Time to crack on making the mock-up frame on the jig! For now, it will just be a few tubes of ERW steel tacked together, as its inevitable that things will need to be altered as the design progresses.
Headtube machined out of 3" tube, with aluminum cups either end to hold the bearing races. The finalised headtube will have pinch bolts to clamp the aluminum cups in place.
Got the old mandrel bender back in action. Having decided to use 1" 3/8 tubing, we needed to machine up some new formers to fit the tubing.
The first few bends. Trying different angle to see what fits the design best. The CAD model says one angle, but things look different on the jig in front of you!
You can see a few kinks beginning to form on the inside. Thanks to some advice by an experienced tube bender, the technique has been dialed. There's defiantly an art to this tube bending business!
This is the stage it was left at tonight. The main structural pieces are bent and positioned, so now just a case of adding the smaller diameter cross braces.
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