Larry Beuchley (web site is Beuchley Woodworking) has designed this incredibly useful jig for routing compound tenons and for routing mortises on pieces with compound angles.   My version of the jig uses track and bolts on the adjustable vertical face, but the original used maple runners like the ones on the top of the jig.  I think the maple runners are actually better since there is some slop in the track system (hindsight is 20/20).

To use the jig, cut wedges at the appropriate angles.  Cut a pair of wedges for easier clamping – in the photo above, the matching 66 degree wedge that would be affixed to the back of the sliding vertical support is not attached, but it was when the pieces were cut so that a parallel surface was available for clamping the work piece.

For a compound angle, attach another wedge to the back face of the jig (the vertical face with the hole in it for clamping).

The tenoning top shown is shorter than I would like.  I plan to re-make it so that it is as long as the mortising top (22″).

The tenoning top allows you to route the complete tenon because you route one end of the tenon then slide the top forward and route the other end of the tenon.

Students who take Beuchley’s router joinery class at Santa Fe Community College make this jig as part of their coursework.

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