Mining equipment lubricant

Mobil Dynagear™ Series

In the mining industry, heavily loaded open-gear sets are exposed to a wide range of operating conditions. Learn how Mobil Dynagear™ Series lubricants can work for you.

Our Mobil Dynagear™ Series lubricants are designed to provide outstanding protection of heavily loaded open-gear sets exposed to a wide range of operating conditions, especially those common in the mining industry. These lubricants provide extreme pressure/antiwear performance and remain in place even in tough conditions of water spray, dust and dirt, and extreme temperatures.

Mobil Dynagear Series lubricants are solvent-free and result in:

  • Reduced run-off that can occur during application
  • Excellent water resistance
  • Excellent rust and corrosion control
  • Good low temperature pumpability
  • Powerful extreme pressure protection


Solvent-free formulation

reduces waste
Reduce industrial waste
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Product series information

   Mobil Dynagear™ Series performance profile 1.189 MB/pdf
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   Advancing Productivity mining brochure 528.979 KB/pdf
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   Open gear lubricants best practices 3.777 MB/pdf
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Mobil Dynagear™ Series offers 4 lubricant grades

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Features and Benefits

Mobil Dynagear 800 Extra, 600 SL, 2000, and 4000 are leading members of the Mobil Industrial Lubricants offered greases. The Mobil Dynagear Series of products have been specifically designed by ExxonMobil formulation technologists and are backed by our worldwide technical support staff.

The Mobil Dynagear Series was specifically formulated to meet the needs of heavily loaded gearsets commonly found in the mining industry that require exceptional EP /Anti-Wear performance and which would remain in place even in tough conditions of water spray, dust and dirt, and high and low temperatures. These greases offer the following features, advantages, and potential benefits:

FeaturesAdvantages and Potential Benefits
Solvent free formulationHigher lubricant flash points can help improve safety performance and reduce waste and associated disposal costs
 Asphalt free formulationHelps maintain system cleanliness, clean spray nozzles, prevents root build up and prevent flaking.
Carbon Black Free formulationCarbon black is not used in the formulation and thereby does not contribute to potential health effects related to exposure to carbon black.
Excellent water resistance“Stay in Place” performance and the ability to absorb moderate amounts of water with little change to the lubricant film
Excellent anti-rust, corrosion controlLong life for protected parts helps reduce maintenance associated with damaged surfaces
Very good low temperature pumpability and mobility for use in centralized systemsProvides excellent low temperature pumpability and start-up performance, a key feature for remote applications.
Powerful EP (extreme pressure) protection enhanced with solid lubricantsHelps protect mating surfaces against damaging wear in contact zones, helping to extended component life and reduce unplanned maintenance and repairs



  • The Mobil Dynagear Series of open gear lubricants are highly recommended for shovel dipper sticks and racks, swing gears (circle), propel system bushings, crowd gears, sheave bearings and undercarriage lubrication points.
  • Mobil Dynagear 800 Extra and Mobil Dynagear 600 SL are recommended as all season multi-purpose greases and as low temperature open gear lubricants.
  • Mobil Dynagear 2000 is specifically designed for use in applications operating at higher ambient temperatures and requiring greater film thickness.
  • Mobil Dynagear 800 Extra meets the requirements of P&H SHOVELS 464 OGL for the lubrication of open gears.
  • Mobil Dynagear 4000 is recommended by ExxonMobil for the lubrication of the hoist gear on Caterpillar Mining Electric Shovel Hoist Drum Gear sets and in applications where an extra heavy open gear lubricant is desired.
  • The Mobil Dynagear Series is recommended by ExxonMobil for use in mining, grinding, mill applications and other industrial applications, where the grease is dispensed through central grease systems
  • Mobil Dynagear 800 Extra is suitable for use as an all-season, multi-purpose grease for on-board systems on heavy duty equipment where NLGI 00 grade greases are recommended.

To help you select the correct grade of Mobil Dynagear for your equipment and operation, please contact your Sales Representative, or the ExxonMobil Technical Help Desk at 800 268 3183.


Specifications and Approvals

Mobil Dynagear Series meets or exceeds the requirements of:Mobil Dynagear 800 Extra (formerly Dynagear Extra)


Typical Properties

Operating Temperature, °C, Multi-purpose grease -40 to +40 -37 to +50 - -
Operating Temperature, °C, OGL, except hoist gear* -40 to +10 -37 to +10 -20 to +45 -10 to 55
Operating Temperature, °C, Hoist Drum Gear* - - - -10 to 35
Min. Dispensing Temp., °C -45 -40 -20 -10
Worked Penetration mm/10 @ 25°C 400 335 380 390
Dropping Pt., °C 175 198 193 177
Flash Point, Base Fluids158204243268
Rust Protection PassPassPassPass
Copper Strip Corrosion, 24 hours @100°C1111
Oil Phase Viscosity    
  cSt @ 40°C 680 620 2000 4000
  cSt @ 100 °C 60 60 120 -
Molybdenum Disulfide, Wt. %,>2.0>2.0>2.0>2.0
Timken OK Load, kg 25 25 25 25
4 Ball EP, kgf    
Weld 800 800 800 800
LWI 145 145 145 145
4 Ball Wear Scar Diameter, mm 0.55 0.6 0.5 0.42
Timken Retention (30 lbs./30 min.) Pass Pass Pass Pass
Lincoln Ventmeter    
  psi @ -40°C 200   
  psi @ -35°C - 183 - -
  psi @ -30°C - 0 - -
  psi @ -20°C - - 117 -
  psi @ -6°C - - - 300
Apparent Viscosity, 20 sec.-1  @-30° 10,000 @0°C 2000 @0°C 2500
shear, P @-40°C 10,000 @-40°C 38,000 @-15°C 9000 @-10°C 9200

The values shown above are representative of current production. Some are controlled by manufacturing and performance specifications while


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 contact 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.