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I came across this blade recently:

enter image description here

It is an 8-tooth 10" blade.

Although I am familiar with the general principle that fewer teeth can be used for faster, rougher cuts this blade still seems a bit strange to me. Having only 8 teeth at this size seems especially rough, plus it has the very long arc sections between the teeth which seem like they would add some friction.

Although on the blade it says "cutting of framing materials, plywood..." I'm a little skeptical of that. For plywood in particular I thought that having a higher tooth count was generally recommended.

So, is this blade for some special purpose or circumstance?

Thanks

  • High tooth count for plywood and nicer veneers is recommended if you want to minimize tear-out. But this particular blade is intended for all purpose construction and the plywood they are talking about is construction grade or OSG exterior sheathing where no one cares about tear-out. Fast, all purpose construction blade when carbide was new and expensive. (as per the most recent answer.) The full tooth would leave plenty of relief for the tooth holder, which provide a lot of support for the tooth itself. – jdv Feb 26 at 17:51
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I think (??) that it was a early carbide blade as carbide was really expensive to make, I have seen similar in old Sears catalogs.

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