Getting the TIG tungsten stick out chart dialed in is the difference between a clean, stable weld and a puddle that wanders on you. In our research, the most common cause of bad gas coverage and arc instability is simply having the tungsten too far out of the cup. The TIG tungsten stick out chart is the first thing we check before setting up a torch.
Manufacturer specifications indicate that a 1/8-inch tungsten paired with a #8 ceramic cup typically runs best with a stick-out between 1/4 and 3/8 inch. That small difference of 1/8 inch changes your gas envelope and your arc focus. Let's walk through exactly how stick-out works and how to pick the right number.
Why Tungsten Stick-Out Is the Main Thing for a Clean TIG Weld
Stick-out is the distance your tungsten hangs past the nozzle. It controls three critical things: how well the shielding gas protects the weld, how focused the arc is, and how much visibility you have at the joint. Get it wrong and you'll chase problems all day.
Think about what happens when the tungsten sticks out too far. The shielding gas spilling off the cup has to travel extra distance before it reaches the puddle. By the time it gets there, the gas envelope is disrupted and the weld starts to oxidize.
You'll see gray, sooty streaks or tiny porosity bubbles. That's a classic sign your stick-out is too long.
Arc stability is the other big one. A longer tungsten acts like a flag in a breeze. It wanders, it flares, and it's much harder to keep a steady arc length.
That's why experienced welders keep the electrode as short as the joint allows. A compact stick-out gives you a tight, quiet arc and better puddle control.
The trade-off is visibility. You can't see the puddle if the cup is right on top of the joint. So the trick is finding the sweet spot: long enough to see what you're doing, short enough to keep the gas and arc under control.
That's exactly what the TIG tungsten stick out chart helps you do.
If you're new to the TIG process, it's worth remembering that stick-out doesn't live in isolation. Your cup size, tungsten diameter, and gas flow all work together. Change one and the others shift.
The chart just gives you a reliable starting point.
What "Stick-Out" Actually Means and How We Measure It
Let's get the definition locked down, because there's confusion out there. Stick-out is measured from the face of the ceramic cup to the end of the tungsten electrode. Not the collet.
Not the torch body. Just the cup face to the tip.
That distinction matters more than you might think. On some torches, the cup sits flush with the collet body. On others, it recesses slightly or extends forward.
If you measure from the wrong spot, you'll be off by an eighth of an inch or more. That's enough to ruin your gas coverage.
The simplest way to measure is with a small steel ruler or a caliper. Hold the ruler against the side of the cup and read the distance to the tungsten tip. It's rough, but it gets you repeatable.
Better yet, some welding supply shops sell a plastic stick-out gauge that clips onto the cup. You set the tungsten, tighten everything down, and check the gauge.
Here's what the measurement reference looks like in practice:
| Measurement Point | What You Measure |
|---|---|
| Cup face (nozzle) | Where the stick-out measurement starts |
| Tungsten tip | Where the measurement ends |
| Gas lens face | If you use a gas lens, measure from the lens face, not the cup rim |
Most torch components follow standard naming, so it helps to know the basics. The collet holds the tungsten, the collet body secures the collet, and the ceramic cup threads over the top. A gas lens replaces the standard collet body and uses a mesh screen to distribute gas more evenly.
That's your setup for longer stick-out.
Why This Topic Needs a Visual Chart to Make Sense
You can describe stick-out in words all day, but numbers alone get confusing fast. "Set it at 3/16 inch" sounds simple until you're holding a torch with a #6 cup and a 1/16-inch tungsten. The proportions don't mean anything from a text description.
A visual chart makes the relationship obvious. It shows a cutaway view of the torch head with the tungsten position clearly visible. You can see how, say, a 1/4-inch stick-out fills the cup and where the gas envelope starts to form.
In our research, almost every welder who had a stick-out problem said the same thing: they couldn't picture what the correct length looked like.
The shape of the cup matters too. A narrow #5 cup has a tight gas column, so a short stick-out is mandatory. A wide #12 cup creates a broader gas envelope, which allows more tungsten exposure.
Without the visual side-by-side, that's hard to judge.
That's also why this topic relies on a chart rather than a simple rule. A photo or diagram shows you the difference between a good setup and a marginal one. It shows when the tungsten tip is tucked inside the cup and when it's dangerously exposed.
Once it clicks visually, you'll set it right every time.
If you're comparing welding processes, this visual element is part of what makes TIG feel precise. Other processes like MIG and stick are more forgiving with electrode position. For TIG, the geometry controls the outcome.
The chart bridges that gap between reading numbers and understanding the actual torch setup.
