HF 7-1/2" Metal Cutting Saw Blade
Short story - thumbs up for the blade. Now the rest of the story:
I've heard good and bad things about cutting metal with the HF cold metal cutting blade and a regular wood cutting circular saw. Well, I have an old saw I picked up at a yard sale quite some time ago for $3 and I bought the HF 7-1/2" Metal Cutting blade for $17.99 less 20% with coupon,
My test project was a piece of 8" pipe that is the vertical support for my grinder. The pipe is welded to a truck rim and is as solid as can be because the pipe is about 1/4" thick.
The big truck rim wasn't very easy to move around the shop so I put it on a barrel dolly with 5" wheels. This made it too high for easy use of the grinder. But, it sure makes it easy to move around the shop.
I wonder how it would do with half inch material. I have a 4 way wedge that I would like to cut down.
Now I need to cut about 5" off of the pipe. The stand is awkward so the circular saw with the new cold cutting metal saw blade gets a chance to show it's stuff. The stand wouldn't fit across my 4 X 6 metal cutting horizontal bandsaw, would be awkward to use my metal chop saw and I have a hard time getting a nice straight cut with a recip saw. I don't have a plasma cutter (yet) and I don't know how to use my O/A torch. No way was I going to use a hacksaw.
The first picture shows the saw and blade after it has started to cut the pipe. The second picture shows a nickel on top of the cut pipe edge leaning against a welding magnet (with metal dust and a paper staple), to show the scale of nickel to pipe thickness.
It didn't cut like a knife going through hot butter but it sure was easy to cut by going slowly, keeping the blade on the line (for the most part) and being patient. It took a few minutes but the cut was smooth, and cool to the touch as soon as I finished cutting. The saw didn't get hot and there were few sparks as it cut. This saw didn't capture the metal chips like the purpose built saws do, but the chips were mostly contained at the saw exhaust and made a pile on the floor under the cut. I wore a full clear face shield but didn't feel or hear any chips hit the shield. There were no carbide teeth mixed in with the chips, all were still connected to the saw blade.
I am impressed with the cutting ability of the blade. The purpose built metal cutting circular saws turn about 3600 rpm. My saw is 5400 rpm as compared to most saws 5800 rpm. The blade is rated for 5800 rpm. I have another saw that is 4900 rpm that needs a brush in the motor that I will try after I install the brush.
Conclusion: The metal cutting blade doesn't suck.
Clem