Milwaukee M12 Cut Off Tool - Sheet Metal Frustration

DennisVog · May 15, 2026

I have a Milwaukee 2522-20 M12 FUEL 3" CUT OFF TOOL. My goal is to cut 18-gauge mild steel sheet metal into coupons.

The product description says is designed for cutting various metals and steels. I have tried to use it numerous times with the Milwaukee supplied 3 in. x 0.040 in. x 3/8 in. metal cut off wheels. It has been terrible:
* If I run the saw with forward rotation of the wheel, the saw wants to skip out of the cut and across the surface.
* If I run the saw in reverse, it does not skip, but bogs down in the cut. I can't even cut 6-inches before it stops.

I am clamping the sheet to my work bench. One side is fully supported. The other is extended off the bench a few inches.

What am I doing wrong? This is the intended purpose of the tool. They have been selling it for years with good reviews. I had it replaced once and had the same results with the replacement. I don't get it. I'm sure I'm doing something stupid, but I don't know what. I'm ready to throw it away.

P.S. I can make the same cut with my M12 die grinder using similar blade. It cuts fine, but is harder for me to get a straight cut with it. The cut off tool gives me a better angle for visibility and has a guard that I can run along a guide.

IndyGarage · May 15, 2026

I use one of those, but I don't think I'd use it with sheetmetal because I don't think it's powerful enough and it has the overload cut out.

I think sheetmetal is harder to cut because you have the entire length of the cut dragging on the blade if you can't hold it perfectly straight - which is very difficult.

The M12 cutoff tool is more for cutting off bolts and really small stuff - which it works great for. I would use an angle grinder with a cutoff blade for what you are trying to do - even the smallest ones have probably 10x the power.

CGT80 · May 15, 2026

Use a circular saw and metal cutting blade.....they are about 30 bucks at home depot and I have cut 1/4" plate with my m18 6.5" milwaukee cordless.

Yankeefarmer · May 15, 2026

I have that tool and it’s one of my favorites. I suspect you are burying the wheel in the cut, where a small degree of misalignment sideloads the wheel. Try keeping the tool elevated to where the outer circumference of the wheel just penetrates the metal. Like others have said, for long cuts, a cut off wheel on a corded angle grinder may work better. I have a HF one with a HF depth gauge attachment that works well for that sort of situation.

If that doesn’t work, before you throw it out, PM me for my address. I’ll pay for the shipping.

PugetDude · Saturday at 9:59 PM

I have the M12 cutoff tool, it's great for cutting welded wire, expanded metal, #3 rebar, or an occasional bolt. If I'm making a long cut in sheet metal I use my 3" Ryobi 18V cutoff tool or a 4.5" angle grinder with an ultrathin cutoff wheel, depending on gauge and length of cut. If I am cutting thicker material (bar stock or plate) I use my Makita 6" diameter 13 amp angle grinder with a Walter high performance cutoff wheel. ( Thanks, @LXCam ) ...if I really want to make sparks I have an old B&D Professional 7.5" angle grinder that I break out occasionally...

Different horses for different courses.

KwikFab · Saturday at 10:02 PM

I got that same tool when it came out a few years ago, and while I do have many other tools for metal fab, I've used my M12 cut off tool for 3/16" steel plate as well as solid rod.

I'm talking 1" thick, 5/8", 3/16" and whatever else I've got laying around.

I've never had an issue cutting anything with it.

Edit: Added a pic of a cut out (hitch) where I used that mini tool on 3/16" without issue. People saying they can't reliably cut steel sheet/plate are doing it wrong.

readhead · Saturday at 10:41 PM

I’m not sure that you are using the right tool for the job. Having owned a fab shop for many years I had to have a lot of guys qualified. The testing company required us to provide coupons and they could only be sawn or sheared. Cut off wheels can leave inclusions in the weld field.

LXCam · Saturday at 10:53 PM

I’m thinking @Yankeefarmer nailed it. How deep do you have the guide set for.

Jgaz · Saturday at 11:13 PM

I’m solidly in the M12 camp for a number of tools but when I was looking to buy this tool I asked @PugetDude for advice.

After discussing my intended usage with him I purchased the Ryobi 18 volt.
I’m not a fabricator but I’ve been very satisfied with my Ryobi.
Since I’m already invested in their battery platform it made the decision even easier.

I cut metal much the same way as @PugetDude described above. But the Ryobi was worth the price for me. (Check out Direct Tools often)

drmarkr · Saturday at 11:51 PM

I've had one for several years. It's really only good for small short cuts or quick cut offs of bolts, etc. At least that's been my experience.

Just doesn't have enough power to do much more than that. I agree with finding something 18 volt. Either that or use pneumatic nippers

T444e · Saturday at 11:58 PM

I like the Milwaukee M18 double cuts for cutting sheet metal. Abrasive wheels **** for cutting sheet metal in my opinion.

LopezBart · Sunday at 12:42 AM

I have one of the Horror Freight 120V double cut shears; it didn't like cutting over the bumps in R panels, but it works pretty well on regular sheet metal.

T444e · Sunday at 12:53 AM

I've only cut trim coil and light gauge sheet metal with mine so far. About a month ago I cut 16 gauge with angle grinder and I wished I had my double cuts (out of state and needed to reinforce our inexpensive spoiler), it sucked. Sometimes you have to use what's available.

DennisVog · Sunday at 10:50 AM

readhead said:
Cut off wheels can leave inclusions in the weld field.

This is a very interesting insight. A lot of people restoring cars use cut off wheels to remove rusting material. I wonder if this cause issues when TIG welding the replacement panel in. I hadn't heard this come up before.

DennisVog · Sunday at 10:54 AM

KwikFab said:
Edit: Added a pic of a cut out (hitch) where I used that mini tool on 3/16" without issue. People saying they can't reliably cut steel sheet/plate are doing it wrong.

