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Materials of FAG bearings

Materials of FAG bearings


The working performance of a rolling bearing depends largely on its material properties. FAG usually uses low-alloy, high-purity overall quenched chromium steel as the material for manufacturing bearing rings and rolling elements. For bearings subject to high shock loads and alternating bending stresses, use carburized steel. In recent years, due to the continuous improvement of the quality of bearing steel (of course, the price is also rising), FAG has been able to greatly increase the bearing capacity of its bearings. Research results and practical experience have proved that the bearings made of standard rolling bearing steel can reach infinite fatigue strength under the conditions of good lubrication, clean environment and low load. The heat treatment process of FAG rolling bearing rings and rolling elements ensures that the bearing is stable in size within 150 degrees.

For higher operating temperatures, special heat treatment methods are required. If the bearing is used in a corrosive environment, the bearing steel needs to be corrosive. Standard bearings made of stainless steel add the prefix "S" and the suffix "W203B" to the designation. The main dimensions and load carrying capacity of this bearing are the same as the integrally hardened steel bearing. In order to maintain its corrosion resistance, its surface must not be damaged during installation and use. FAG produces silicon nitride balls for ceramic spindle bearings. Ceramic balls are much lighter than steel balls, and their centrifugal force and friction are significantly smaller than steel balls. These bearings can still reach extremely high speeds when grease lubricated, and have a long service life and low operating temperature.

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