Product Description
The Mobilgear 600 Series are extra high performance gear oils having
outstanding extreme pressure characteristics and load-carrying properties,
intended for use in all types of enclosed gear drives with circulation or
splash lubrication systems. They are formulated from highly refined base
stocks and a special additive system that provides an extremely high level of
resistance to oxidation and chemical degradation. They have friction-modifying
characteristics that reduce power consumption and lower bulk oil temperatures.
The Mobilgear 600 Series oils protect against corrosion and rusting, including
seawater. They have excellent water separating properties and they are
strongly resistant to foaming in service.
Mobilgear 600 Series oils are recommended for industrial spur, helical and
bevel enclosed gears with circulation or splash lubrication, operating at bulk
oil temperatures up to 100ºC. For steel-on-steel applications, Mobilgear 600
Series are recommended whereas for bronze-on-steel worm gear applications,
Mobil Glygoyle Series or Mobil SHC 600 Series products are recommended. They
are particularly suitable for gear sets working under heavy or shock loads.
Minimum bulk oil temperatures are governed by the pour point of the oil.
Suitable heating may be necessary for the heavier grades at ambient
temperatures. Mobilgear 600 oils also find broad application in marine gearing
applications. Non gear applications include plain and rolling contact bearings
- especially highly loaded and slow speed.
Mobilgear 600 Series gear oils are used in a very wide variety of applications
in virtually all industrial sectors as well as in marine units. They are the
product of choice for many users, worldwide, based on their outstanding
performance, equipment protection and application versatility.
Features and Benefits
Mobilgear 600 Series products are a leading member of the Mobil brand of
industrial lubricants that enjoy a reputation for innovation and high
performance capability. These mineral-based products were designed by our
formulation scientists to provide high quality industrial gear oils, meeting
industry standards and with high versatility to lubricate a broad range of
industrial and marine equipment. Mobilgear 600 Series products offer
the following features and potential benefits:
Features
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Advantages and Potential Benefits
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Reduced gear tooth wear due to excellent load-carrying properties
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Lower operating costs, higher productivity and longer machine life because of
outstanding antiwear characteristics
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Outstanding resistance to oil oxidation and degradation
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Extended lubricant life with lower lubricant and lubrication costs and reduced
scheduled downtime
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Cleaner systems and reduced maintenance because of minimal sludge and deposit
formation
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Wide range of applications
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Fewer grades of lubricant required because of wide range of application,
leading to lower purchase and storage costs and less danger of using wrong
lubricant
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Superior resistance to rust and corrosion of steel and corrosion of copper and
soft metal alloys
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Excellent protection of machine parts, with reduced maintenance and repair
costs
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Marked resistance to foaming and emulsion formation
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Effective lubrication and problem free operation in the presence of water
contamination or in equipment prone to oil foaming
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Applications
Mobilgear 600 lubricants are used in a wide range of industrial and marine
applications, especially spur, helical, bevel and worm gearing. Specific
applications include:
- Industrial gearing for conveyers, agitators, dryers, extruders, fans, mixers, presses, pulpers, pumps (including oil well pumps), screens, extruders and other heavy duty applications
- Marine gearing including main propulsion, centrifuges, deck machinery such as winches, windlasses, cranes, turning gears, pumps, elevators and rudder carriers
- Non-gear applications include shaft couplings, screws and heavily loaded plain and rolling contact bearings operating at slow speeds.
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Specifications and Approvals

Mobilgear 600 Series meets or exceeds the following industry specifications
| 
626
| 
627
| 
629
| 
630
|
| Meets AGMA 9005-D94 EP (at appropriate viscosity grade) | X | X | X | X |
| Meets DIN 51517 Part 3 (CLP) | X | X | X | X |
| Meets ISO 12925-1 Type CKC | X | X | X | X |
| Meets US Steel # 224 | X | X | X | X |

