Is it safe to cut steel with a miter saw?
I have a small project and I need to cut 3/4" steel square tube. I already own a miter saw, and I don鈥檛 have the space or otherwise a need for a dedicated tool for cutting metal. I was hoping to just pick up a metal-cutting circular saw blade and use that.
My googling seems to either tell me it will cut like through butter or it will explode in my face and set fire to the house and my wife will leave me and take the kids with her.
It can be done with the proper cutting blade/wheel.
Just keep in mind that you aren鈥檛 cutting wood so you may need to go slower than you normally would, and I would use a clamp to the hold the work piece.
Might be worthwhile to try some practice cuts as well.
My saw has a built-in clamp, but it鈥檚 fairly cheap. I鈥檇 feel better using a proper clamp for sure.
One thing that is overlooked here by the other posts is that the blade speed on a wood miter saw is too fast for the metal cutting blade. If you look at the fein slugger or evolution rages, they operate at lower rpms. It might work but you need to make sure you don鈥檛 overspeed the blade.
I believe my saw is locked to 5000 rpm.
I know that chop saws and cold saws usually used for metal run a lot slower, but you can buy metal-cutting blades for regular circular saws. I understand that I would have to move very slowly compared to cutting wood, but I can鈥檛 slow down the blade itself.
Do you have an angle grinder? If you don鈥檛 need perfectly clean cuts, that might be a better option (and doesn鈥檛 take as much space)
I don鈥檛 own one, and I have no use for one outside of this one project. I鈥檓 gonna need to do maybe a dozen cuts.
I鈥檓 not going to buy one, but I know it鈥檚 the better option if the choice is there.
Second this. Why take the risk of abusing a tool designed for different work when there are readily available cheap tools that are more suitable for the job?
If there鈥檚 only a few cuts to make you can also just use a (metal cutting) handsaw. Hand tools are usually the safest option as they give you much more control and sensitivity/feedback than any power tool. The worst that can happen is a skin deep cut or graze, or a broken blade that is easy to replace. You just need to have a bit of time and a bit of patience.
Take all the safety precautions (clamp it, safety goggles, hearing protection, double condom, mother on speed dial) until you understand how it behaves and use a metal cutting blade. Also use some cutting oil.
Don鈥檛 do what I saw one home improvement professional idiot doing - repeatedly slamming the blade into the workpiece until the blade stalls. It was painful to watch.
Oil鈥檚 a good call that I hadn鈥檛 seen mentioned yet.
You need the right blade and need to go very slowly but, yes.
What you鈥檙e looking for is a portaband. A hand held tool you can put on a shelf so it doesn鈥檛 eat up space. Swapping blades lets you use them on wood too.
As for your miter saw, safe is kind of a relevant term. You can do it with the right blade. Personally I wouldn鈥檛 go past aluminum.
What鈥檚 wrong with a hack or reciprocating saw?