Finger Joint Jig (13mm) v2

thingiverse

Update to my earlier 13mm finger joint jig: Jig for making 13 mm finger joints. This jig is my second prototype. It has screw holes that are sized and countersunk for 8g screws. It is designed for use with a 13mm straight bit and a guide bushing diameter of 17mm. See photos for set up/use. This version is designed to be modular. Longer join surfaces can be made by joining separate pieces together. Because of the thickness of the print and the fact that the bushing affects the depth to which the router can plunge this jig is limited in the thickness of material it can be used with. A 19mm cutting surface becomes about 8mm in my set up. I have not tested whether the modular section gives a proper finger join. I have added a piece of 3mm ply under the jig to indicate where the bit cuts. This could be removed to give a few extra mm. The plywood joined in the photo is 7mm thick. Designed in Freecad, printed in ABS.