In 2013, a major refinery was experiencing serious pump
problems. The refinery had a massive thrust-bearing failure on
a critical 3,560-rpm pump. The pump was designed and
manufactured by a well-known company. It used two oil-mist
lubricated 75-mm/40° angular-contact-thrust bearings that
were arranged back-to-back. Each of these bearings had massive
bronze cages, which were in compliance with the present API-610
standard for centrifugal pumps.