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Mobil Stern Tube Lubricant、美孚斯特恩地铁润滑油详细说明 (浏览612次)

Mobil Stern Tube Lubricant

Product Description

Mobil Stern Tube Lubricant is a high performance, high viscosity lubricant developed especially for the lubrication of Cedervall-type stern tube bearings used in ships and for certain bearings of ships' fin stabilizers. Mobil Stern Tube Lubricant is formulated from relatively high Viscosity Index (VI) base oils combined with emulsifiers, structure modifiers, surface active agents and corrosion preventives. It emulsifies readily with seawater to form a stable water-in-oil emulsion that is adhesive and an excellent lubricant. It provides effective rust protection in the presence of seawater and the lubricating film is resistant to water washing so that corrosion protection is maintained for extended periods under severe operating conditions.

Where the propeller shaft passes through the hull of a ship, it is supported by a bearing that is housed in the stern tube. Three distinct types of bearings are employed in this application: 1) The lignum vitae bearing, which has a stuffing box on the inboard side and no seal on the outboard side, is lubricated by seawater. The stuffing box may be lubricated with grease or oil, if this is deemed necessary. 2) Bronze or white metal bearings having oil-tight rubber seals on the inboard and outboard ends normally are filled with a lubricating oil that readily separates from water. Turbine oils, engine oils or hydraulic oils of the required viscosity generally are recommended. 3) The Cedervall type, which is a bronze or white metal bearing having an oil-tight inboard seal or stuffing box and metallic outboard seal that is not fully oil-tight, requires a lubricant that readily emulsifies with water. Mobil Stern Tube Lubricant has been formulated to meet this need. With the Cedervall type bearing a high viscosity lubricant generally is supplied to the bearing from a gravity tank located above the waterline so that the lubricant is under sufficient pressure to help exclude water from the bearing.

A recent development in ship stabilizers is the Denny-Brown-AEG stabilizer developed jointly by Brown Brothers and Co. Ltd, William Denny and Brothers Ltd., AEG, and Deutsche Weft. In these newer designs, the fins are mounted on trunnion bearings which permit them to be folded forward into storage boxes in the hull of the ship when not in use. A fixed shaft extends from the crux trunnion and the fin is mounted on this shaft on two bearings, which permit the fin to be tilted by a hydraulic mechanism to provide the righting movement to reduce roll of the ship. The interior of the fin and the fin bearings are lubricated by gravity from a header tank located above the waterline and the crux trunnion bearings are lubricated by pressure feed from a lubricator pump.


Features and Benefits

The requirements for lubrication of these three sets of bearings in the stabilizers and stern tubes are sufficiently similar so that a single, carefully formulated lubricant can be used for all of them. To perform satisfactorily, however, the lubricant must have the correct viscosity to flow properly under gravity head without excessive rapid flow that would result in high consumption; must minimize wear under the heavy loads encountered in the bearings; must protect the bearings and other components from corrosion and must emulsify with any seawater that passes the seals in order to maintain lubricating characteristics and minimize corrosion.

In stern tube applications, consumption of the lubricant is a major concern, both from the standpoint of the cost of the lubricant and the cost of labor required to fill the tanks. In two ship trials conducted over an extended period, Mobil Stern tube Lubricant gave significantly reduced consumption compared to the previous formulation, and at least as low as the best competitive product. Throughout the tests, lubrication was entirely satisfactory. These results indicate that Mobil Stern Tube Lubricant provides effective and low cost lubrication of stern tube bearings.

Key features and potential benefits include:

Features Advantages and Potential Benefits
Selected viscometrics Effective lubrication of critical stabilizer and stern tube components
Good emulsification properties Emulsifies readily to maintain lubrication in the presence of seawater
Excellent rust and corrosion properties Protects critical bearing surfaces exposed to seawater
Multi-use capability Reduces the number of lubricants required on-board
Good viscosity retention in severe applications Effective leakage control and reduced oil consumption



Mobil Stern Tube Lubricant is recommended for the lubrication of Cedervall-type stern tube bearings on ships where a high viscosity, readily-emulsifying lubricant is recommended by the manufacturer. It is also recommended for the lubrication of fin tilting bearings, as well as the crux trunnion bearings of Denny-Brown-AEG ship stabilizers and is approved by the manufacturer for use in these applications.


Specifications and Approvals

Mobil Stern Tube Lubricant has the following builder approvals  
Brown Brothers and Company, Ltd.  
William Denny and Brothers Ltd.  
Deutsche Weft  


Typical Properties

cSt @ 40?C 385
cSt @ 100?C 24
Viscosity Index, ASTM D 2270 82
Pour Point, ?C, max, ASTM D 97 10
Flash Point, ?C, min, ASTM D 92 246
Density @15?C kg/l, ASMT D 4052 0.915
API Gravity 23.1
Rust Test-Seawater, ASTM D 1401 Pass
Timken Salt Water Corrosion Test Pass
Emulsion Test, ASTM D 1401  
Emulsion @ 60 min, ml 60
Emulsion characteristics Thick and Stable


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application, following the recommendations provided in the Material Safety Data Sheet (MSDS). MSDSs are available upon request through your sales contract office, or via the Internet on http://exxonmobil.com. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.

The ExxonMobil logotype, and Mobil are trademarks of ExxonMobil Corporation, or one of its subsidiaries. 


Copyright ? 2001-2013 Exxon Mobil Corporation. All rights reserved.






最近的一个发展在船舶稳定剂是由布朗兄弟有限公司,威廉Denny和兄弟公司,AEG公司和德意志纬共同开发丹尼 - 布朗AEG稳定。在这些新的设计中,散热片安装在耳轴轴承允许其被向前折叠到存储盒在不使用时,船只船体。一个固定的轴延伸的症结耳散热片安装在此轴的两个轴承,允许鳍由液压的机制提供扶正运动,减少侧倾的船舶倾斜。通过重力在水线之上的症结耳轴的轴承的润滑的润滑剂泵的压送从位于从上水箱的散热片和散热片的内部的轴承进行润滑。






特点 优点及潜在效益
选择粘度 关键的稳定和有效的润滑艉管部件
良好的乳化性能 乳化随时保持润滑海水的存在
具有优良的防锈和防腐性能 保护关键轴承表面暴露于海水
多用功能 板上的所需润滑剂的数量减少
良好的粘度保持在严重的应用程序 有效的泄漏控制和减少石油消耗



美孚建议其中高粘度,易乳化润滑剂制造商所建议的船舶的Cedervall型艉管轴承的润滑艉轴润滑油。此外,还建议鳍状物的轴承,以及丹尼 - 布朗AEG船稳定剂的症结耳轴轴承的润滑和批准由制造商在这些应用中使用。






CST @ 40?C 385
CST @ 100℃ 24
粘度指数,ASTM D 2270 82
倾点,?C,ASTM D 97,最大 10
闪点,?C,ASTM D 92分钟, 246
密度@ 15?C公斤/升,ASMT D 4052 0.915
API比重 23.1
防锈测试海水,ASTM D 1401 通过
铁姆肯咸水腐蚀试验 通过
乳液测试,ASTM D 1401  
乳液@ 60分钟,毫升 60
乳化特性 厚和稳定








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