They talked about the physics of this on Car Talk one time. The theory being that it's hard to heat the stud or the piece that it's screwed in to,without heating the other part. In other words,you can't really heat one to get expansion without heating the other and that all heating really accomplishes in the long run is to loosen the rust or other particles bonding the two halves together.So if they remain nearly the same temp through the process,letting things cool until strength is returned to the stud is about the only goal.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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