Product Description

Mobil SHC™ Grease 461 WT and Mobil SHC™ Grease 681 WT are specially formulated to lubricate yaw, pitch and main bearings of wind turbines. They are high performance synthetic lithium complex greases specially designed to exceed the demanding requirements of wind turbine applications at extreme temperatures. The advanced synthetic base fluid with its low traction coefficient provides excellent low temperature pumpability and very low starting and running torque.

Features and Benefits

•  Superb thermal stability and oxidation resistance compared to conventional greases helps provide extended service life with longer relubrication intervals for wind turbines

•  Outstanding low temperature performance compared to conventional greases provides excellent protection at low temperatures providing low torque and easy start-up at low temperatures

•  Excellent rust and corrosion protection provides enhance performance in wet conditions for reduced downtime and maintenance costs compared to/versus conventional greases

•  Outstanding structural stability in the presence of water helps retain grease consistency in hostile aqueous environments

•  Excellent low temperature pumpability provides reliable lubrication of bearings using centralized grease systems or grease dispensers

•  Low traction base oil coefficient offers potential improved mechanical life and reduced energy costs versus conventional greases

•  Increased oil viscosity for extra protection with excellent low temperature properties

•  No dye for improved housekeeping

•  Excellent performance in the Wind Industry Riffel test

Applications

Mobil SHC Grease 461 WT is an NLGI 1.5 Grade extreme pressure grease with ISO VG 460 synthetic base fluid recommended for tough wind turbine applications. Mobil SHC Grease 681 WT is an NLGI 1.5 Grade extreme pressure grease with ISO VG 680 synthetic base fluid recommended for tough wind turbine applications requiring addition EHL protection.

Mobil SHC Grease 461 WT and Mobil SHC Grease 681 WT meet most specifications of wind turbine builders and component suppliers and can demonstrated outstanding performance in the lubrication of yaw, pitch, and generator bearings either manual greased or using centralized grease systems or grease dispensers.

Recommended application temperature range of Mobil SHC Grease 461 WT for continuous operation is from -50°C to 150°C with proper regreasing intervals. Recommended application temperature range of Mobil SHC Grease 681 WT for continuous operation is from -40°C to 150°C with proper regreasing intervals.

Specifications and Approvals

Properties and Specifications

Health and Safety

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Imperial Oil

Petroleum and Chemicals Division
Lubricants and Specialties
240 Fourth Ave SW
C. P. 2480, Station M
Calgary AB T2P 3 M 9

1-800-268-3183

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification. Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations. The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit www.exxonmobil.com
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