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Northern Industrial Welder                                                  ARC 70 
Operating Instructions and Parts Manual 

4

-Always use this welder in the rated 
duty cycle to prevent excessive heat 
and failure. 

1.4 Specific Areas of Danger,  
       Caution or Warning

Electrical Shock 

Electric arc welders can 
produce a shock that 
can cause injury or 

death. Touching electrically live parts 
can cause fatal shocks and severe 
burns. While welding, all metal 
components connected to the 
electrode are electrically hot. Poor 
ground connections are a hazard, so 
secure the ground lead before 
welding.   
-Wear dry protective apparel: coat, 
shirt, gloves and insulated footwear. 
-Insulate yourself from the work piece. 
Avoid contacting the work piece or 
ground. 
- Do not attempt to repair or maintain 
the welder while the power is on. 
-Inspect all cables and cords for any 
exposed wire and replace 
immediately. 
-Use only recommended replacement 
cables and cords. 
-Always attach ground clamp to the 
work piece or work table as close to 
the weld area as possible. 
-Do not touch the welding electrode 
and the ground or grounded work 
piece at the same time. 
-Do not use a welder to thaw frozen 
pipes. 

Fumes and Gases 

-Fumes emitted from the 
welding process displace 
clean air and can result in 

injury or death. 

-Do not breathe in fumes emitted by 
the welding process. Make sure your 
breathing air is clean and safe. 
-Work only in a well-ventilated area or 
use a ventilation device to remove 
welding fumes from the environment 
where you will be working. 
-Do not weld on coated materials 
(galvanized, cadmium plated or 
containing zinc, mercury or barium).  
They will emit harmful fumes that are 
dangerous to breathe. If necessary 
use a ventilator, respirator with air 
supply or remove the coating from the 
material in the weld area.   
-The fumes emitted from some 
metals when heated are extremely 
toxic. Refer to the material safety 
data sheet for the manufacturer’s 
instructions.  
-Do not weld near materials that will 
emit toxic fumes when heated. 
Vapors from cleaners, sprays and 
degreasers can be highly toxic when 
heated. 

UV and IR Arc Rays 

The welding arc 
produces ultraviolet (UV) 
and infrared (IR) rays 

that can cause injury to your eyes 
and skin. Do not look at the welding 
arc without proper eye protection.  
-Always use a helmet that covers 
your full face from the neck to top of 
head and to the back of each ear. 
-Use a lens that meets ANSI 
standards and safety glasses. For 
welders under 160 Amps output, use 
a shade 10 lens; for above 160 Amps, 
use a shade 12. Refer to the ANSI 
standard Z87.1 for more information. 
-Cover all bare skin areas exposed to 
the arc with protective clothing and 
shoes. Flame-retardant cloth or 

Содержание ARC 70 164620

Страница 1: ...nd understand RULES FOR SAFE OPERATION and instructions before operating Failure to follow the safety rules and other basic safety precautions may result in serious personal injury ARC 70 Item 164620 OPERATOR S MANUAL ...

Страница 2: ...ertain applications only Northern Tool Equipment strongly recommends that this machine not be modified and or used for any application other than that for which it was designed If you have questions relative to a particular application DO NOT use the machine before you contact Northern Tool Equipment to determine if it can be performed on the product Before using this welding unit please read the f...

Страница 3: ...equires a 20 amp time delayed fuse or circuit breaker Out put is 50 amps at 20 duty cycle OCV 42 VDC Also includes load and thermal protection Designed to use for mild steel or alloys in DIY applications Welds up to 1 8 mild steel Specifications and Dimension MODEL SPECIFICATION Power supply 1ph 115V 60HZ No load voltage OCV 42V Output Range 50 70A Duty cycle 20 Suggested electrodes E6011 E6013 E7...

Страница 4: ...h amperage for an extended time the duty cycle can be exceeded the overload light will come on orange the machine will stop working until the temperature decreases to the acceptable operating temperature range If the overload light comes on it will take about 15 minutes for the unit to cool down and be ready to use Ground cable and clamp The ground cable and clamp is attached to the work piece to ...

Страница 5: ...re they are clean and in good operating condition before use 1 3 Use of Your Welder Do not operate the welder if the output cable electrode holder ground cable clamp or electrode is wet Do not immerse them in water These components and the welder must be completely dry before attempting to use them Follow the instructions in this manual Keep welder in the off position when not in use Connect groun...

