Hew & Awe | Make your own Kerfing tool @HewAndAwe | Uploaded April 2020 | Updated October 2024, 1 hour ago.
Using a Kerfing tool to speed up cutting half blind/half lap dovetails was popularised by Tage Frid in 1979 in his book on Joinery.
Mr. Frid recommended using an old saw blade or cabinet scraper to aid in cleaning out the waste between half lap dovetail pins. But that can result in a nasty cut pulling it back out!

This Kerfing tool works by deepening the angled saw kerf in the area where the saw blade cannot reach. Start by sawing out the pins, being sure to cut to and not past your scribed lines. Drop the Kerfing Tool in the saw kerf, and gently strike the brass back with a wooden mallet to cut away the material remaining in the corner of the angled saw cut. Stop when you reach the bottom of your saw cut or scribed line. Take several small bites to prevent splitting the wood. Now you have a clean pin wall, and cleaning out the remaining waste between the pins will be much easier.

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Tools in this build (If you buy through these affiliate links it helps support my channel! Thank you!)
Callipers: amzn.to/3fh1DVE
STIHL GUIDE BAR LEVELLER
Lie-Nielsen Carbide Burnisher
Lie-Nielsen dovetail saw - amzn.to/2yWyONS
cabinet scraper Lie-Nielsen

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