Screw advance box joint jig plans

These are the free plans for version 1 of my Screw advance box joint jig

You can also buy plans for the improved version 2 of this jig.
Version 2 is an improved design that eliminates the need for a separate gear mounting block for each gear.
The version 2 plans also come with template for gear sizes up to 48 teeth, a printer optimized version, detailed building instructions, and many photos of the construction.

Carriage plans

Base plans

Gearing

You can also download the SketchUp CAD model for this jig.

I also have improved plans for version 2 of this jig for sale.