|Project by kiefer||posted 05-07-2014 08:17 PM||4043 views||20 times favorited||18 comments|
This tennon jig is really not different that others of this type but by using two blades to cut both sides of the tennon in one operation makes it easier and saves time and eliminates the process of having to flip the work piece or resetting the jig for the second cut .
This is not a new idea as my uncle did this on a shaper some fifty years ago and I have read about this method in books .
The jig is constructed to slide on the fence with as little play as possible and a handle that keeps my hand well away from the blades . The work piece is held in place by a toggle clamp and aligned by the tall fence and a back stop which both have to be perfectly set a right angle to the saw table .
I use a 1/4 ” box joint blade to cut the dado first and then set up the two 7 1/4” blades with a spacer and shims in between to match the tennon to the dado .
I use the 7 /14” blades because of the low price and can set it up once to the perfect fit and put it away for the next time I need it .
After I cut all the dados I set up the blades for the tennon cutting and align the jig with the work piece clamped in place to the dado for the length of the tennon by using the dadoed work piece as a hight gage
and visualy align the tennon position
This is done without the saw running and unplugged from power (Safety First )
A couple of test cuts and the alignment is perfect .
The waste that remains is cut on my sled with a stop block .
Here is the result of the first test and it turned out very well nice and flush and square and now I can make the doors for my daughters bathroom cabinets .