IRWIN Tools Metal-Cutting Circular Saw Blade, 10-inch, 80T (4935561)

This is a good quality blade. Cuts steel fence posts quick and easy. Keep in mind that this is not for use on a miter saw. Max rpm for this blade is 1800 and most miter saws are are over 3000 rpm. If you use this on a miter saw it will dull very quick.

Perfect

This blade is NOT designed for miter saws. Most miter saws run at 3000+ RPM and this blade is designed for about half that (1800 RPM or thereabouts). I'm sure Irwin states it in the fine print, but just in case you missed it, DON'T put it on your miter saw.Having said that, I put it on my miter saw. On purpose. Even though I knew its limitations. Why? A few reasons:1-- I was only going to use it to cut thin-wall stuff-- EMT tubing, copper pipe, other odds and ends. Even at miter saw speeds, this blade will last a long time cutting thin mild steel and copper2-- It was around $35 when I bought it (almost double that now). I wouldn't be out much money if it went belly-up.3-- I was curious to try it. What better way to find out than to F around?Having said that, I have used it sorta successfully once or twice to cut angle iron on the miter saw. I didn't chip any carbide teeth (though I'm sure I will if I keep doing that) but it didn't cut very well, either. At those speeds it just can't take enough of a bite out of the material, so you get heat, sparks, and very gradual progress. I halted that experiment quite quickly.I can also tell you that it won't cut wood, as I found out when I forgot to change the blade out and attempted to cross-cut a 2x4. Again, lots of smoke and not much forward progress. I won't be doing that again, either.This blade would probably do really well on a slow-speed chop saw. It will tolerate (for a while, anyway) high-speed operation if you're cutting thin material, and the cut quality will be better than an angle grinder. At the price I paid, it was worth it just to keep around for when I have to make lots of repetitive cuts on thin stuff, copper pipe, etc.Would I buy it again? Not at the current price, but I also don't have a need for it. I WOULD buy it if I had a slow-speed saw and could legitimately use it to its full potential. Plus, I got to experiment, which is fun.

First cut was fabulous! But it was all downhill even before that.First, I was skeptical about using this on the Rage3 because the blade's listed RPM was 1800.But figured that I'd limit my cutting to 16ga square steel tube. Light feed pressure, use carefully.Next, it didn't fit! Hole too small for the saw's shaft. Had to run a diamond burr around the hole a dozen times.That worked, prefect tight fit. First few cuts were the smoothest of any new blade I've used.Cut single tubes fine. Then it got "wobbly" going thru the double wall when I cut two tubes together.(Seems every project has at least dozens of parts. Can't just cut one tube at a time.)Got worse quickly. Wobbly then bumpy. Then showers of sparks! The end is near!Regular dry saw users know the signs!Lasted a day. Less than 100 cuts thru 16ga 1/2" square steel tube "fence pickets".Based on the first cut, the blade might have been perfect for a 1200 rpm saw.However, the increase in wear cutting 2 or more tubes together makes me wonder what exactly this blade is good for.

I used this to cut hollow balusters at my house. This was installed on a table saw designed for trim. It cut through the metal with ease. Very clean cut. No burs or anything like that. I am a DIY guy and this made it very easy for me to do this job.

Lowering my review on this product. The blade recently shed three teeth, ripping the .125 angle steel stock out of it's clamp and flinging it into my left hand about 18" away (hospital visit required). Up until this point it had performed flawlessly. Blade was being used at 400rpm below its rated maximum speed. Blade exhibited no abnormal signs of wear or failure up until this point, no heat marking, all cuts previously perfectly smooth. Only reason I only reduced it to 3 stars is because of its performance up until it's catastrophic failure. Won't know how much permanent damage was done to my index and middle finger until after things heal up.(Initial review follows)Goes through .120 wall DOM mild steel tubing like butter. Had to find a saw that spun at less than 3600RPM, but once I did, doing automotive frame fabrication became much easier and much more accurate. I am using this in a miter/bevel saw Makita LS1016L 10-Inch Dual Slide Compound Miter Saw with Laser and it works fantastic! I don't know what its lifetime will be like, but so far, it does not appear to be dulling after cutting perhaps 80-100 linear feet of .120 thick mild steel and around 15 feet of .250 thick mild steel plate.

I used this blade to cut flat steel bars that were 1/8 inch thick. No problem at all. I also used it to cut flat aluminum bars that were 1/8 inch thick. It was a piece of cake. It cut through the aluminum like a framing blade cuts through wood. Like buttuh.

I am quite amazed by this blade. I'm not sure how long it will last but I've been able to cut the angle iron from an old bed-frame, random pieces of 11 gauge steel, and some square tubing. I had upgraded my miter saw to 12 inch a few years ago and had an old 10-inch miter saw sitting around. The old one is now set up with this blade and serves as the metal cutting saw. I will be ordering this one again.