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Marine Biodegradable stern tube oils for longer service life and reduced lubricant consumption

Klüber Lubrication, a worldwide manufacturer of specialty lubricants, has introduced Klüberbio RM 2, a series of biodegradable synthetic stern tube oils for the lubrication of propeller bushes and shaft seals in fixed-pitch and controllable-pitch propellers.

Even small amounts of oil leakage through propeller water-side seals caused by operational wear, accidents or incorrect operation can result in a high environmental impact when mineral oil-based lubricants are used. Containing more than 90 percent of renewable raw materials, Klüberbio RM 2 oils are biodegradable and non-toxic to marine organisms. They bear the European Ecolabel and comply with the requirements of 2013 Vessel General Permit issued by the U.S. Environmental Protection Agency.

“These new stern tube oils provide good resistance to oxidation and hydrolysis, as well as thermal stability,” says Ben Bryant, marine market manager for Klüber Lubrication NA LP. “This results in extended oil service life and reduced lubricant consumption and disposal costs.”

Klüberbio RM 2 oils are approved by leading propeller shaft seal manufacturers, and offer ideal viscosity-temperature behavior, which facilitates start-up of propellers at low temperatures. It forms a thick lubricating film at elevated temperatures ensuring good wear protection. Klüberbio RM 2 oils are miscible with stern tube oils based on mineral oil, so easy changeover is possible.

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