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Many times I used a chisel to cut off a hard-to-reach piece of lumber, I was wishing I had an adequate blade for my 4.5" grinder, as I don't own an oscillating tool. Why is it hard to find? Is it because they would be dangerous?

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The other big question is if your grinder accepts the flat type or the curved type –  Steven Jan 3 '13 at 22:39
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up vote 5 down vote accepted

They are made, they look like mini chainsaws and are commonly used for carving bowls.

Lancelot and Discs

A common brand for these blades is Lancelot

You can also get smaller saw blades in the 4.5" form factor. I suggest you go to a saw store or woodworking shop. Here is a product on Amazon:

http://www.amazon.com/KwikTool-BB450-2-Inch-1-Inch-8-Inch/dp/B000O3IOEW/ref=sr_1_2?ie=UTF8&qid=1357252670&sr=8-2&keywords=angle+grinder+wood+blade

mini saw blade

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why would anyone call their product Bad Blade??? –  amphibient Jan 4 '13 at 17:44
    
The "bad blade" looks like an amputation waiting to happen. It's a circular saw blade but spinning at 10,000 RPM and with none of the characteristics of a circular saw that help keep it safe (retractable guard, a shoe to keep the blade aligned vertically). You couldn't pay me enough to use one of these blades in a grinder. –  Mike Powell Apr 16 '13 at 4:09
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The primary reason is grinders typically spin at 10,000 rpm. Wood cutting saws typically spin in the 3500 to 4000 rpm. If you spun a typical circular saw blade at 10,000 rpm it would come apart. As @Matthew PK has shown they make wheels for working wood with a grinder but they are not the typical toothed blades.

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