
Wire Spool Size 4 inches diameter
Overall Dimensions 14-1/2 (L) x 8-1/2 (W) x 15-1/2 (H) inches
Weight 34.45 lbs.
Accessories Spare Welder Tip
Both settings: 10 min. shutdown, 3 min. back on with Light
Will also accept 0.023” welder tip
Welding F ace Shield
Wire Brush / Hammer combination
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lighted. Do not use electrically
powered tools in the presence of flammable gases or liquids.
3. Keep children awa y. Children must ne v er be allow ed in the work area. Do not let them
handle machines, tools, or extension cords.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and k eep out of reach of children.
5. Do not force tool. It will do the job better and more safely at the rate for which it was
intended. Do not use inappropriate attachments in an attempt to e xceed the tool capacity .
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REV 06/04
6. Use the right tool for the job. Do not attempt to force a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool was
designed. Do not modify this tool and do not use this tool for a purpose for which it was
not intended.
7. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Protective, electrically nonconductive clothes and nonskid footwear are
recommended when working. Wear restrictive hair covering to contain long hair.
8. Use eye and ear protection. Always wear ANSI approved, arc shaded, impact safety
face shield. Always use the full face shield (provided) when arc welding. Wear an ANSI
approved dust mask or respirator when working around metal, chemical dusts, fumes
and mists.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.
10. Maintain tools with care. Keep tools sharp and clean for better and saf er performance.
Follow instructions f or lubricating and changing accessories. Inspect tool cords periodically
and, if damaged, have them repaired b y an authorized technician. The handles must be
kept clean, dry, and free from oil and grease at all times.
11. Disconnect power. Unplug tool when not in use.
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are
removed from the tool or machine work surface before plugging it in.
13. Avoid unintentional starting. Be sure the s witch is in the Off position when not in use
and before plugging in. Do not carry any tool with y our finger on the trigger , whether it is
plugged in or not.
14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
15. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check f or alignment and binding of moving parts; an y broken parts or
mounting fixtures; and any other condition that may affect proper operation. Any par t
that is damaged should be properly repaired or replaced by a qualified technician. Do
not use the tool if any switch does not turn On and Off properly.
16. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
17. Replacement parts and accessories. When servicing, use only identical replacement
parts. Use of any other parts will void the warranty. Only use accessories intended for
use with this tool. Approved accessories are available from Harbor Freight Tools.
18. Do not operate tool if under the influence of alcohol or drugs. Read warning labels
on prescriptions to determine if your judgment or reflexes are impaired while taking
drugs. If there is any doubt, do not operate the tool.
19. Maintenance. F or y our saf ety, service and maintenance should be performed regularly
by a qualified technician.
Page 3SKU 91124
20. Use proper size and type extension cord. If an e xtension cord is required, it must be of
the proper size and type to supply the correct current to the tool without heating up.
Otherwise, the extension cord could melt and catch fire, or cause electrical damage to
the tool. This tool requires use of an extension cord of 20 amps minimum capability (up
to 30 feet), with wire size rated at 12 AWG. Longer extension cords require larger size
wire. If you are using the tool outdoors, use an extension cord rated for outdoor use
(signified by “WA” on the jacket).
Note: Performance of this tool may vary depending on variations in local line voltage. Extension cord usage may also affect tool performance.
Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be
built into this product, but must be supplied by the operator .
Arc W elding Safety W arnings and Precautions
Warning: This product, when used for welding and similar applications, produces chemicals known to the State of California to cause cancer and birth defects (or other reproductive harm). California Health & Safety Code 25249.5, et seq.
1. Avoid electrical shock. Do not permit electrically live par ts, cables, or electrodes to
contact skin, clothing, or gloves. Protective clothing should be hole-free, dry, and ANSI
approved.
This unit draws enough current to cause serious injury or death. Bef ore turning the welder
on, check the electrode holder to be sure that there are no protruding screw heads, and
that all insulation is secure. Do not weld unless you are insulated from ground and the
work piece.
2. Avoid breathing fumes or gases. They can cause serious health problems. Use an
active ventilation system directly above the welding area. Keep your head out of the
fumes.
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REV 05/04
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