- 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.
Specification and Approvals
Viscosity |
|
cSt @ 40ºC |
385 |
cSt @ 100ºC |
24 |
Viscosity Index, ASTM D 2270 |
82 |
Pour Point, ºC, max, ASTM D 97 |
10 |
Flash Point, ºC, min, ASTM D 92 |
246 |
Density @15ºC 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 |
Applications
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.