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Understand Kerf and Measurement Errors

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Kerf

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What happens here

The video starts by posing a common problem in woodworking: a cut board being shorter than measured. The creator explains that this happens because the saw blade removes material with each cut. This removed material has a width, known as the 'kerf'. When a cut is made directly on a marked line, the material removed by the kerf makes the final piece shorter than intended.

Goal: Recognize why cuts can be inaccurate due to saw blade kerf

Tools and materials

  • Miter Saw Ridgid — Demonstrating the cutting process and the effect of kerf
  • Saw Blade Diablo — The component that removes material (kerf) during a cut
  • Wood Board — The material being cut to demonstrate kerf

What they say

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Why is this board shorter than I measured? Let's get after it. That's because your blade isn't infinitely thin. Every time you make a cut, your blade removes material. That width is called the kerf. So, when I mark 12 in, this line isn't where I want the center of my blade. This is the side I want to keep, and I put an X on the side I want to get rid of. Put the edge of my tooth on the waste side of the line. But, here's where things get interesting. Not every blade has the same kerf. Different

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