|Project by treeman||posted 07-26-2009 12:55 PM||42947 views||344 times favorited||121 comments|
If you are like most woodworkers when you make a groove or a dado, you will sneak up on the correct fit through trial and error. This was my standard procedure until I found the Bridge City Kerfmaker.
This item intrigued me so much that I thought I would order one until I saw the price. For many people price will not be an issue but for me, well, I need to watch my budget. I decided that I would attempt to make my own and the pictures you see are the result.
My version is made out of 3/4” Sapele cutoffs I had laying around. It measures 4” long by 1 3/8” tall. This is an ingeniously simple device that removes the trial and error process from fitting dados to the material that fits into them. Basically, you set up the kerf width of your cutter and the material thickness on the Kerfmaker and then make your cuts. The result is a perfectly sized dado with no tweaking.
The last picture is my first test cut using the device. There was no trial and error or tweaking involved. The first try was perfect. This cut was made on my table saw using a standard 1/8” cutoff blade. The cut was made in three passes; the first two established the width of the groove with the last pass cleaning up the middle.
To see how this actually works click the above link and watch the video at the bottom of the page.