Arc welding, or Shielded Metal Arc Welding (SMAW), is the stick welding most people picture when sparks start flying in a garage. It lays down a strong joint, bites through rust and paint that would ruin a cleaner process, and needs no external gas bottle like MIG welding does.
It asks for more patience than TIG welding, yet nothing beats it for outdoor repairs and heavy structural work where a light breeze would blow shielding gas clean off the puddle.
The gear is cheap and the idea is simple. This guide walks you through your first weld, from dialing in the machine to chipping the slag, without burying you in jargon.
Key Takeaways
- Versatility: Arc welding is affordable, works on dirty or rusty metal, and is effective outdoors, making it ideal for farm repairs and structural work.
- Technique: Always “drag” the rod for flat welds; hold the electrode at a 10 to 15-degree angle and pull it toward you.
- Settings: Match your amperage to your electrode size and material thickness; generally, start between 80 and 100 amps for 1/8-inch rods.
- Safety First: The UV radiation is intense; always wear a proper welding helmet, flame-resistant jacket, and leather gauntlets.
What Is Arc Welding?
Arc welding involves using electricity to create enough heat to melt metal. You use a consumable electrode (the “stick”) covered in flux. When the rod touches the metal, it completes an electrical circuit, creating an intense arc that melts both the rod and the base metal.
As the rod melts, the flux coating burns off and creates a shielding gas. This gas protects the molten pool from oxygen and other contaminants in the air. Once it cools, the flux hardens into a crust called “slag” that sits on top of your new weld. This method produces high tensile strength and deeper penetration than most other DIY-friendly processes.
Do You Push or Pull the Rod?
In stick welding, you almost always pull (or drag) the rod. If you push, the slag gets trapped inside the molten pool, ruining the weld’s integrity. The only exception is vertical-up welding, where a pushing motion helps fight gravity.
For flat welds, hold the stick at a 10 to 15-degree angle and drag it along the seam. You can simply drag in a straight line (stringer bead) or use a slight motion to widen the weld.
Top Tip
How To Arc Weld for Beginners
Before striking an arc, you need the right gear. Welding is hot, bright, and sparks fly everywhere. Never skimp on personal protective equipment (PPE).
Here is the essential gear you need to get started:
- Arc welder: A machine capable of DC (Direct Current) is preferred for smoother welds.
- Electrodes: 6013 or 7018 rods are great for beginners.
- Ground clamp: Essential for completing the electrical circuit.
- Electrode holder: The insulated handle that grips the stick (often called a stinger).
- Chipping hammer: Used to smash the hardened slag off the finished weld.
- Wire brush: Cleans the metal before and after welding.
- Angle grinder: Cleans and bevels the metal before you weld.
- Welding table: A sturdy, non-flammable surface to work on.
Safety gear is non-negotiable. Here is what you must wear:
- Welding helmet: Ensure it has a shade rating of 10 to 12 to protect your eyes.
- Respirator: An N95 mask or welding respirator protects lungs from toxic fumes.
- Welding gloves: Heavy leather gauntlets prevent burns from UV rays and spatter.
- Welding jacket: Leather or flame-resistant cotton prevents clothes from catching fire.
- Natural fibers: Wear 100% cotton or denim; synthetics like polyester will melt into your skin.
- Work boots: Leather boots prevent sparks from burning your feet.
Fume Warning
1. Dial in the Welder
Success starts with settings. If you are welding mild steel, ensure your polarity is correct (usually DCEP/Reverse Polarity for stick). For a standard 1/8-inch electrode, set your machine between 80 and 100 amps to start. A handy rule of thumb is roughly 1 amp per 0.001 inch of rod diameter, so a 1/8-inch (0.125-inch) rod tops out near 125 amps (2); beginners usually start at the low end and dial up until the arc runs smoothly.
If the amperage is too low, the rod will stick to the metal. If it is too high, the rod will turn red hot and spatter aggressively. Check the box your electrodes came in; the manufacturer always prints the recommended amperage range there.
2. Prep the Metal
Welding over paint, rust, or oil is a recipe for failure. While stick welding is more forgiving than TIG, you still want clean metal for a strong bond. Use an angle grinder with a flap disc to grind the area until it is shiny, bare metal.
