|Project by Junado||posted 03-05-2014 09:21 PM||3522 views||26 times favorited||23 comments|
So I’m about to dive into a coffee table project for my brother. He just bought his first house and could use a home warming gift. The thing is, I’ve made mortise the normal way (miter gauge and dado stack), but I was dying for more accuracy and repeatability. My (small) table saw is finnicky with heigh adjustment, there is a bit of backlash in the adjustment screw and it made it hard to get accurate tenons. Plus, with stock of various width, I kept having to readjust my blade.
No more ! I bought these quick set tenon jig plans from Matthias Wandel (I have bought and built the 16” bandsaw as well, but this project is for another day) at woodgears.ca and let me say this thing is fabulous. I’m a mechanical engineer by trade and I like accuracy and being able to work with machines that give accurate readouts. This jig does one thing, but it does it well and quickly.
Basically, you use the dial indicator as a measure of the displacement of the jig/piece of wood, which allows accuracy to the thousandths of an inch for the width of the shoulders and the width of the tenon. You use the lever upfront to move the carriage that holds the piece of wood and setup stops for each cut. I’ve used the jig to make a few test cuts so far and usually end up within 0.001-0.003” of the target value, so I am very pleased. It has a movement range of about 2 1/2”, so it should be plenty for any regular sized stock.
I’ve painted the plywood parts and the rest of the jig is made with scraps of cherry, finished with water based polyurethane and wax on the moving parts.