How To Accurately Bend Lines Story & Photos By Jim Clark (The Hot Rod MD)
Copper, aluminum and mild steel tubing is relatively easy to bend which allows for correcting some mistakes when you bend it in the wrong place. Stainless steel tubing is not so forgiving; when it is bent that is it. So you have to be more accurate when measuring and calculating each bend. Creating straight lines from one point to another or lines with a simple 90� bend are very easy to fabricate but most lines on a brake or fuel system have to snake around components on the vehicle before reaching their destination. Mocking it up with a soft length of copper wire creates a pretty good rough template as a guide. However, if you want a really professional looking job you have to calculate the angle for each bend and path that the line will take. The front brake crossover-line on my roadster seemed like a simple task but actually required multiple angles to route it cleanly along the backside of the front crossmember. A straight line across would have been 22-inches long with two 90� bends at each end. But there had to be a step in the center to form around the spring u-bolts and two compound angles traveling upward at 15� and to the rear 10�. To complicate it even more the ends bent downward at two different angles so that they could meet up with the fittings.
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