Mobil Centaur XHP™ 221
Mobil grease , Uzbekistan
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.
It is noted that calcium sulfonate technology sliding performance can, in some cases, increase tendency towards skid smear wear in rolling element bearings. This wear has been correlated with several conditions including light loading, grease overpack and frequent speed changes, where you may experience skid smear wear in rolling element bearings. Consideration should be given when using calcium sulfonate technology in applications with such risk factors or past experience of this type of wear. Contact your Mobil representative for further evaluation.
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. |
Applications
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
|
Property |
|
|
Grade |
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 |
1 |
|
Color, Visual |
Brown |
|
Oil Separation, 30 h @ 100 C, mass%, ASTM D6184 |
0.5 |
|
Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266 |
0.45 |
|
Oil Separation, 168 h @ 40 C, mass%, DIN 51817 |
0.3 |
|
Four-Ball Extreme Pressure Test, Weld Point, kgf, ASTM D2596 |
500 |
|
Viscosity Index, ASTM D2270 |
94 |
|
Viscosity @ 100 C, Base Oil, mm2/s, ASTM D445 |
18.7 |
|
Viscosity @ 40 C, Base Oil, mm2/s, ASTM D445 |
220 |
|
Dropping Point, °C, ASTM D2265 |
>308 |
|
Timken OK Load, kg, ASTM D2509 |
55 |
|
SKF Emcor Rust Test, Distilled Water, ASTM D6138 |
1 , 1 |
|
Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048 |
1A |
|
Penetration, 60X, 0.1 mm, ASTM D217 |
305 |
|
Corrosion Preventive Properties, Rating, ASTM D1743 |
Pass |
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.aspxAll trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.
07-2024