Heavy-Duty Synthetic Grease Provides Extreme Protection

Pyroshield Syn Open Gear Grease is a heavy-duty synthetic lubricant developed for large unshrouded open gears in the mining, mineral processing and cement industries, and for other severe service applications that require a lubricant with superior wear protection, exceptional load-carrying ability, outstanding tackiness and ease of application at various temperatures. It also works well for applications in which gears experience high point-of-contact temperatures of 327ºC (620ºF) and above.

A product of advanced lubricant technology providing boundary lubrication, unmatched performance and versatility, Pyroshield Syn Open Gear Grease is formulated with high-viscosity 100 percent synthetic base oil, a non-melting thickening system and LE's proprietary heat stable additives. It contains a synergistic mix of Almasol®, LE's exclusive wear-reducing additive, and a unique combination of extreme pressure additives.

Pyroshield®, Almasol® and Duolec® are registered trademarks of Lubrication Engineers, Inc.

Lubrication Engineers operates under an ISO 9001 Certified Quality System.
Unit of Measure

Benefits and Recommendations

Available Container Size

N/A Drum

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GHS Statement

N/A For commercial and professional use only

Beneficial Qualities

  • Increases uptime
  • Lengthens equipment life
  • Lowers lubricant consumption
  • Reduces maintenance
Superior Performance
  • Outperforms similar products in wear protection and load-carrying ability
  • Carries 90-lb Timken OK load
  • Resists shock loading
  • Provides excellent oxidation resistance and rust protection
  • Reduces noise in large open gears
Outstanding Tackiness
  • Clings tenaciously to surfaces
  • Resists removal by water, heat and other severe conditions
Wide Temperature Range
  • Does not thin or run at high temperatures
  • Has no dropping point (will not melt)
  • 5180 remains pumpable at low temperatures
  • Works for open gears and heavily loaded sliding applications
  • Comes in grades 0 and 2 to meet the needs of manual and automatic systems
  • Also available in aerosol

Available Grades

  • NLGI 2 applied, 2 in use (5182)
  • NLGI 0 applied, 2 in use (5180)
  • Aerosol as applied, 2 in use (5100)

Proprietary Additive

N/A LE's proprietary additives are used exclusively in LE lubricants. Pyroshield Syn Open Gear Grease contains Almasol.

Almasol® solid wear-reducing additive is able to withstand extremely heavy loads, chemical attack and temperatures up to 1,900ºF (1,038ºC). It is attracted to metal surfaces, forming a microscopic layer but not building on itself or affecting clearances. Almasol minimizes metal-to-metal contact and the resulting friction, heat and wear.

LE Modified Timken Test

N/A Conclusion

The results of the comparative product testing demonstrate the outstanding load-carrying capacity of Pyroshield Syn Open Gear Grease. It outperformed every competitive product that was tested. Pyroshield had a narrower wear scar and a lower block temperature than all the other lubricants. The test blocks of the competitive products experienced higher temperatures as a result of friction due to poor lubrication. The difference is easily visible in the amount of discoloration of the test blocks.

Pyroshield vs Competitive Open Gear Lubricants LWI

N/A Conclusion

The graph clearly shows the outstanding preventive wear performance that Pyroshield Syn Open Gear Grease provides as compared to competitive products. Load Wear Index (LWI) is a measure of lubricant's ability to carry a load and minimize wear. The higher the value, the better the lubricant does in preventing wear.


  • For best results when switching to Pyroshield Syn Open Gear Grease, first clean the area of application with LE’s Duolec® Vari-Purpose Gear Lubricant (1609).

Using Pyroshield 5100 & 5180
  • Use adequate ventilation if used indoors. These lubricants contain a safe, non-chlorinated solvent for improved pumpability and ease of application at low temperatures.
  • After application, the solvent evaporates. The resulting lubricant is an NLGI grade 2 grease.
  • 5180 should not be further diluted with solvent, even if partial evaporation has occurred, as the functional characteristics could be altered.

Performance Requirements Met or Exceeded

N/A 5180: Metso Mineral Grinding

Typical Applications

  • Various applications in the mining and mineral processing industry
  • Open gears and slides
  • Ball mill open gears
  • Kiln open gears
  • Bar screens
  • Dipper sticks
  • Circle rails

Asset Reliability Solutions

N/A Reliability Solution Products

Customer Testimonials

N/A 5180 Freeman Farms Trucking
5180 Tenn Luttrell Lime Co

Physical Characteristics - Typical

Thickener Type

N/A Bentone


N/A Smooth/Tacky


N/A Purple

NLGI Grade as Applied

N/A 0

NLGI Grade in Service

N/A 2

Performance Test Results

Worked 60 Penetration ASTM D217

N/A 365

Worked 10K Penetration ASTM D217

N/A +14

Worked 100K Penetration ASTM D217

N/A +28

Dropping Point ºC(ºF), ASTM D2265

N/A Non-melt

Flash Point ºC(ºF), ASTM D92

N/A 110 (230)

Viscosity @ 100°C, cSt, ASTM D445

N/A 690 (in service)

Viscosity @ 40°C, cSt, ASTM D445

N/A 26,180 (in service)

Pour Point °C (°F), ASTM D97

N/A 3 (37)

Oxidation drop in psi @ 100 hrs, ASTM D942

N/A 3

Corrosion Prevention DI H2O, ASTM D1743

N/A Pass

Timken OK Load lbs, ASTM D2509

N/A 90

Four-Ball EP Weld Point kgf, ASTM D2596

N/A 620

Four-Ball EP Load Wear Index kgf, ASTM D2596

N/A 136

Four-Ball Wear @ 75ºC (167ºF), 1,200 rpm, 40 kgf, 60 minutes, mm wear, ASTM D2266

N/A 0.71

Water Spray-off % Loss, ASTM D4049

N/A <2.0

Copper Corrosion 24 hrs @ 100ºC, ASTM D4048

N/A 1b