Mobilgrease XHP 681 Mine
Grease
Product Description
Mobilgrease XHP 681 Mine, a member of the Mobilgrease XHP family, is a highly specialized grease engineered to handle the lubrication demands of off-road equipment used in the mining industry. Using the same leading edge, proprietary lithium complex technology, Mobilgrease XHP 681 Mine utilizes an ISO 680 viscosity and a polymer-enhanced backbone to provide the water resistance and wet shear stability critical to successful grease lubrication for this environment. The AW/EP additive system coupled with 5% molybdenum disulfide loading provides balanced load-carrying capability across a spectrum of load, speed and temperature conditions, all prevalent in mining equipment used in the job of digging and hauling mineral deposits on a daily basis. Additionally, Mobilgrease XHP 681 has exceptional staying power and extended service capabilities with very good water wash-out, spray-off, will not corrode steel or copper bearing alloys, is compatible with conventional sealing materials. All of this performance does not come at the expense of pumping characteristics, as Mobilgrease XHP 681 Mine retains good mobility even at moderately low temperatures.
Features and Benefits
Mobilgrease XHP 681 is a leading member of the Mobilgrease brand of products, which has gained a reputation world-wide for innovation and performance excellence. Mobilgrease XHP greases are state-of-the-art products designed by our formulation technologists and backed by our world-wide technical support staff.
A key factor in the excellent adhesion and cohesion properties and high drop point of Mobilgrease XHP 681 is the proprietary manufacturing technology developed at our research facilities and adopted by our modern manufacturing facilities. These products use specially selected additives to provide excellent oxidation stability, rust and corrosion control, resistance to water contamination as well as anti-wear and EP protection. Mobilgrease XHP 681 offers the following features and potential benefits:
| Features |
Advantages and Potential Benefits |
| Superb resistance to water washout and spray-off |
Helps assure proper lubrication and protection even in the most severe water exposure conditions |
| Highly adhesive and cohesive structure |
Excellent grease tenacity helps reduce leakage and extend re-lubrication intervals for reduced maintenance requirements. |
| Excellent rust and corrosion resistance |
Helps protect lubricated parts even in hostile aqueous environments, especially acidic water |
| Very good resistance to thermal, oxidative and structural degradation at high temperature |
Extended grease life and enhanced bearing protection in high temperature applications helps reduce maintenance and replacement costs. |
| Very good anti-wear and EP performance |
Provides reliable protection of lubricated equipment, even under conditions of high sliding and shock loading with potential for extended equipment life and reduced unanticipated downtime |
Applications
Mobilgrease XHP 681 Mine is designed primarily for use in the mining industry where it is recommended by ExxonMobil for the lubrication of slow moving plain and rolling element bearings. It will provide extraordinary performance in contractor, construction, earthmoving, mobile and stationary equipment particularly where long lubrication intervals or oscillating/vibrating motion is present.
Typical Properties
| Mobilgrease XHP |
681 Mine |
| NLGI Grade |
1 |
| Thickener Type |
Li-Complex |
| Color, Visual |
Gray |
| Molybdenum DiSulfide, wt %, calculated |
5% |
| Dropping Point, ºC, ASTM D 2265 |
280 |
| Viscosity of Oil, ASTM 445 cSt @ 40º C |
680 |
| Penetration, Worked, 25º C, ASTM D 217 |
325 |
| Penetration Consistency Change, Roll Stability, ASTM D 1831, mm/10 |
+10 |
| Penetration 100,000 Stroke, Change From 60 Stroke, ASTM D 217, mm/10 |
+10 |
| Low Temperature Mobility @ 20 F, M 1390, grams/min |
11 |
| 4-Ball Wear Test, ASTM D 2266, scar, mm |
0.5 |
| 4-Ball Weld Load, ASTM D 2596, Kg |
620 |
| 4-Ball EP, ASTM D 2596, Load Wear Index |
91.5 |
| Bomb Oxidation, ASTM D 942, Pressure drop at 100 hrs, kPa |
20.7 |
| Corrosion Prevention, ASTM D 1743 |
Pass |
| Oil Separation, ASTM D 1742, % Wt. Loss |
2 |
| Water Resistance, DIN 51807, Rating |
0 |
| Copper Strip Corrosion, ASTM D 4048, Rating |
1A |
| Water Spray Resistance, ASTM D 4049, % Spray-off |
38.7 |
| Water Washout, ASTM D 1264, Wt % loss at 79º C |
2.5 |
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.
All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.
12-2011
Copyright © 2001-2013 Exxon Mobil Corporation. All rights reserved.