The Reference Chart: Stick-Out by Cup Size, Tungsten Diameter, and Gas Lens Setup
Here's the starting point that most experienced welders and manufacturer specs point to. It's not a universal law, but it gets you in the ballpark every time.
| Cup Size | Tungsten Diameter | Standard Stick-Out | Gas Lens Stick-Out | Gas Flow (CFH) |
|---|---|---|---|---|
| #5 | 1/16 inch | 1/8 inch | 3/16 inch | 10–15 |
| #6 | 3/32 inch | 3/16 inch | 1/4 inch | 12–18 |
| #8 | 3/32 inch | 1/4 inch | 3/8 inch | 15–20 |
| #10 | 1/8 inch | 3/8 inch | 1/2 inch | 20–25 |
| #12 | 1/8 inch | 3/8 inch | 1/2 inch | 20–25 |
A few things jump out from that chart. First, the gas lens allows a longer stick-out because it spreads the shielding gas more evenly. That's why pipe welders and aluminum work favor gas lenses so heavily.
You get better coverage with the tungsten further out, which means better access to tight joints.
Second, cup size and stick-out go up together. A bigger cup creates a wider gas column, so the tungsten can extend further without losing protection. But that also means the torch gets more bulky and harder to maneuver.
You trade precision for coverage.
Third, these numbers assume you're welding in a flat or horizontal position. Out-of-position work, like overhead or vertical, usually needs a shorter stick-out to keep the puddle stable. You might drop down a full 1/16 inch from the chart values.
If you're working on thin sheet metal welds, err on the shorter side. A tight stick-out keeps the heat focused and reduces the chance of burn-through. For heavy steel jobs, you can stretch the stick-out toward the higher end of the range and count on the bigger gas envelope.
Step-by-Step: Setting Stick-Out Like a Pro
Setting stick-out correctly takes about thirty seconds once you've done it a few times. Here's the sequence that works.
- Pick your cup and gas lens first. The stick-out number depends on the hardware, so make that decision before anything else.
- Insert the tungsten into the collet. Make sure it grabs about halfway up the electrode. If it's barely held, the arc will wander.
- Hand-tighten the back cap. You want the tungsten snug but not locked down yet. Leave it loose enough to slide up and down.
- Push the tungsten until it protrudes past the cup. Use the chart above as your target.
- Measure from the cup face to the tip. A quick check with a ruler works. If you have a gauge, even better.
- Fully tighten the collet body and back cap. Make sure the tungsten doesn't twist or slip as you snug it down.
- Set your gas flow to match the cup. Use the CFH numbers from the chart as a baseline.
- Strike a test arc on a scrap piece. Watch the gas envelope and the arc shape. If it flares, tuck the tungsten in a bit more.
The most common mistake we see is setting the stick-out before choosing the gas lens. People dial in a length for a standard cup, then swap to a gas lens and wonder why the arc looks different. Always match the stick-out to the cup and lens combination.
Another mistake is measuring when the tungsten is already tapered or contaminated. If you just dipped the tungsten in the puddle, the end is ruined. You have to dress the tip first.
The stick-out measurement is meaningless if the tip geometry is wrong.
For steel jobs, grinding the tungsten to a point before setting stick-out makes a visible difference. A sharp, consistent taper helps the arc start cleanly and stay focused. Take the time to grind it properly, and you'll see why the pro welders make such a fuss over prep.
Gas Lens vs. Standard Cup: How It Changes Your Stick-Out
A gas lens changes the whole gas envelope. Instead of dumping argon through a narrow cup, the gas spreads through a fine mesh screen. This creates a slower, more consistent flow that covers a wider area.
That's why a gas lens lets you run a longer stick-out without losing shielding.
With a standard cup, keep your stick-out short. The gas stream is more turbulent, especially at the edges. Once you pass about 1/4 inch, the coverage gets thin.
You'll notice it on stainless steel when the weld starts to show straw or blue colors instead of staying silver.
A gas lens buys you room to work. You can push the tungsten out to 3/8 inch or even 1/2 inch with a #10 cup. That extra reach is a lifesaver on pipe joints and repair work where you can't get the torch head close.
The trade-off is bulk. A gas lens adds length and diameter to your welding torch, making it harder to fit into tight spots. For small cups like #5, the difference is minimal.
For bigger jobs, the extra size is worth the shielding performance.
Who should switch? Anyone doing pipe, aluminum, or overhead work. A standard cup is fine for bench work and sheet metal, where you can position the torch freely.
Switch to a gas lens when access gets tight and you need more reach.
Common Visual Mistakes and How to Spot Them
The most common mistake is too much tungsten sticking out. You'll see it instantly in the weld bead and the gas coverage. The weld may look gray or sooty on stainless.
The arc might flare or dance when you lift off. Those are signs the shielding gas isn't reaching the puddle.
Another sign is porosity. Tiny pinholes appear in the bead because air sneaks in before the gas envelope seals the weld. Heavy tungsten wear or a melted-back tip also means you've run the electrode too hot and too far out.
