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Rob Cosman's Sharpening Rule

Sharpening Rule
  • Sharpening Rule
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  • Sharpening Rule
  • Sharpening Rule
  • Sharpening Rule
  • Sharpening Rule

Rob Cosman's Sharpening Rule

100 reviews

Regular price $9.95 USD Sale

102 left in stock.
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Customer Reviews
KITs

The most innovative technique in plane sharpening over the last 30 years is the "ruler trick" by my good friend, David Charlesworth.

Traditionally, a sharp cutting edge is achieved by honing the back of your plane blade until it is dead flat (this takes a while), then you hone the primary bevel to achieve a razor sharp edge. 

David Charlesworth introduced his ruler trick to save significant time while still achieving a razor sharp edge.  Instead of flattening the whole blade back, he places a thin ruler on the stone raising up the blade about 1 degree so he just hones the leading edge, not the whole back.  David's "ruler trick" works great and I always use it.

You only need one thing - a small thin ruler.  We have our 8 inch long, .018 inch thick sharpening rules custom made without ruler etchings to allow plane blades to glide smoothly across the rule when executing the "ruler trick". 

Customer Reviews

Based on 67 reviews Write a review
Customer Reviews
4.9 Based on 100 Reviews
5 ★
97% 
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4 ★
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Filter Reviews:
JZ
09/04/2023
Jeffery Z.
United States United States

Sharpening Rule

Advertised as non-slip. It slips just a bit in actual use on Shapton's ceramic stones, but not nearly as much as a standard 6 inch steel rule. I like the extra length offered by this product, which makes it much easier to hold onto than the shorter length of a standard rule.

RS
09/02/2023
Ronald S.
United States United States

Super

That's a loaded question. I want to send Rob a pair of scissors to cut off that girley hair!!! Yes his stuff is great. I have adopted his Wood River 5 1/2 as my fave....

A
07/09/2023
Anonymous
United States United States

Sharpening Rule

Works as intended

PM
06/12/2023
Paul M.
United States United States

Rob Cosman's Sharpening Rule

Great product as always!

CD
06/11/2023
Christopher D.
United States United States

I mean . . . it's a thing metal ruler

I bought it for one purpose, and it serves that purpose in the most complete way. What else can I say?