Quote:
Originally posted by Henry Schmidt
Crank shops repair the crank and during the repair process they have to straighten them. This is an interesting process. The crank grinder will locate the crank in centers and measure for the high spot, then with all the technology available to engine builders today, he takes a big hammer and a V shaped chisel and then just beat the hell out of it. The hope is the crank gets straight and does not crack. If this crank was repair because of a spun bearing, it is likely that it was pounded straight.
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Every machine shop that grinds and straightens cranks that I know of uses a crank bending press.
If your crank grinder uses a chisel I suggest finding another machine shop.