Customer reference Mineral industry SKF sealed spherical roller bearing SKF sealed spherical roller bearings increase service life by 100% A lignite mine operator achieves over 100% increase in bearing service life with SKF sealed spherical roller bearings. RWE, an open-cast mine operator in Ger- many, mines lignite (coal) estimated to be 30 million years old. The mine runs around the clock, 365 days a year, extracting 600 million tons o

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