Date: 2013-08-22

SKF spherical plain bearings with precision and speed associated with grease

　　Grease is indispensable for SKF bearings, bearings maintenance without any grease, it was asked, is not to grease the more, the better it? the answer of course is no, bearing grease should be aware of the following issues.
　　Spherical plain bearing in maintenance, excessive greases have a lot of harm. Due to the grease has good adhesion, wear resistance, temperature resistance, corrosion resistance and lubricity, progress in high temperature oxidation resistance of, slow down aging, dissolves carbon knot to prevent metal debris and oil together and progressive mechanical wear resistance, pressure resistance, and corrosion resistance.
　　If grease filled more friction torque is higher. Same amount of padding, sealed bearing friction torque greater than open bearings. Grease filling quantity is proportional to the SKF bearing internal space volume of 60%, the friction torque is no longer significantly increases. This is because open the grease in the bearing large departments had to crowd out, grease in the bearings and seals also has lost reason. Grease filling increases, progress of bearing temperature rise in a straight line, the same amount of padding, sealed bearing temperature rise is higher than the open bearings. General, sealed move bearing grease fill volume, maximum internal space of about 50%. Shawki and Mokhtar's tests showed that ball bearings at 20% per cent of the most affordable.
　　An SKF bearing accuracy and speed are the most important, they detail what is meant by that, to describe bearings.
　　Bearing precision:
　　High running accuracy of the bearing arrangement (such as machine tool spindles) and the application for high speed operating conditions should use precision bearings of higher than normal. Can provide a variety of high-precision bearings, including single row angular contact ball bearings, single row and double row cylindrical roller bearings, single and double direction angular contact thrust ball bearings
　　Spherical plain bearing speed
　　Moving speed of the bearing are promised operating temperature limits. SKF bearings for low friction, the internally generated heat is lower so that the most used in high speed conditions. Deep groove ball bearings and self-aligning ball bearings under purely radial load, or angular contact ball bearings under combined load, compared to other bearings can withstand high speeds. Precision angular contact ball bearings with ceramic moving body or deep groove ball bearings, can achieve even higher speeds. For design reasons, thrust bearing speed cannot be as high as radial bearings.  

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