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Item # 1604, Duolec® Industrial Gear Oil 1604

High-Performance Oil Delivers Superior Lubrication in High-Temperature, High-Load Applications

Duolec Industrial Gear Oil (1601-1610, 1302, 1304) is a high-performance industrial gear oil with ISO grades ranging from ISO VG 46 to 1500. Designed for use in any industrial gear or bearing application that requires a thermally stable, extreme pressure/antiscuff lubricant, it maintains performance even after filtration.

Duolec Industrial Gear Oil contains Duolec, LE’s dual acting additive that provides both wear-reducing and EP protection, and is fortified with a shear stable tackifier to provide adhesion to metal during use.

Benefits and Recommendations  · Physical Characteristics - Typical  · Performance Test Results  · Customer Testimonials

Benefits and Recommendations

Available Container Size

120(QUOTE) Pound
(QUOTE) Pound
(QUOTE) Pound
2,100 Pound Disposable Tank
4,200 Pound Returnable Tank

Typical Applications

  • Enclosed gearboxes
  • Bowl mills / pulverizers
  • Homogenizers
  • Planetary gears
  • Oil lubricated bearings

Beneficial Qualities

Maintains Performance in Extreme Conditions
  • Possesses high film strength
  • Remains stable despite high temps
  • Resists oxidation and sludge formation
  • Provides wear-reducing and EP/antiscuff protection
Adheres to Metal
  • Contains shear-stable tackifier that allows oil to adhere to metal components
  • Remains tacky during high shear use
Resists Moisture
  • Separates readily from water, continuing to provide effective lubrication
    • Ordinary gear oils will emulsify and foam, causing increased friction and poor lubrication
  • Contains no solids that can be removed during filtration
  • Remains within viscosity grade after filtration

Performance Requirements Met or Exceeded

  • ANSI/AGMA 9005-F16
  • AIST 224 (US Steel 224)
  • DIN 51517-3 CLP
  • ISO 12925-1 CKD
  • USDA H2

Asset Reliability Solutions

Reliability Solution Products

Proprietary Additives

LE’s proprietary additives are used exclusively in LE lubricants. Duolec® Vari-Purpose Gear Lubricant contains Duolec.

Duolec® dual-acting additive imparts synergistic properties to lubricants, providing both wear-reducing and extreme pressure protection. The result of revolutionary technology designed specifically for use in LE gear lubricants, Duolec increases oil film strength and is temperature activated to provide a protective layer that smooths metal surfaces and minimizes the effects of any contact, thereby reducing friction and preventing surface wear.

Physical Characteristics - Typical



AGMA Grade

4 EP

Viscosity @ 100°C, cSt, ASTM D445


Viscosity @ 40°C, cSt, ASTM D445


Viscosity Index ASTM D2270


Flash Point °C(°F), (COC), ASTM D92

210 (410)

Pour Point °C (°F), ASTM D97

-21 (-6)

Relative Density ASTM D1298


Performance Test Results

Foaming Characteristics @ 24ºC/93.5ºC/24ºC, 3 sequences, ml of foam / time to break, ASTM D892

0/0, 0/0, 0/0

Timken OK Load lbs (kgs), ASTM D2782

75 (34)

Four-Ball Wear @ 75ºC, 1200 rpm, 40 kgf, 60 minutes, mm wear, ASTM D4172


Rust Test 4 hrs @ 60ºC, Sea H2O, ASTM D665B


Customer Testimonials

Customer Testimonials

1604 AC Miller Concrete Products
1604 Glacial Sand Gravel


1601-1610_1302_1304 Product Flyer