Burn metal hot enough and you can do whatever the hell you want with it. Hereâ€™s a glimpse of how a coil spring, which is used in a carâ€™s suspension, gets made. Itâ€™s interesting that even though the machines do most of the work in shaping the spiral, there are still a lot of hands involved in transforming the rod into the final spring. Imagine accidentally dropping it on your foot.
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