Western and Japanese kerf
Photograph: Plamen Petkov
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Kerf Wars

A kerf is the narrow gully made by a saw's teeth as they chew their way through wood. As you can see, Japanese blades produce much narrower kerfs than ordinary Western-style saws do, thanks to blades that are a mere .02 inch thick—that's about half the thickness of Western-style blades—and teeth that have less “set,” or sideways splay.
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