Well, this is kinda the crux of my question. Can you educate me on how to do it right? I'm using the guard and only exposing enough of the wheel to clear the material and a few mm more. Which I think addresses the issue @Yankeefarmer raised.

Seems counterintuitive, but perhaps it's designed for plate but not thin sheet metal (18-20 gauge).

KwikFab · Sunday at 11:00 AM

DennisVog said:
Well, this is kinda the crux of my question. Can you educate me on how to do it right? I'm using the guard and only exposing enough of the wheel to clear the material and a few mm more. Which I think addresses the issue @Yankeefarmer raised.

Seems counterintuitive, but perhaps it's designed for plate but not thin sheet metal (18-20 gauge).

The guard I've never removed, but what do you mean by "only exposing enough of the wheel?"

And no it works well for thin plate too, I only mentioned the thick stuff as an example of its capabilities.

While I do have CNC plasma at hand, and a hand torch, I'll still grab my cut off tool to prevent from having to fire up my air compressor and more.

My friend liked it so much he's borrowing it.

DennisVog · Sunday at 12:09 PM

KwikFab said:
The guard I've never removed, but what do you mean by "only exposing enough of the wheel?"

I'm referring to what the manual calls "depth of cut". How far below the thickness of the work material the cutting wheel sticks out. My understanding is less is better, so that there is less surface area of the cutting wheel exposed to potentially bind.

As far as I can tell, there is not a way to adjust the side angle of the cutting wheel if you're holding the guard flat against the work material.

Rusted Nut · Sunday at 12:19 PM

I have a pretty good selection of Milwaukee tools, and I'm a big fan. I like all of them except the 3" cut-off tool. I bought one for work, it sucked. Very under powerd, even with largest M12 battery. Other tools are much better.

readhead · Sunday at 12:41 PM

For average repair work using a cut off wheel would not be a problem but you said you were making coupons and for NDT you could have a problem.

DennisVog · Sunday at 12:47 PM

readhead said:
For average repair work using a cut off wheel would not be a problem but you said you were making coupons and for NDT you could have a problem.

Maybe I'm confusing terminology. I assume NDT you're referring to is non-destructive test.

My "coupons" are for either my personal welding practice or patch panels. I'm restoring a car and am cutting down 2 x 4' sheets to something smaller like 3 x 6". There is no formal certification or qualification involved. I am attempting to do 24" long cuts in thin mild steel sheet metal.

Doesn't seem like this task should be this complicated. I bought a tool that I thought was designed for this specific task. My exerience with it has sucked. I just want to know if my tool or technique are to blame for my disappointing results.

readhead · Sunday at 1:05 PM

Okay, confusion sorted. I use a 4 1/2” grinder with a thin cut off blade. I have not used the tool you mentioned so I can’t speak to how it works.

PugetDude · Sunday at 10:19 PM

Jgaz said:
I’m solidly in the M12 camp for a number of tools but when I was looking to buy this tool I asked @PugetDude for advice.

After discussing my intended usage with him I purchased the Ryobi 18 volt.
I’m not a fabricator but I’ve been very satisfied with my Ryobi.
Since I’m already invested in their battery platform it made the decision even easier.

I cut metal much the same way as @PugetDude described above. But the Ryobi was worth the price for me. (Check out Direct Tools often)

Used mine today, as a matter of fact...slotting the end of some 2" .065 wall square tube to meet up with the hole saw cut...perfect tool for the job.

KwikFab · Sunday at 11:22 PM

DennisVog said:
I'm referring to what the manual calls "depth of cut". How far below the thickness of the work material the cutting wheel sticks out. My understanding is less is better, so that there is less surface area of the cutting wheel exposed to potentially bind.

As far as I can tell, there is not a way to adjust the side angle of the cutting wheel if you're holding the guard flat against the work material.

Picture? They say more than a thousand words.

mm08822 · Sunday at 11:37 PM

How big are the coupons/shape you need?

What is the size of the sheet metal you are cutting them from?

How many? One time or many repeats?

Precision of cuts/edge quality required?

mike93lx · Monday at 7:35 AM

It isn't a powerhouse, but I find it useful when I keep my expectations reasonable. Any real cutting requires bigger batteries. If you are running 1.5 or 2's, that's part of your problem

Yankeefarmer · Monday at 7:59 AM

Can you attach a picture of how you’re holding the tool to the sheet when cutting? If I were attempting what you describe, no portion of the guard would be even close to the panel when cutting. I’d be holding the tool with the bottom of the guard roughly parallel with the panel.

All that said, I wouldn’t be grabbing the M12 for a 24” long cut. For that, I’d be using the corded angle grinder with adjustable guard and a guide bar as pictured. Unfortunately, I couldn’t find that guard on the HF web site.

For panels small enough to handle, I prefer a throat less shear.

PugetDude · Monday at 9:21 AM

I removed the guide assembly from my M12 cutoff tool, I find it's easier to control l the depth of cut and lift up a bit when I sense it bogging down. The guard stays in place, but the guide was cumbersome and inhibited the "feel" of the cutting process., IMO.
YMMV.

pancholasvegas · Monday at 9:25 AM

For what it is worth, when you're cutting sheet metal, I find it better to have the sheet being cut pretty well supported and rigid. It works well for cutting panels while they're affixed to the car because they have strength being attached. If you're cutting panels on the table or bench, you'll need to have it as secure as it would be affixed to an object or it'll bounce around and bind up the blade. Also - I like the thinnest cut off blades that I can get for sheet steel.

txvwnut · Monday at 11:46 AM

^^^^ What he said ^^^^ support both sides of the sheet on a piece of foam board insulation and I bet your cutting experience will improve.

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