Bridge City Tools: TenonMaker TM-1 #2: Kerfmaker Shop Made JIG

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Blog entry by HappyHowie posted 10-23-2016 01:16 AM 2646 reads 1 time favorited 2 comments Add to Favorites Watch
« Part 1: My New TenonMaker TM-1 Part 2 of Bridge City Tools: TenonMaker TM-1 series no next part

Since Bridge City Tool Works do not have their KM-1 Kerfmaker in stock and they are without any indication if they will be making others, I have decided to make a similar jig in my shop.

I have just a few more steps to complete this kerfmaker jig.

1) cut 1 inch off the top piece and glue it one end of the bottom piece.

2) With the top and bottom pieces fitted together drill a hole through both piece centered on their width and 1 1/2 inches away from the glued end. This hole will fit a #10 machine screw as shown in attached photo. Counterbore the underside so the machine screws head will be flush or buried enough so it won’t be proud of the bottom’s surface.

3) Either with a small flush router bit or with a 3/16” drill bit in the drill press , cut a channel 2 to 2 1/2 inches long along the center of the top piece. With the machine screw through the bottom part’s hole and through the top piece’s channel, the top piece can be moved the distance of the channel.

4) With the top channel piece butted up against the glued down end block, cut the opposite end of the jig at the tabke saw so its two pieces are flush to each other.

5) Now also with the top channel piece butt up against the glued end block cut a saw kerf with my table saw’s Freud RIP blade along the seam where the top channel piece touches the glued top end block. Make this cut so the saw blade cut a portion of the top channel piece and the glued end block. This cut will define the saw blade’s kerf, the thickness of the saw blade.

These steps will complete the construction of the Kerfmaker jig.

Other jigs could be made for my three different bandsaw blades and for the combination blade and my crosscut blade that I also use on my table saw.

Tomorrow I will flush cut both ends of these jigs. Then I will cut my Freud blade’s kerf through the seam where the glued block touches the channeled top piece.. The jigs should then be completed and ready for use.

-- --- Happy Howie

2 comments so far

View Rich's profile


5130 posts in 1191 days

#1 posted 10-24-2016 01:56 PM

When I read about the two jigs, I started thinking they would be easy shop made items too. Your post provides a great starting point.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

View HappyHowie's profile


473 posts in 2546 days

#2 posted 11-17-2016 05:03 AM

Bridge City Tools has made this product available for pre-order. I have placed my order for one.

-- --- Happy Howie

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