Wind turbine gearboxes are subjected to a wide variety of operating conditions, some of which may push the
bearings beyond their limits. Damage may be done to the bearings, resulting in a specific premature failure mode
known as white etching cracks (WEC), sometimes called brittle, short-life, early, abnormal or white structured flaking
(WSF). Measures to make the bearings more robust in these operating conditions are discussed in this article.
