frame jig

[hardtail69]

Yes there are many jigs for frame building out there, but I thought I might add mine and get some reaction. This jig was made with versatility in mind, since we build drift trikes now, but we may also be building motorized bicycles and perhaps eventually motorcycles as well. (Though we will probably just build them for our own use.) The frame consists of just 2x3 and 2x2 inch square tubing. The only real innovation we came up with is the use of what I call saddles, or wings as my son calls them. The reason we think that they are cool is we can slide them anywhere along the back bone of the jig and have a level, flat, and square surface, where ever we want one, for support or clamping. The wings have a piece of 2x2 tubing that is welded on, and that sits between the double back bone and we simply clamp it from the bottom, where ever we want it. The top of the saddle is made from 3/8 x 6 inch steel and in our case we made them three feet wide. Just carefully weld the center tube on the saddle so everything is flat, square, and true. The feet are just 2.5 inch by 1/2 inch bolts that fit into the nuts we welded on the bottoms of the 2x2 square tubing that are 21 inches wide. I hope this helps anyone thinking of building a frame jig. By the way, we bought the head tube part with the cones as we still do not have a lathe. Once we sell a few more drift trikes....well.... I have plans! Muahahahah