Physics of lathe

Some of the energy will be stored as internal stress in the chips. This is potential energy which can later be released. On a larger scale, machining CR steel or aluminum extrusions can relieve some of the stress, creating an imbalance and subsequent warping of the machined part.

I don't recall that anyone mentioned sound energy either. At least in some of my machining, it seems like that may be a major issue.:rolleyes:
 
Bill has brought a really good question. In high school machine shop, I had to turn a cylinder to a certain diameter. I immediately measured it with a micrometer. It was right on, or so I thought. Took it to the instructor and he refuse to measure it because it was too hot. Imagine to my surprise after it cooled the part was under sized.
 
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