Mobilgear MS Series

Gear Oils

Mobilgear™ MS Series are extra high performance oils designed for the oil-fog or mist-lubrication of machine components such as slideways, bearings, gears, chains etc. They are formulated from high quality, solvent refined base stocks and a unique additive system designed for optimum reclassifying properties. They have a high resistance to oxidation and good extreme pressure and anti-wear properties. The products have enhanced surface wetting capabilities and they reclassify (or agglomerate) readily from a mist to a liquid when the mist is subjected to extreme turbulence or is impinged onto a surface at high velocity. This allows a lubricating film to form on bearings and gears and prevents stray mist from escaping through narrow apertures into the atmosphere.

 

The four viscosity grades in the Mobilgear MS Series, ranging from ISO VG 32 to 460, allow the machine designer to choose the product most suitable for proper mist lubrication of machine elements. The heavier grades are used on ways, gears, and slow-speed, heavily loaded bearings, while the lower viscosity grades are used in high-speed bearings.

 

Technical Resources

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Features and Benefits

The Mobilgear MS Series of products is an important member of the Mobil brand of lubricants and enjoy recognition among equipment operators for their superb performance capabilities in misting applications. Mobilgear MS Series oils were developed specifically for mist applications and have undergone an arduous protocol of testing, including misting performance, in their development.

Mobilgear MS Series offer the following features and potential benefits:

 

Features

Advantages and Potential Benefits

Superior mist forming and reclassifying properties

Ensures even distribution of lubricant on machine parts with control of stray mist for reliable lubrication and problem-free operation, reduced leakage and lower oil consumption

Excellent EP and anti-wear performance

Prevents machine element wear with resulting savings in maintenance and parts replacement

High quality base oil and additive components

Avoids reclassifier plugging problems which can result in catastrophic bearing and gear failure, with accompanying downtime and replacement costs

Excellent resistance to oxidation

Long product life, reduced product and maintenance costs

Very good rust protection including sea water

Excellent equipment protection

 

Applications

Mobilgear MS Series oils are designed for use in all oil mist lubrication systems. Such systems work by dispersing very small droplets of oil in smoothly flowing air, distributing the oil mist to the points of application and mechanically condensing the mist, causing the oil to impinge on and wet the surfaces to be lubricated. The higher viscosity Mobilgear MS grades may require thermal misting devices to form proper dispersions when ambient temperatures are moderate or low. Mobilgear MS is suitable for oil / air delivery systems such as airline oilers. Specific applications include:

     •  Industrial gearing such as cooling tower gearboxes

     •  Slow-speed, heavily-loaded bearings (higher viscosity grades)

     •  High-speed bearings (lower viscosity grades)

     •  Machine tools, ways and screws

     •  Process pumps, electric motors and blowers

     •  Steam turbines and electric motors

 

Properties and Specifications

Property

32

100

320

460

Grade

ISO 32

ISO 100

ISO 320

ISO 460

Density @ 15.6 C, kg/l, ASTM D4052

0.88

0.89

0.90

0.90

EP Properties, Timken OK Load, lb, ASTM D2782

65

65

65

FZG Scuffing, Fail Load Stage, A/8.3/90, ISO 14635-1

12+

12+

12+

12+

Flash Point, Cleveland Open Cup, °C, ASTM D92

210

234

230

238

Four-Ball Extreme Pressure Test, Load Wear Index, kgf, ASTM D2783

48

48

48

Four-Ball Extreme Pressure Test, Weld Load, kgf, ASTM D2783

250

250

250

Four-Ball Wear Test, Scar Diameter, 20 kg, 1800 rpm, 1 h, 54 C, mm, ASTM D4172

0.3

0.3

0.3

Kinematic Viscosity @ 100 C, mm2/s, ASTM D445

5.5

11.2

25

31.5

Kinematic Viscosity @ 40 C, mm2/s, ASTM D445

32

100

320

460

Pour Point, °C, ASTM D97

-12

-12

-9

-6

Rust Characteristics, Procedure B, ASTM D665

PASS

PASS

PASS

PASS

Viscosity Index, ASTM D2270

110

95

100

100

 

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