Design and Safety Guide for FAG Thrust Ball Bearings

FAG Thrust Ball Bearing Design and Safety Guidelines Thrust ball bearings can only withstand axial loads. For complete bearing arrangement calculations, the engineering service department of Qingdao Ruijing Mechanical and Electrical Equipment Co., Ltd. should be consulted. Equivalent dynamic bearing load For bearings subjected to dynamic loads, the following formula applies: P kN bearing equivalent dynamic load Fa kN bearing axial dynamic load. Equivalent static bearing load For bearings subjected to static load, the following formula applies: P0 kN Equivalent static bearing load F0a kN Bearing axial static load.

  Minimal axial load During high-speed operation, harmful rolling motion occurs between the rolling elements and the raceways due to centrifugal forces and gyro moments. In order to avoid slipping, SLF bearings must withstand a minimum load Fa min. The minimum load factor A is given in the dimension table. For nmax, the maximum operating speed must be used. Fa min kN Minimum axial load A - Minimum load factor, see size table nmax min–1 Maximum operating speed. Speed ​​ISO 15312 does not give a hot reference speed for a thrust ball bearing. The oil speed limit speed is given in the dimension table.

  Bearing arrangement design In order to give full play to the performance of the bearing, the adjacent structure must have a suitable design. Shaft and housing tolerances For one-way thrust bearings, shaft tolerances should be j6. The positioning hole tolerance depends on the required running accuracy. For common running accuracy, tolerance zone E8 should be selected; for high running accuracy, tolerance zone H6 should be selected. The user-customizable solution can be implemented through the agreement. The shoulders of adjacent structures adjacent to each other must be high enough to effectively support more than half of the height of the shaft ring and seat ring of the KBC bearing. The purpose of this is to achieve centering of the main shaft and bearing housing. Adjacent shoulders must be rigid, flat, and perpendicular to the axis of rotation. The maximum radius ra and the mating surface diameter da, Da, see the dimension table. Accuracy Dimensions and Geometrical Tolerances The primary dimensions of one-way thrust bearings conform to ISO 104 or DIN 711, see the dimension tables.