Beginner's Guide: Cutting Lead Cames for Your First Stained-Glass Project

I still remember the first time I tried to cut a lead came. I held the knife like a dagger, pressed way too hard, and watched the whole channel twist into a sad little pretzel. If you’ve ever felt that sting of frustration, you’re in the right place. Lead came cutting stumps a lot of beginners, but once you learn a few honest tricks, it becomes the most relaxing part of the whole process. Grab a cup of tea and let’s walk through it like we’re standing side by side in the workshop.

Why Lead Cames Are Your Panel’s Skeleton

Before we touch a knife, let’s get on the same page. Lead cames are those long, grooved strips of lead that hold your glass pieces together. They’re not just filler — they’re the structure. If your cames are cut sloppy, your whole panel fights you. If they’re cut clean and true, the glass practically falls into place. At Stained Glass Studio, I always tell my students that good came cutting is half the soldering skill you’ll ever need. It’s that important.

The Tools You Actually Need (and the Ones You Can Skip)

Walk into any stained-glass supply shop and you’ll see a wall of gadgets. Take a breath. For your first project, you only need a few simple things. Complicated tools won’t save you from a shaky hand or a rushed measurement.

The Lead Knife — Your New Best Friend

A sharp lead knife with a curved blade does the heavy lifting. You don’t need a fancy Japanese pull saw or electric shears. Find a knife that feels comfortable in your palm, not too heavy, and keep it sharp. A dull blade mashes the lead instead of slicing it, and that’s when the channels collapse. I use a classic horseshoe-shaped lead knife that fits my hand nicely. You’ll find yours.

Shears vs. Pliers — Don’t Complicate Things

Near the lead knife, you’ll often see lead shears with a weird offset handle. They’re designed to cut came without crushing the channels. For a beginner, though, a solid pair of lead snippers or even good-quality tin snips will do the job. I’ve seen people create beautiful work with nothing more than a knife and a small pair of pliers. The message here at Stained Glass Studio is simple: start with what you have and upgrade only when you feel the tool is holding you back.

Setting Up a Simple Cutting Station

You don’t need a dedicated bench. I started on a kitchen table with a piece of scrap plywood on top. The key is to have a surface that won’t bounce, a straightedge you can trust, and a block of wood or a cutting mat underneath the came. Cutting lead directly on a hard surface can dull your blade and distort the profile. I use a small piece of MDF board as a cutting pad — it’s cheap and replaceable. Good lighting matters more than you think. When you can really see the faint pencil mark, your cuts get cleaner.

The Art of Measuring and Marking

Here’s the part most tutorials skip. Lead came isn’t like cutting a piece of string. The metal has a springy memory, and the channel height changes how it sits against the glass. Always measure from the inside of the heart (the center web) of the came, not from the outer flanges. I use a soft 2B pencil and make a tiny dash right on the top of the flange. Never score the lead with a scriber — that weakens the came and leaves a permanent scar.

The “Overhang Rule” for Glass

When you’re fitting a came against a cut piece of glass, leave a whisper of extra length. Just a hair. You can always nibble a bit off, but you can’t add lead back. I aim for a 1/16 inch overhang past the glass edge. That little bit of lead will be trimmed during the final assembly and leaves you room to adjust the mitered corners. Every time I rush and cut exactly flush, I end up with a gap that fights me at the soldering stage.

How to Make the Cut (It’s All in the Wrist)

Now the moment you’ve been waiting for. Place the came flat on your cutting board, channels facing up. Hold the lead knife with a relaxed grip, not a death grip. The secret nobody tells you is that you don’t push straight down — you rock the blade. Start with the heel of the knife on the flange, then gently roll the blade forward and down in one smooth motion. Think of slicing a ripe tomato, not chopping a carrot. You want to cut through the top flange, the vertical web, and the bottom flange in a single pass if possible. If the came is thick, make two light passes instead of one heavy one. I pause just before the final bit and let the knife’s weight do the work.

Notching and Fitting — The Part Most Beginners Forget

A straight cut is only half the story. When two cames meet at a joint, you often need to notch one so the other slips in neatly. I use a small pair of nippers or the back of my lead knife to snip away a little section of the flange. The goal is to create a perfect little seat for the intersecting came. Don’t overthink this. Take off a tiny bit, test the fit, and repeat. It’s a gentle conversation with the material. Over at Stained Glass Studio, I keep a little scrap bin of notched came pieces just to show new friends that even tiny mistakes become part of the learning pile.

When Things Go Wrong: Fixing Crimps and Kinks

Lead is forgiving, but it remembers. If you accidentally bend a came or crimp the channel, don’t throw it away. Place the damaged section on a flat surface and gently roll a wooden dowel or a fid over the crushed area. The channel will open back up. For a twisted came, use your fingers to coax it straight, working slowly from one end to the other. The lead wants to behave — you just have to remind it. I’ve rescued many a came that looked hopeless, and those panels held together beautifully.

This Is Where the Magic Happens

Cutting lead cames isn’t just a technical step. It’s the moment your design stops being a drawing and starts becoming a real object. The first time you set a piece of colored glass into a perfectly cut channel and feel the gentle click of a good fit, you’ll understand why we do this. I’ve been cutting lead for years, and that little click still makes me smile. Your first project won’t be perfect, and that’s the whole point. Every wonky cut teaches you something. The stained glass community is full of people who learned by doing, and I’m right here with you.

So grab your knife, pick a simple geometric pattern, and make a few cuts just for practice. You don’t even need glass yet. Get to know how the lead feels under your blade. And when you’re ready, cut your first real came with the confidence that you’re building something that can last a hundred years. That’s the beauty of sharing these skills here at Stained Glass Studio — it’s never just about the project in front of you. It’s about the tradition you’re joining.