Kreg R3 Adjustable Jig

thingiverse

This jig is based off rocklobsters design https://www.thingiverse.com/thing:1621437 with several key modifications. I designed it from scratch in Fusion 360, incorporating some tweaks to rocklobsters original design to ensure the vice functions smoothly without the arm falling out when winding it back and supports the Kreg R3. I also added metric and imperial measurements as a guide for your R3 that match up with the ones on the side of the device. Parts list: * 3x M10 nuts * 1x 120mm M10 threaded rod * 2x Washers * 1x M3x25 or 30 mm screw * 1x M3 Washer * 1x M3 Wingnut Or, if you use the locknut method: * 1x M4x25 or 30 mm screw * 1x M4 Washer * 1x M4 Wingnut * 1x M4 Nylock Aluminum is required for the vice face and to mount the jig (not shown in my pictures as I'm waiting on it to arrive). To get the vice working, you'll need to create a notch at one end of the rod, as shown in the attached pictures. I used a lathe at work, but this can be done at home with a drill and a file - refer to http://www.hhhh.org/joeboy/resources/hotwire_foam_cutter/hotwire_foam_cutter.html under BASE heading for an example. Once notched, cut your washer or obtain a circlip and clip it onto the notch. This will prevent the rod from falling out and moving forward when adjusting the vice. For the turning knob, I welded the nut to the other end of the rod and then pushed on printed knob (tightly fitting so force was needed). This won't come loose as it's a very tight fit - but you could also add some glue if you prefer. If you don't have a welder, threadlock and/or a nylock will work. The Kreg M3 hole STL is provided to allow the bottom oval hole of the R3 for sliding the jig up and down and locking it into position. I created this because the tiny mount inside the R3 may break over time as there isn't much material there - so I printed this part a tad oversized, requiring some filling (depending on your printer). Then push it in to the hole I left fairly tight and use a hammer and screw to push the part into the R3 for a solid fit that won't dislodge.