Is there more than one​ thickness of cutoff wheel for a grinder? Every time I try to cut with mine, it never seems to want to cut sheet metal. I'm not sure what I'm doing wrong here. Any help would be extremely appreciated.

There are a few different thicknesses for cutoff wheels. I cut sheet with a 3" x 1/16". There are also 3/32" and 1/8" (and others) though I use the 1/8" as a mini wheel for getting at tubing joints.

If you are using a 4 1/2" (or bigger) wheel you might be getting some vibration or flex that may make it more difficult. If you've got a lower RPM grinder it may not spin up fast enough depending on what you are cutting and what wheel you are using.

Exactly what sort of issues are you having and what are you using?

My problem seems to be that it's not really cutting the metal, mostly just eating the disc down to nothing. I was using a drill attachment for a cut off wheel on a 1/2 in. drill.

Get the proper tool:
http://www.tooltopia.com/ingersoll-rand ... oCBJDw_wcB

The rpms on the drill are too slow. I use a tool similar to the one above and it will cut through sheet metal, bolts and a host of other things as well.

I use a cut off tool like the one in the post above but good alternative is a 4 1/2" electric angle grinder. Harbor Freight or Home Depot have cost effective models. If you are an occasional user the HF grinders are fine. I used a few of the HF models back in the day and they worked well until they gave up the ghost. Not as good as the Metabo models I use now but not nearly the price.

The advantage to the angle grinder over a cut off tool for most people is the versatility. You can change the media for a variety of tasks. The cut off wheel does one thing, it cuts. (though I use an 1/8" thick disc in a cut off to grind tubing joints) Don't use the wheels at HF. The angle grinder is OK but he media stinks. Get the wheels from the big box store or local industrial supply.

HF angle grinder http://www.harborfreight.com/4-12-in-43 ... 60625.html

Dewalt (I have a few of these) http://www.homedepot.com/p/DEWALT-7-Amp ... /203574137

Milwaukee http://www.homedepot.com/p/Milwaukee-7- ... /202101584

Metabo (this one kicks butt over the others) http://www.cpooutlets.com/metabo-601243 ... lt,pd.html

How about a little info on what you are trying to achieve. How precise do the cuts need to be?

His issue is using a drill motor. You'll need 3-4 times the RPM and more torque than a drill for the wheels to work properly. A drill is 1500-2800 RPM whereas an angle grinder is 9k to 12k and a cut off tool can be 20k or so.

I'm certainly not the smartest or most experienced guy on the forum ... by a long shot.

Here is a bit of info that was given to me by a friend that spent his entire life building Street Rods and Custom Bikes.

If you don't see sparks, you are not cutting

I have no idea if this will help you, but every time I use a die grinder I have this advice in the forefront of my focus and effort.

I know that for me too much pressure will reduce my cutting and burn the disc up.

Sadly, my friend is now deceased, but I owe him for a large portion of what little I do know.

I do agree though that trying to use a drill (low RPM) is most of your trouble there.

and always INSPECT your cutting wheel before each use for cracks. NEVER drop it or its dangerous junk. they can and will kill you