Страница 6: ...injury or death Do not breathe in fumes emitted by the welding process Make sure your breathing air is clean and safe Work only in a well ventilated area or use a ventilation device to remove welding fumes from the environment where you will be working Do not weld on coated materials galvanized cadmium plated or containing zinc mercury or barium They will emit harmful fumes that are dangerous to b...

Страница 7: ...ters or matches Keep work lead connected as close to the weld area as possible to prevent any unknown unintended paths of electrical current from causing electrical shock and fire hazards To prevent any unintended arcs keep electrode away from grounded materials until you are ready to weld Hot Materials Welded materials are hot and can cause severe burns if handled improperly Do not touch welded m...

Страница 8: ...High voltage danger from power source Consult a qualified electrician for proper installation of receptacle This welder must be grounded while in use to protect the operator from electrical shock Do not remove grounding prong or alter the plug in any way Do not use any adapters between the welder s power cord and the power source receptacle Make sure the POWER switch is OFF when connecting your we...

Страница 9: ...rod and the grounded metal melts the electrode and the flux The most popular electrodes are E6011 60 000 PSI tensile strength deep penetrating applications E6013 60 000 PSI tensile strength used for poor fit up applications E7014 70 000 PSI tensile strength used for high deposition and fast travel speeds with light penetration E7018AC 70 000 PSI tensile strength Used for out of position and tackin...

Страница 10: ...eeded in the welding process Heavier and thicker metals require more voltage amperage whereas lighter and thinner metals require less voltage amperage 2 Welding techniques The best way to teach yourself how to weld is with short periods of practice at regular intervals All practice welds should be done on scrap metal that can be discarded Do not attempt to make any repairs on valuable equipment un...

Страница 11: ...ss the most commonly used arc welding beads The stringer bead Formed by traveling with the torch in a straight line while keeping the wire and nozzle centered over the weld joint The weave bead Used when you want to deposit metal over a wider space than would be possible with a stringer bead It is made by weaving from side to side while moving with the torch It is best to hesitate momentarily at e...

Страница 12: ...ts air from reaching the molten metal and creating an undesirable chemical reaction The burning coating however forms slag The slag formation appears as an accumulation of dirty metal scale on the finished weld Slag should be removed using a chipping hammer CHIPPING THE SLAG FROM A WELD JOINT CAUSES SMALL CHIPS OF SLAG TO FLY THROUGH THE AIR Slag flying through the air can cause eye injury or inju...

Страница 13: ...s not weld properly 1 Incorrect power input 2 Inadequate current at output 3 Poor connection of output cable 4 Dirty surfaces 5 Wrong welding wire 1 Check the power source 2 Check for proper grounding to the work piece 3 Check output connection 4 Clean surfaces 5 Use correct wire Welder blows circuit breaker or fuse Wrong circuit breaker or fuse in power supply Check the circuit breaker or fuse in...

Страница 14: ...Northern Industrial Welder ARC 70 Operating Instructions and Parts Manual 12 Main Circuit Chart ...

Страница 15: ...Northern Industrial Welder ARC 70 Operating Instructions and Parts Manual 13 Illustrated Parts List ...

Страница 16: ... holder 2 05 05 201 3 3 Front panel 1 05 81 01 1 4 Foot 2 05 05 016 4 5 Bottom 1 05 81 02 1 6 Back panel 1 05 81 04 1 7 Power cord with plug 2 03 05 140 1 8 Handle 2 05 08 027 1 1 9 Enclosure 1 05 81 03 1 10 Transformer 1 05 80 17 1 11 Thermal relay 2 07 36 410 1 12 LBD 1 05 81 07 1 13 Setting switch 2 07 80 031 1 14 Main switch 2 07 80 221 1 15 Electrode holder 1 05 80 06 1 ...

Страница 17: ... days of the failure so as to provide instructions on how to proceed with the repair of your welder and warranty claim processing Warranty period begins at the time the welder is purchased from Northern Tool Equipment Warranty Periods Limited Warranty is divided into four categories No warranty 6 months 1 year 2 year No Warranty Normal wear items MIG gun parts contact tips nozzle adapter MIG gun l...

Страница 18: ...Northern Tool Equipment Co 2800 Southcross Drive West PO Box 1219 Burnsville MN 55337 ...

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