Tried to cut a big circle with just a hand cutter and a lot of hope.

Had a job for a cafe in Portland, they wanted a round table top from a single sheet of 3/4 inch glass. Thought I could score it and tap it out like a normal cut. The first try, the score line just stopped halfway and the whole piece cracked in a wild zigzag. My helper just looked at it and said, 'Well, that's modern art now.' Learned you really need a proper circle cutter for anything over a foot wide. Anyone have a good brand they like for big round work?

4 comments

4 Comments

simonk981mo ago

Yeah, that "wild zigzag" crack is a classic. Glass wants to follow its own stress lines once a score goes wrong. For big circles, a hand cutter just can't keep the angle and pressure even all the way around. I've had good luck with the Toyo TC-20 circle cutter. The suction cup base is key because it holds itself in the center so you can focus on the scoring wheel. You still have to go slow and use a steady amount of oil on the score line.

derekhunt1mo ago

Wait, you use oil on the score line? I've been cutting glass for years and never heard of that. What does that even do, keep the wheel from skipping? Seems like it would just make a mess.

young.ryan3d ago

Yeah, it does sound messy, but a little oil on the wheel makes a cleaner score. It helps the cutter glide and stops the glass from chipping out. Simonk98 is right about it for circles too, keeps the pressure even.

jake_wells121mo agoMost Upvoted

Ever notice how many things in life look easy until you need perfect results? That's when you learn the hard way that the right tool isn't a luxury, it's the whole job.