What Does a Chipbreaker Do in a Hand Plane?

If you have ever wondered what the chipbreaker in your handplane REALLY does, Wilbur Pan at the Giant Cypress blog has just posted a video that answers this question.  The video was originally produced in Japanese by Professor Yasunori Kawai and Honorary Professor Chutaro Kato at Yamagata University, but Wilbur has worked to get the video’s dialog translated and subtitled so we English-speaking viewers can follow along.

As it turns out, the old craftsmen were right.  The chipbreaker really does contribute to the cutting action of the plane iron.

Take a look.

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