Mobil Centaur XHP 221

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Mobil Centaur XHP 221

Multipurpose Calcium Sulphonate Complex Grease

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 :

Features 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

Mobil Centaur XHP 221 meets or exceeds the requirements of:  
DIN 51825: (2004-06) KP1-2G-20

Typical Properties

Mobil Centaur XHP 221  
NLGI Grade 1.5
Thickener Type Calcium Sulphonate Complex
Color Brown
ISO Viscosity Grade of Oil 220
Dropping Point, ASTM D 2265, °C 318
Worked Penetration, ASTM D 217, mm/10 @25°C 300
Worked Penetration Change after 100k Strokes, ASTM D 217, mm/10 10
Water Washout @ 79°C, ASTM D 1264, wt% 1
EMCOR Bearing Corrosion in Distilled Water, ASTM D 6138, Rating 0/1
Copper Corrosion, ASTM D 4048, Rating 1b
Four Ball Weld, ASTM D 2596, kgf 400
Timken OK Load, ASTM D 2509, kg 27
Oil Separation @ 100°C after 30 hours, ASTM D 6184, wt% 2
Wheel Bearing Life @ 160°C, ASTM D 3527, hours 120

Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended applications and the recommendations provided in the Material Safety Data Sheet. MSDS’s are available upon request through your sales contact office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.


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