Mobilgear 600 Series meets or exceeds the following industry specifications
| 
632
| 
634
| 
636
|
| Meets AGMA 9005-D94 EP (at appropriate viscosity grade) | X | X | - |
| Meets DIN 51517 Part 3 (CLP) | X | X | X |
| Meets ISO 12925-1 Type CKC | X | X | X |
| Meets US Steel # 224 | X | X | - |
Typical Properties

Mobilgear 600 Series
| 
626
| 
627
| 
629
| 
630
|
| ISO Viscosity Grade | 68 | 100 | 150 | 220 |
| Viscosity, ASTM D 445 | | | | |
| cSt @ 40ºC | 68 | 100 | 150 | 220 |
| cSt @ 100ºC | 9.2 | 12.0 | 15.8 | 19.5 |
| Viscosity Index, ASTM D 2270 | 98 | 98 | 98 | 98 |
| Pour Point, ºC, ASTM D 97 | -27 | -27 | -27 | -24 |
| Flash Point, ºC, ASTM D 92 | 225 | 235 | 245 | 255 |
| Density @15.6ºC, ASTM D 4052, kg/l | 0.89 | 0.89 | 0.89 | 0.89 |
| Timken OK Load, ASTM D 2782, lb | 65 | 65 | 65 | 65 |
| 4-Ball EP test, ASTM D 2783, Weld Load, kg Load Wear Index, kgf | 250 48 | 250 48 | 250 48 | 250 48 |
| FZG Scuffing, DIN 51534, A/8.3/90, Fail Stage | 12+ | 12+ | 12+ | 12+ |
| Rust protection, ASTM D 665, Sea Water | Pass | Pass | Pass | Pass |
| Copper Strip Corrosion, ASTM D 130, 3 hrs @ 100ºC | 1B | 1B | 1B | 1B |
| Demulsibility, ASTM D 1401, @ 54ºC Time to 3ml emulsion, minutes @ 82ºC | 30 | 30 | 30 | 30 |
| Foam Test, ASTM D 892, Seq I and II, Tendency/Stability, ml/ml | 0/0 | 0/0 | 0/0 | 0/0 |

Mobilgear 600 Series
| 
632
| 
634
| 
636
|
| ISO Viscosity Grade | 320 | 460 | 680 |
| Viscosity, ASTM D 445 | | | |
| cSt @ 40ºC | 320 | 460 | 680 |
| cSt @ 100ºC | 24.5 | 29.9 | 39.2 |
| Viscosity Index, ASTM D 2270 | 97 | 96 | 90 |
| Pour Point, ºC, ASTM D 97 | -18 | -12 | -9 |
| Flash Point, ºC, ASTM D 92 | 265 | 275 | 285 |
| Density @15.6ºC, ASTM D 4052, kg/l | 0.89 | 0.89 | 0.91 |
| Timken OK Load, ASTM D 2782, lb | 65 | 65 | 65 |
| 4-Ball EP test, ASTM D 2783, Weld Load, kg Load Wear Index, kgf | 250 48 | 250 48 | 250 48 |
| FZG Scuffing, DIN 51534, A/8.3/90, Fail Stage | 12+ | 12+ | 12+ |
| Rust protection, ASTM D 665, Sea Water | Pass | Pass | Pass |
| Copper Strip Corrosion, ASTM D 130, 3 hrs @ 100ºC | 1B | 1B | 1B |
| Demulsibility, ASTM D 1401, @ 54ºC Time to 3ml emulsion, minutes @ 82ºC | 30 | 30 | 30 |
| Foam Test, ASTM D 892, Seq I and II, Tendency/Stability, ml/ml | 0/0 | 0/0 | 0/0 |
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Precautions
MOBILGEAR 600 SERIES is manufactured from high quality petroleum base stocks,
carefully blended with selected additives. As with all petroleum products,
good personal hygiene and careful handling should always be practiced. Avoid
prolonged contact to skin, splashing into the eyes, ingestion or vapour
inhalation. Please refer to our Imperial Oil Material Safety Data Sheet for
further information.
Note: This product is not controlled under Canadian WHMIS legislation.
The Mobil logotype, the Pegasus design and Delvac are trademarks of ExxonMobil Corporation, or one of its subsidiaries.
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