Mobil Centaur XHP™ 221

Mobil grease , Greece

Multipurpose Calcium Sulphonate Complex Grease

Product Description

Mobil Centaur XHP 221 premium multipurpose grease has been formulated to lubricate rolling element bearings in industrial machinery operating at high temperatures under wet, heavily loaded conditions.


Features and Benefits

Mobil Centaur XHP 221 offers the following features and benefits :



Advantages and Potential Benefits

Excellent resistance to water and corrosion

The calcium sulphonate thickener system protects against water washout and bearing corrosion under challenging conditions

Exceptional mechanical stability

Resists softening under mechanical shear in the presence of process water contamination.

High load carrying properties

Excellent extreme pressure protection at low to moderate speeds is provided by the grease thickener system.

Excellent thermal stability

Resists oxidation and oil separation at high temperatures, and provides excellent life in accelerated bearing life tests.



Mobil Centaur XHP 221 is recommended for lubrication of rolling element bearings in machinery operating at high temperatures where resistance to water washing and corrosion are important. Specific examples of such applications include :

     •  Wet-end paper machine bearings

     •  Heavily loaded industrial ball and roller bearings

     •  Bearings in steel mill and mining operations


Specifications and Approvals


This product meets or exceeds the requirements of:

DIN 51825: 2004-06 KPF1-2G-20


Properties and Specifications




NLGI 1.5

Thickener Type

Calcium Sulfonate

SKF Emcor Rust Test, Acidic Water, ASTM D6138

1 , 1

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


Color, Visual


Oil Separation, 30 h @ 100 C, mass%, ASTM D6184


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


Oil Separation, 168 h @ 40 C, mass%, DIN 51817


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


Viscosity Index, ASTM D2270


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


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


Dropping Point, °C, ASTM D2265


Timken OK Load, kg, ASTM D2509


SKF Emcor Rust Test, Distilled Water, ASTM D6138

1 , 1

Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048


Penetration, 60X, 0.1 mm, ASTM D217


Corrosion Preventive Properties, Rating, ASTM D1743



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

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ExxonMobil Lubricants & Specialties


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 
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