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Rob Cosman's Sharpening Rule 2.0

Rob Cosman's Sharpening Rule 2.0
  • Rob Cosman's Sharpening Rule 2.0
  • <iframe width="640" height="360" src="https://www.youtube.com/embed/i29-Wjwd1BY" title="" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
  • Rob Cosman's Sharpening Rule 2.0
  • Rob Cosman's Sharpening Rule 2.0
  • Rob Cosman's Sharpening Rule 2.0
  • Sharpening Rule
  • Rob Cosman's Sharpening Rule 2.0
  • Sharpening Rule

Rob Cosman's Sharpening Rule 2.0

Regular price $12.00 USD Sale

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Our ruler 2.0 is a significant improvement over our original sharpening ruler.  It now includes a small "hook" on one end so that it catches on the sharpening stone to help the ruler not slide around. 

The most innovative technique in plane sharpening over the last 35 years is the "ruler trick" by David Charlesworth. Traditionally, a sharp cutting edge is achieved by honing the back of your plane blade until it is dead flat (this takes hours), then you hone the primary bevel to achieve a razor sharp edge. 

David Charlesworth introduced his ruler trick to save significant time flattening the back while still achieving a razor sharp edge.  Instead of flattening the whole blade back, he placed a thin ruler on the stone raising up the blade about 1 degree, effectively flattening the blades' leading edge, not the whole back.  David's "ruler trick" works great.

Product Details:

  • Length: 10-1/2 inches (267mm)
  • Width: 1/2 inch (13mm)
  • Thickness: .020 inches (.05mm)
  • Hook: Sits down by .070 inch (1.5mm)
  • No ruler etchings so the blade freely slides back and forth.
  • Small hole at one end to hang the ruler.

Customer Reviews

Based on 2 reviews
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K
Kevin Elder
Great help and improvement

The hook and longer rule make it much easier to hold the rule to the stone. Very simple changes make all the difference in the world. Thanks RC!

R
Robert Eskridge
Excellent tool

Arrived quickly. I watched the video on how to use it. touched up all my plane irons with it. Really fast

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