Increase in stern tube bearing failures leads to new EAL testing

摘要

Over the past few years, there has been an increase in reports of stern tube bearing failures and a perception that environmentally acceptable lubricants (EALs) may be to blame. While the uptick coincides with the increased use of EALs due to 2013 regulations requiring them in all ships sailing in U.S. waters, classification society DNV GL says changes in vessel operation and design — as well as changes in the design of propulsion systems — complicate the situation.