Quote:
Originally Posted by Bob Bidonde
Axle failures like yours are not rare occurrences. This type of failure is the result of fatigue and a stress riser. The photo here is a textbook classic of how a fatigue crack initiates at a stress riser and grows to become a static overload.
The stress riser is at the end of the axle's key slot where the taper begins. Note how the crack grew outward across the section of the axle.
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I have some axle shafts that are in nice shape except for an annular groove worn into the shaft where it rides in the seal inside the housing. Is this a potential site for breakage or not a concern (aside from oil leagake)?