Engine Crankshaft: Crank Grinding
One crankshaft manufacturer tested some shafts that were ground down to .010˝, .020˝, .030" or even .040" undersize and found that there was less than a 4% reduction in the fatigue life of the undersize shafts. Most crankshafts are engineered to be about four times stronger than required, based on mathematical stress and load …
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