If the metal is thick (over 1/4 inch), use the grinder to bevel the edges. Creating a V-groove allows the weld to penetrate all the way through the joint.
3. Secure the Work Area
Sparks can fly up to 30 feet. Clear away sawdust, oily rags, paper, or any flammable liquids. Ensure you are working on a metal table or a concrete floor. Never weld on wood.
Ventilation is key. If you are in a garage, keep the door open and use a fan to pull fumes away from your face.
4. Clamp the Workpiece
Metal warps when it gets hot. Clamp your pieces tightly to the table using C-clamps or locking pliers. This prevents the joint from moving or lifting while you are trying to run a bead.
5. Attach the Ground
A bad ground connection causes a sputtering, weak arc. Clamp the ground cable directly to the workpiece if possible. If the piece is too small, clamp it to the metal table. Wiggle the clamp to ensure the teeth bite through any remaining grime for a solid electrical connection.
6. Gear Up
Put on your jacket, apron, gloves, and helmet. Ensure no skin is exposed. UV radiation from arc welding can cause “arc flash” (essentially a sunburn on your eyes and skin) in seconds.
7. Power On
Flip the switch on the welder. You will hear the fan kick on. Grip the electrode holder (stinger) comfortably in your dominant hand. Position the rod so it is comfortable to drag across the joint without contorting your wrist.
8. Strike the Arc
This is the hardest part for beginners. Think of it like lighting a match. Quickly scratch the tip of the rod against the metal and lift it up immediately.
If you just poke the metal, the rod will fuse to it. If it sticks, quickly jerk the handle side-to-side to break it free. Once the arc ignites, hold the tip about 1/8-inch away from the metal.
Top Tip
9. Run the Bead
Once the arc is stable, tilt the rod 15 degrees in the direction of travel and start dragging. Keep your arc length (the distance between rod and metal) tight, roughly the diameter of the rod itself.
Watch the molten puddle, not the bright light. You want to move at a steady pace. If you go too fast, the weld will be thin and weak. If you go too slow, the metal will pile up. Listen to the sound; a good arc sounds like frying bacon.
10. Break the Arc
When you reach the end of the joint, pause for a split second to fill the “crater” at the end, then quickly snap the rod away from the metal to sever the arc. Turn off the machine and set the holder down on a non-conductive surface.
11. Chip the Slag
The weld will be covered in a dark, crusty layer of slag. Wait a moment for it to cool (the slag often peels up on its own as it cools). Put on safety glasses, grab your chipping hammer, and tap the slag to break it off.
12. Inspect and Clean
Use a wire brush to scrub away the remaining debris. A good weld should have consistent ripples (like a stack of dimes) and blend smoothly into the base metal. If there are holes (porosity) or the edges are eaten away (undercut), you may need to adjust your speed or amperage.
Top Tips for Better Welds
Use Fresh Electrodes
Old rods absorb moisture from the air. Damp flux creates steam in the arc, leading to rough welds and porosity (tiny holes in the metal). Store your rods in a sealed container. If you are using low-hydrogen rods like 7018, they often require a rod oven to perform perfectly.
Watch Your Angles
Body positioning is half the battle. If you cannot see the puddle, stop and move your head. Ensure you are comfortable and braced against the table so your hand remains steady. If your travel angle gets too steep, you will lose penetration.
Tack It First
Don’t just start welding from one end to the other. Place small “tack welds” at the beginning, middle, and end of the joint. This holds the alignment in place and prevents the heat from warping the metal out of square.
Choose the Right Rod
Not all sticks are equal.
- 6010 / 6011: Deep penetration, fast freezing. Great for rusty metal or gaps, but leaves a rougher finish.
- 6013: The “farmer’s rod.” Easy to strike, works on AC welders, and leaves a pretty bead. Ideal for thin metal.
- 7018: The structural standard. Smooth, strong welds, but requires clean metal and proper storage.
FAQs
It’s All About the Arc
Two things decide whether a stick weld holds: how tight you keep the arc length and how steady your travel speed stays. Nail those and the rest, rod choice, amperage, slag cleanup, starts to click. Burn through a box of cheap 6013 on scrap metal before you touch a real joint, because the muscle memory matters more than any chart. When the puddle flows even and the arc hums like frying bacon, you have got it.
