Ball bearing in blue grease

Mobilgrease XHP™ 681 Mine

Grease

  • Safety Data Sheets (SDS)
  • Product Data Sheets (PDS)

Our Mobilgrease XHP™ 681 Mine grease is designed for the lubrication of extra-heavy-duty off-highway and mining equipment. It is specially formulated with lithium-complex technology to provide:

  • Exceptional staying power
  • Water washout and spray-off resistance
  • Extended service capabilities
  • Compatibility with conventional sealing materials

This grease adheres to surfaces, preventing rainwater and dredging operations from washing it away, and helps to ensure proper lubrication and equipment protection even in some of the most severe water-exposure mining industry conditions. 

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Data sheets

Product Data Sheets (PDS)
Safety Data Sheets (SDS)

Technical resources

Industrial grease lubricant application guide

Looking for a guide on which Mobil™ industrial grease best suits your needs? We have you covered.

Technical topics, PDF

Mobilgrease XHP™ 681 Mine helps Colombian mining company extend equipment life*

With Mobilgrease XHP™ 681 Mine grease and an effective preventive maintenance program, one mining company generated an annual savings of US $118,670. Find out more.

Success stories, PDF

All resources

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.

 

Properties and Specifications

Property

Grade

NLGI 1

Thickener Type

Lithium Complex

Base Oil Viscosity of Greases @ 40 C, mm2/s, AMS 1697

680

Color, Visual

Gray

Copper Strip Corrosion, Rating, ASTM D4048

1A

Corrosion, Bearing, Rating, ASTM D1743

PASS

Dropping Point, °C, ASTM D2265

280

Four-Ball Extreme Pressure Test, Load Wear Index, kgf, ASTM D2596

91.5

Four-Ball Extreme Pressure Test, Weld Load, kgf, ASTM D2596

620

Four-Ball Wear Test, Scar Diameter, 40 kg, 1200 rpm, 1 h, 75 C, mm, ASTM D2266

0.5

Oil Separation, 24 h @ 25 C, mass%, ASTM D1742

2

Oxidation Stability, Pressure Drop, 100 h, kPa, ASTM D942

20.7

Penetration Consistency Change, Roll Stability, %, ASTM D1831

+10

Penetration, 60X, 0.1 mm, ASTM D217

325

Penetration, Worked, Change from 60X to 100,000X, 0.1 mm, ASTM D217

+10

US Steel Mobility @ 20 F, g/min, AMS 1390

11

Water Resistance, 3 h @ 90 C, Rating, DIN 51807-1

0

Water Sprayoff, Loss, %, ASTM D4049

38.7

Water Washout, Loss @ 79 C, wt%, ASTM D1264

2.5

 

Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

  • Corrosion protection
  • Enhanced wear protection
  • Extended life
  • Extreme pressure
  • High temperature
  • Lithium complex
  • Low temperature
  • Severe operating conditions
  • Water resistance
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