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Mobilgear SHC MT 68
ExxonMobil Marine, United States
Marine Thruster Gear Oil
Product Description
Mobilgear SHC MT 68, a premium performance, fully synthetic marine gear oil is designed to provide optimum equipment protection ａnd oil life even under extreme conditions. Polyalphaolefin (PAO) technology has been selected for its exceptional oxidation resistance ａnd thermal properties, naturally high viscosity index, excellent low temperature fluidity ａnd absence of undesirable compounds that are often found in mineral oils. The high viscosity index ａnd low traction coefficient of this oil combine to provide a potential reduction in power consumption in many gear drives. Mobilgear SHC MT 68 contains an advanced ａnd carefully blended proprietary additive system designed to provide excellent protection against conventional wear modes such as scuffing but also provides a high level of resistance against micropitting fatigue.
Mobilgear SHC MT 68 exceeds the industry requirement for bearing wear protection as measured by the industry standard FAG FE 8 test. Mobilgear SHC MT 68 ＇s balanced formulation is able to provide maximum wear ａnd corrosion protection while maintaining compatibility with industry standard gearbox seal materials. In addition, compared to conventional gear oil chemistries, it offers the potential for improved lubrication of gearbox rolling element bearings. Mobilgear SHC MT 68 offers outstanding rust ａnd corrosion protection versus conventional gear oils, including seawater ａnd acidic water protection. It shows no tendency to plug fine filters even when wet ａnd have excellent compatibility with ferrous ａnd non-ferrous metals even at elevated temperatures.
Mobilgear SHC MT 68 is recommended for enclosed marine gear drives including steel-on-steel spur, helical, ａnd bevel gears. The product was designed for heavy duty marine thruster gear applications. It may also be used in gear applications where extreme low and/or high temperatures are encountered ａnd applications where corrosion may be severe. Mobilgear SHC MT 68 enjoys a growing reputation among marine customers ａnd OEMs around the world.
Features ａnd Benefits
Mobil brand lubricants designated as SHC are recognised ａnd appreciated around the world for innovation ａnd outstanding performance. These molecular design PAO synthetic products, pioneered by our research scientists, symbolize the continuing commitment to using advanced technology to provide outstanding products.
A key factor in the development of Mobilgear SHC MT 68 was the close contacts between our scientists ａnd application specialists with key OEMs to ensure that our product offerings will provide exceptional performance with the rapidly evolving marine gear designs ａnd operation. To address the issue of micropitting gear wear, our product formulation scientists designed a proprietary combination of additives which would resist traditional gear wear mechanisms as well as protecting against micropitting. Our formulators chose proprietary PAO synthetic base oils to provide exceptional oil life ａnd deposit control ａnd resistance to thermal/oxidative ａnd chemical degradation, as well as the balance of the performance features. The wax-free nature of the synthetic base oil also provides low temperature fluidity characteristics unmatched by mineral products ａnd is a key benefit for remote, low ambient, applications. Mobilgear SHC MT 68 lubricants offer the following benefits:
| Features | Advantages ａnd Potential Benefits |
| Superb protection from micropitting fatigue wear as well as high resistance to traditional scuffing wear | Extended gear ａnd bearing life in marine enclosed gear drives operating under extreme conditions of load, speed ａnd temperature |
| Excellent resistance to degradation at high temperature | Extended oil life ａnd drain intervals reduced oil consumption ａnd manpower costs |
| Low traction PAO base stocks for improved gear efficiency | Reduced energy consumption ａnd lower operating temperatures |
| High viscosity index base stocks reduce viscosity change with temperature | Ability to operate at both high ａnd low temperatures: especially critical in marine applications |
| Excellent resistance to rust ａnd corrosion ａnd very good demulsibility | Smooth, trouble-free operation at high temperatures or in water-contaminated applications |
| No filter plugging, even in presence of water | Less filter changes ａnd reduced maintenance costs |
| Excellent compatibility with common gearbox materials of construction ａnd with mineral-based gear oils | Easy changeover from mineral products |
Applications
Application Considerations: While the Mobilgear SHC MT 68 is compatible with mineral oil based products mixture may detract from their performance. Consequently it is recommended that before changing a system to Mobilgear SHC MT 68, it should be thoroughly cleaned out ａnd flushed to achieve the maximum performance benefits.
Mobilgear SHC MT 68 is a premium performance, fully synthetic marine gear oil designed to provide optimum equipment protection ａnd oil life even under extreme conditions. They are especially formulated to resist micropitting of modern gearing ａnd can operate in both high ａnd low temperature environments.
The product was designed especially for marine thruster/azimuth gear drives requiring an ISO 68 viscosity gear oil with Extreme Pressure (EP) additive protection. Mobilgear SHC MT 68 has approvals from major marine thruster OEMs such as Brunvoll.
Specifications ａnd Approvals
| Mobilgear SHC MT 68 meets or exceeds the following industry specifications: | |
| AGMA 9005-E02-EP | X |
| DIN 51517 CLP (Part 3) | X |
| ISO 12925-1 Type CKD | X |
Typical Properties
| Mobilgear SHC MT 68 | |
| ISO Viscosity Grade | 68 |
| Viscosity, ASTM D 445 | |
| cSt @ 40ºC | 68 |
| cSt @ 100ºC | 10.8 |
| Viscosity Index, ASTM D 2270 | 149 |
| Pour Point, ºC, ASTM D 97 | -51 |
| Flash Point, ºC, ASTM D 92 | 240 |
| Specific Gravity @15.6 ºC kg/l, ASTM D 4052 | 0.855 |
| Timken OK Load, ASTM D2782, lb | 65 |
| FE 8 wear test, DIN 51819-3, D7,5/80-80. Roller wear, mg | 2 |
| FZG Scuffing, A/8,3/90, Fail Stage/Rating | 13+ |
| FZG Micropitting, FVA 54, Fail Stage/Rating | 10/High |
| 4-Ball Wear test, ASTM D 4172, mm (Mod1,800 RPM, 20kg, 54º C, 60 Minutes) | 0.37 |
| Rust protection, ASTM D665B, Sea Water | Pass |
| Water Seperability, ASTM D 1401,Time to 40/37/3 at 82º C, minutes | 10 |
| Foaming Characteristics, ASTM D 892 | |
| Seq II | 0/0 |
Health ａnd Safety
Based on available information, this product is not expected to produce adverse effects on health when used for the intended application ａnd the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS＇s are available upon request through your sales contract office, or via the Internet. 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 Mobilgear SHC are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.