The opposite mistake is having the tungsten too short. The cup blocks your view of the puddle, and you end up holding the torch at a strange angle. That leads to inconsistent travel speed and a wandering bead.
You're also more likely to dip the cup into the weld.
A third mistake is measuring from the wrong spot. Stick-out starts at the cup face, not the collet body. With a gas lens, start at the lens face.
If you measure from the torch body, you'll be off by an eighth of an inch or more.
How Stick-Out Works for Pipe, Aluminum, and Tight Joints
Pipe welding is where stick-out gets pushed to the limit. On root passes, you often need to reach into a narrow gap. Welders run a #6 or #8 cup with a gas lens and keep the tungsten at 1/4 to 3/8 inch.
This gives enough reach to see the root and still keep coverage.
Aluminum is a different animal. Because you're running AC, the tungsten forms a balled tip and the arc is less focused. A longer stick-out helps you see the puddle and control the cleaning action.
Many aluminum welders run 3/8 inch with a #10 cup. More on aluminum prep here.
Tight joints are where the standard cup wins. A #5 cup with a 1/8 inch stick-out fits into corners and fillets that a big gas lens can't reach. The rule is simple: when access is tight, shrink the cup and shorten the stick-out.
Thin sheet metal follows the same logic. Keep the stick-out short to concentrate heat and reduce distortion. A compact setup gives you a precise, controlled arc that's tough to beat on material under 1/8 inch.
Pro Tips for Tungsten Prep and Cup Selection
The right stick-out does nothing if the tungsten tip is wrong. For DC steel and stainless, grind the tungsten lengthwise with a fine wheel. Keep the taper about 2.5 times the tungsten diameter.
For a 1/16 inch rod, that's roughly a 5/32 inch taper.
On AC aluminum, you usually want a balled tip instead of a sharp point. Once balled, the tungsten sits at its natural working shape. The ball size should be about the same diameter as the tungsten rod.
As of 2026, lanthanated tungsten is a popular choice because it handles both AC and DC well.
Cup selection depends on the joint, not just the amperage. A #6 cup works for general bench welding. A #8 cup is the sweet spot for all-around use.
Go larger when you need real gas coverage on thick material.
Also check the grind direction. Grind along the length of the electrode, not across it. A cross-ground tip causes the arc to walk around the end, which makes the puddle unstable.
This is one of the small details that separates clean welds from frustrating ones. The TIG process rewards careful prep.
Safety Notes on Tungsten Grinding and Arc Exposure
Grinding tungsten isn't just about a clean point. Thoriated tungsten contains a small amount of radioactive thorium. The dust from grinding can be inhaled, so use a local exhaust system and a respirator.
If you do a lot of grinding, consider switching to ceriated or lanthanated tungsten instead.
The arc itself is another hazard. TIG produces intense UV radiation that can burn skin and cause serious eye damage. Even with a welding helmet, cover your arms and wear a leather jacket.
Never look at the arc without a proper shade lens.
The tungsten gets hot too. It's easy to touch it right after a weld and blister your fingers. Keep the torch away from your body when not in use.
Manufacturers and OSHA welding safety guidelines recommend keeping your work area clear of flammables and maintaining adequate ventilation.
Quick Answers to Frequent Stick-Out Questions
What is the ideal stick-out for a #8 cup?
For a #8 ceramic cup with 3/32-inch tungsten, start at 1/4 inch. With a gas lens, you can push it to 3/8 inch. That range keeps the gas coverage solid and gives you enough visibility.
How do I measure stick-out correctly?
Measure from the cup face to the tungsten tip. Use a small ruler or a stick-out gauge. Don't measure from the collet body, or you'll be off by an eighth of an inch.
Does a gas lens change my stick-out?
Yes. A gas lens spreads the shielding gas more evenly, so you can run a longer stick-out safely. Standard cups need a shorter stick-out to keep coverage intact.
What happens if my tungsten is too far out?
You get arc wandering, porosity, and oxidation on the weld. The shielding gas disperses before it reaches the puddle. On stainless steel, you'll see gray or straw-colored discoloration.
What stick-out should I use for aluminum?
Most aluminum welders run 3/8 inch with a #10 cup and a gas lens. The longer stick-out helps you see the puddle and manage the AC cleaning action.
Final Verdict: Keep This Chart Near the Welding Bench
Getting the TIG tungsten stick out chart dialed in is a skill you build with repetition. Start with the baseline values, then adjust for your torch, cup, and joint. Measure twice, weld once.
The real lesson is that stick-out never works alone. Cup size, gas flow, tungsten prep, and amperage all work together. Change one and you need to rethink the others.
That's why the chart is a starting point, not a rule book.
Keep a copy of the chart near your welding bench. It takes one second to check and saves you from a weld you'll grind out anyway. If you're exploring the TIG process, understanding the torch setup is where the craft really starts.
