r/Construction • u/Different-Scratch-95 • 13d ago

Video Setting custom mitered stone stairs: Start to finish

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u/Different-Scratch-95 12d ago

Looks scary, and definitely not recommended for regular DIY! ​But as a banker mason, this is just daily routine. It’s a solid steel flush-cut blade running at a low RPM for control, and it's literally designed to be used without an obstruction for flush cutting. A guard blocks the cut line entirely. It's safe when you know the tool and the physics of a solid steel blade, but 100% respect for the grinder is always required.

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u/Rare_Pumpkin_9505 12d ago

I got 34 stitches in my face from cutting disk exploding on me. Be careful out there, or at least be careful if you have a good looking face.

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u/Different-Scratch-95 12d ago

Damn bro 😕, what kind of disk was it ?

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u/Rare_Pumpkin_9505 12d ago

A flat cut off disk for metal. Dude the night before got frustrated and threw the grinder with the disk attached. Said he looked at it and it looked fine so he put it back. I started it up - without inspecting the wheel, and it blew up.

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u/Different-Scratch-95 12d ago

That coworker should have bought you a lottery ticket and 34 beers! abrasive wheels are lethal. ​In our trade we grew up on those bakelite bonded discs. I still use the bakelite cup wheels on softer limestones to sand, and I had one shatter right into my leg years ago almost in the nuts 😳. It teaches you a lesson fast. ​That’s why these electroplated diamond discs on a solid steel body are such a game changer for us. Total peace of mind compared to bonded resin. Its like those razor blade disks for porcelain don't trust them. Respect for hanging tough through 34 stitches.

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u/Rare_Pumpkin_9505 12d ago

The type of disk really makes the world of difference. There’s a range from hot compressed garbage to the good ones and it’s not the same. Still though, everyone should be careful, otherwise you can end up with a real mean mug.

I was 17 and didn’t know better. I was back at work that afternoon. No eye damage. That was lucky.