Greases are indispensable to FAG bearings, FAG bearings of any maintenance be separated from the grease, someone asked, should we do as much grease as possible? the answer is in the negative, of course, the following matters needing attention on rolling bearings using grease.
Rolling bearing in maintenance, too much grease, there are many hazards. Because the grease has very good adhesion, wear resistance, temperature resistance, corrosion resistance and lubricity, capable of improving the high-temperature oxidation resistance, slows aging, dissolves carbon knot to prevent metal debris and oil together and improve wear resistance, pressure resistance and corrosion resistance.
If the amount of grease fill more friction torque is higher. Same amount of padding, sealed bearing friction torque greater than open bearings. Grease fill the equivalent bearing internal space volume of 60%, the friction torque is no longer significantly increased. Which is due to open most of the grease in the bearings is to crowd out, grease in the bearings and seals also has lost reason. As the grease filling increases, ball bearing linear increase of temperature rise, the same amount of padding, sealed bearing temperature rise is higher than the open bearings. Considered sealed rolling bearing grease fill volume, maximum internal space of about 50%. Shawki and Mokhtar′s tests showed that ball bearings to 20% per cent of the most appropriate.
A bearing accuracy and speed are the most important, what do they mean, to rolling bearing is described.
Accuracy of rolling bearings:
High running accuracy of the bearing arrangement (such as machine tool spindles) and the application for high speed operating conditions should use FAG bearings of precision is 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
Speed roller bearing:
Permissible operating temperature limits the speed of rolling bearings. Low friction bearings, the internally generated heat is lower, so that the most suitable for high speed operating 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 rolling elements or deep groove ball bearings, can achieve even higher speeds. Due to design reasons, thrust bearing speed cannot be as high as radial bearings.