Getting your MIG torch angle right is one of the most important fundamentals of good welding. Hold it wrong and you'll end up with poor penetration, excessive spatter, and weak welds — hold it correctly and you'll lay down smooth, consistent beads every time. The good news is that once you understand the two key angles involved, it becomes second nature.
The Two Angles You Need to Know
Every MIG welding position involves controlling two separate angles simultaneously:
- Travel angle (also called the torch angle): the angle of the torch relative to the direction you're welding, measured from vertical.
- Work angle: the angle of the torch relative to the workpiece surface or joint, measured from horizontal.
Getting both right for your specific joint type is what separates a tidy weld from a messy one.
Travel Angle: Push vs Drag
The travel angle describes whether you're pushing or dragging (also called pulling) the torch as you weld.
Push Technique (Forehand)
You angle the torch forward in the direction of travel, typically 5–15° from vertical (leaning toward where you're going). This technique:
- Produces a flatter, wider bead
- Gives better visibility of the weld pool ahead
- Results in slightly less penetration
- Works well on thinner materials
Drag (Pull) Technique (Backhand)
You angle the torch back, away from the direction of travel, again typically 5–15° from vertical (leaning back over the completed weld). This technique:
- Produces a narrower, higher bead with deeper penetration
- Is often preferred for thicker steel
- Can make it slightly harder to see ahead of the pool
For most general MIG welding — especially with solid wire and shielding gas — a slight push angle of around 5–10° is the most common recommendation. With flux-core wire (gasless MIG), a drag technique is generally preferred. Always check your wire manufacturer's data sheet for their specific recommendation.
Work Angle: Getting the Joint Right
The work angle varies depending on the type of joint you're welding:
| Joint Type | Recommended Work Angle |
|---|---|
| Flat butt joint | 90° (torch perpendicular to plate) |
| Horizontal fillet (T-joint) | 35–50° into the joint corner |
| Lap joint | 30–45° toward the lower plate |
| Vertical joint | 90° to the seam, travel angle adjusted |
| Overhead joint | 90° to the seam, slight drag angle |
For a T-fillet weld — one of the most common joints in DIY fabrication — aim for roughly 45° into the corner between the two pieces, with a 5–10° drag or push travel angle. This ensures even fusion into both plates.
Stick-Out: Don't Forget the Wire
Alongside torch angle, contact tip-to-work distance (also called stick-out) matters enormously. For most MIG welding with solid wire, aim for 10–15 mm of wire stick-out from the end of the contact tip. Too much stick-out reduces penetration and increases spatter; too little risks burning back into the tip.
Common Angle Mistakes and How to Fix Them
- Too steep (torch nearly horizontal): Causes poor shielding gas coverage, porosity, and a messy bead. Keep the torch closer to vertical.
- Excessive travel angle (over 20°): Leads to poor penetration and a ropey, uneven bead. Reduce your angle.
- Inconsistent angle while moving: Practice steady hand movement. Rest your forearm on the bench or workpiece where possible to stabilise your travel.
- Wrong work angle on a fillet: If one plate gets more heat than the other, adjust your work angle toward the thicker or cooler piece.
Welding Position Affects Everything
The flat (1G/1F) position is easiest — gravity works with you and your torch angles are straightforward. As you move to horizontal (2G/2F), vertical (3G/3F), and overhead (4G/4F) positions, maintaining consistent angles becomes harder. Beginners should practise flat and horizontal positions first before attempting vertical or overhead welds.
Safety First: NZ Welding Hazards
MIG welding produces UV radiation, fumes, spatter, and electrical hazards. Always:
- Wear an auto-darkening welding helmet rated to AS/NZS 1338
- Use leather welding gloves and a welding jacket or sleeves
- Ensure adequate ventilation — welding fumes are a serious health risk; refer to WorkSafe NZ for guidance on fume exposure limits
- Keep a fire extinguisher nearby and clear flammables from the area
- Never weld on galvanised, painted, or coated steel without understanding the toxic fumes involved
When to Call a Professional
DIY MIG welding is fine for general fabrication, repairs, and hobby projects around the home. However, structural welding — such as on trailers, vehicle chassis, load-bearing frames, or anything covered by the NZ Building Code — should be carried out by a qualified welder with the appropriate certification. Structural welds may need to meet Standards NZ requirements (such as AS/NZS 1554 for structural steel welding), and substandard work can be a serious safety risk.
If you're unsure whether your project requires certified welding, it's always worth getting a professional opinion. You can find qualified local welders on tradedirectory.co.nz.
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