Knapp Joint Drawer

Instructions

These joints are extremely strong and a nice alternative to dovetail or box joints. I have included a copy of a 4" box corner for you to modify for your application. I also included a drawing of the drawer that I built. There are 2 svg files included, one for the end of the fronts, and one for the end of the sides. Note the drawing shows a 3/16" extension of the front and back of the box that needs to be calculated into the actual size of the side. (Subtract 3/8" from the actual measurement of the side of the box from the overall dimension of the side svg.) The spacing of the design allows for using a 1/4" end mill for all the cuts. Since the holes for the pins are exactly 1/4", you cannot add an offset for clearance, but I found that my cuts were spot on with no offsets required. You should use a caliper for the exact thickness of the sides to determine the depth of cut on the front. I recommend adding a .005-.010" depth to have the drawer front proud of the sides. I cut a groove in the bottom inside of each of the sides to insert a plywood bottom. I used a router table, but you could certainly use Shaper for that cut too. You could even add the groove to the sides before exporting the svg. I used a stopped dado cut so the groove does show from the outside. Position the bottom of the groove about 3/16 from the bottom of the drawer and most of the groove will clear the bottom pin anyway.