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Shimano Deore Hollowtech II Spindle Split

From http://chroniclesofthevoyager.blogspot.com/2012/11/bike-tech-shimano-deore-xt-crank-review.html as of 2013/08/24:

           

Posted 2012/11; Shimano "Deore" model cranks, about two years service, history otherwise unknown.

Failure noticed as sudden "crack" sound. No injury reported.

It appears the spindle split from one the inboard edge of one bearing to the inboard edge of the other. Initiation point not known.

Compare to the spindle in http://pardo.net/bike/pic/fail-001/FAIL-184.html, which also has a long side-to-side split, though it appears the crack does not quite meet the bearing at either end.

See also FAIL-190.html.