Northern Industrial Tools ARC 70 164620 User Manual

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Read carefully and 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

Table of Contents

Questions and Answers:

S
Stephanie ConradJul 31, 2025
Why is my Northern Industrial Tools Welding System not welding properly?
- G
  gibsonrandallJul 31, 2025
  If your Northern Industrial Tools Welding System isn't welding properly, several factors could be the cause. First, check the power source to ensure it's correct. Inadequate current may be the issue, so verify proper grounding to the workpiece. Also, check the output connection for any poor connections. Dirty surfaces can impede welding, so ensure they are clean. Finally, confirm you are using the correct welding wire.
B
Brandon NealAug 15, 2025
What to do if Northern Industrial Tools ARC 70 164620 Welding System does not work when the main switch is on?
- W
  wstewartAug 15, 2025
  If your Northern Industrial Tools Welding System doesn't work when the main switch is on, there could be several reasons. - First, check the circuit or fuse of the power source to ensure there's power input. - Second, the power cord or plug might be broken, in which case you should replace the power cord. - Third, the main switch itself could be broken and needs replacement. - Finally, the transformer might be broken, requiring you to replace it.

Northern Industrial Tools ARC 70 164620 Specifications

General

Amperage Output at 20% Duty Cycle	70A
Input Voltage	120V
Weight	10 lbs
Duty Cycle	20% at 70 Amps
Electrode Size (in.)	1/16" - 3/32"
Welding Processes	Stick
Electrode Size	1/16 - 3/32 in.

Summary

Product Overview

Description

Specifications and Dimensions

General Safety Information

Welding Environment and Personal Safety

Covers safe work area, fire precautions, and keeping others clear.

Safe Operating Practices

Details safe stance, avoiding contact, and protective gear.

Specific Safety Hazards and Precautions

Electrical Shock Risks

Warns about shock hazards and dry conditions, securing ground.

Fumes and Gases Hazards

Advises on ventilation and avoiding toxic fumes from coated materials.

UV and IR Arc Ray Dangers

Stresses eye and skin protection from arc rays, specifying helmet and lens shades.

Additional Safety Warnings

Fire Hazard Prevention

Prohibits welding on combustible containers and clearing flammable materials.

Handling Hot Materials and Debris

Installation and Setup Procedures

Power Requirements and Connections

Specifies 115VAC, 20A circuit, proper grounding, and avoiding adapters.

Workpiece Preparation

Welding Preparation and Electrode Selection

Ground Clamp Connection

Electrode Types and Usage

Welding Operation Techniques

Setting Amperage Control

Guides setting MIN/MAX for different electrode sizes and practicing.

Basic Welding Techniques

Striking the Arc Safely

Details how to strike an arc and emphasizes immediate eye and skin protection.

Weld Quality and Maintenance

Judging Weld Bead Quality

Slag Removal and Maintenance

Troubleshooting Guide

Common Issues and Solutions

Provides a chart of symptoms, causes, and corrective actions for welder problems.

Parts Identification

Illustrated Parts List

Repair Parts Information

Repair Parts List