Mobil SHC bearing grease

Our Mobilith SHC™ PM Series synthetic greases are designed specifically for today’s most severe paper machine applications, including extreme temperatures, exposure to process water and low starting torque.

These synthetic greases provide outstanding protection against rust and corrosion from acid and alkali water chemistries, making them ideal for wet end paper machine bearings. They also can:

  • Reduce downtime and maintenance costs
  • Extend service life with longer intervals between relubrication
  • Extend bearing life

Product series information

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Features and Benefits

The Mobil SHC brand of oils and greases is recognized and appreciated for their innovation and outstanding performance. The Mobilith SHC series symbolizes our continued commitment to using advanced technology to provide outstanding products. A key factor in the development of Mobilith SHC PM greases was the close contacts between our scientists and application specialists with key paper machine designers to ensure that our product offerings would provide exceptional performance in this continually evolving, and increasingly severe, equipment area.

Our work with equipment builders has helped confirm the results from our own laboratory tests showing the exceptional performance of the Mobilith SHC PM greases. These benefits include excellent resistance to acidic and alkaline water, enhanced bearing protection and bearing life, wide temperature range of application, and longer grease life.

To combat high thermal exposure our product formulation scientists chose proprietary synthetic base oils for Mobilith SHC PM grease because of their exceptional thermal and oxidative resistance. Our scientists developed a high performance lithium complex thickener technology and used specific additives to enhance Mobilith SHC PM greases to meet the needs of modern and future paper machines. Mobilith SHC PM greases offer the following features and benefits:

 

Features

Advantages and Potential Benefits

Outstanding high temperature and low temperature performance

Wide application temperature range, from -40ºC to 150°C with excellent protection at high temperatures and low torque, easy start-up at low temperatures

Excellent protection against wear, rust and corrosion, including acidic water

Reduced downtime and maintenance costs because of reduced wear, rust and corrosion even in acidic and alkaline water environments

Excellent structural stability and oxidation resistance

Extended service life with longer intervals between relubrication and improved bearing life

Excellent wear protection under heavy loads, slow speeds, and high temperatures

Outstanding protection of slow speed, heavily loaded bearings, with extended bearing life

Outstanding structural stability in the presence of water

Retains excellent grease performance in hostile aqueous environments

Low volatility

Helps resist viscosity increase at high temperatures to maximize relubrication intervals and bearing life

 

Applications

Application Considerations: While Mobilith SHC PM greases are compatible with most mineral oil based products, admixture may detract from their performance. Consequently it is recommended that before changing a system to one of the Mobilith SHC PM greases, it should be thoroughly cleaned out to achieve the maximum performance benefits. If dismantling the system for cleaning before changeover isn't feasible, then thorough purging and increased relubrication intervals are strongly recommended. Contact your local ExxonMobil Lube Engineer for consultation on this approach.

 

Mobilith SHC PM greases are recommended for critical rolling element bearing applications in paper machines. Included among these are:

     •  Wet end paper machine bearings.

     •  Highly loaded press section bearings.

     •  High-temperature felt roll and calendar stack bearings.

 

Specifications and Approvals

This product meets or exceeds the requirements of:

PM 220

PM 460

DIN 51825:2004-06 - KP HC 1-2 N -40

X

X

 

Properties and Specifications

Property

PM 220

PM 460

Grade

NLGI 1.5

NLGI 1.5

Thickener Type

Lithium Complex

Lithium Complex

Color, Visual

Off-White

Off-White

Copper Strip Corrosion, Rating, ASTM D4048

1A

1A

Corrosion Preventive Properties, Rating, ASTM D1743

PASS

PASS

Dropping Point, °C, ASTM D2265

275

275

Four-Ball Extreme Pressure Test, Weld Load, kgf, ASTM D2596

250

250

Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266

0.5

0.5

Oil Separation, 0.25 psi, 24 h @ 25 C, mass%, ASTM D1742

3

3

Penetration, 60X, 0.1 mm, ASTM D217

305

305

Roll Stability, Penetration Consistency Change, 0.1 mm, ASTM D1831

-5 to +5

-5 to +5

SKF Emcor Rust Test, Acidic Water, Bearing 1, ASTM D6138

0

0

SKF Emcor Rust Test, Acidic Water, Bearing 2, ASTM D6138

0

0

SKF Emcor Rust Test, Distilled Water, Bearing 1, ASTM D6138

0

0

SKF Emcor Rust Test, Distilled Water, Bearing 2, ASTM D6138

0

0

Timken OK Load, lb, ASTM D2509

65

65

Viscosity @ 100 C, Base Oil, mm2/s, ASTM D445

30.3

55.6

Viscosity @ 40 C, Base Oil, mm2/s, ASTM D445

220

460

Viscosity Index, ASTM D2270

179

188

Water Washout, Loss @ 79 C, wt%, ASTM D1264

2

3

 

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