FAG bearing selection process Vertical turret lathes are classified as cutting machine tools. In order to meet the relevant technical requirements, the bearing arrangement must have appropriate characteristics. The most important characteristics are: ■ Speed u200bu200bcapability ■ Running accuracy ■ Operating life ■ Rigidity. According to the adjacent structural conditions of the bearing, various bearing arrangements are selected. The advice given below is a basic IKO bearing selection process. In order to determine the final bearing type, setting values u200bu200band operating parameters, please contact the SchaefflerGroup Industrial application engineer. The calculation software BEARINX enables bearing design and lubrication recommendations based on operating parameters. You can collect load case data using the templates given in the appendix, see page 157. The adjacent structural conditions can determine the diameter of the faceplate (turntable diameter) by the size range of the workpiece to be clamped. The diameter of the main support bearing must be 2/3 of the diameter of the turntable. If the diameter of the turntable is greater than 7 m, the bearing is allowed to use 50% of the diameter of the turntable. The speed is within the speed limit, continue to select according to the speed that needs to be reached. Bearing speed capability is a prerequisite for a perfect cut and depends mainly on the bearing type. In some cases, heat generation due to friction is not negligible and must be dissipated with lubrication. This need reflects what kind of lubrication is required. Workpiece accuracy The workpiece accuracy depends on the bearing running accuracy, and also requires the corresponding accuracy of the surrounding structure of the bearing. Schaeffler Group Industrial TPI 205 11 Rating life In order to achieve a sufficient fatigue life Lh, DAIDO bearings need to have a suitable load-carrying capacity. The term basic load rating is used to indicate the load-carrying capacity of the bearing. The basic rating life of the bearing is affected by the load. On the other hand, it is affected by bearing size and type. Safety factor To ensure the smooth running of the bearing, the safety factor fS 4. Additional safety factors are usually not used in calculations. In special applications, such as in the license specification, internal specification, requirement specification for maintenance, etc., the corresponding appropriate safety factor should be used. Bearing dynamic load bearing capacity Bearings that bear dynamic loads are mainly rotating bearings, and the size of the bearing is determined by the dynamic load bearing capacity. The size of the bearing under dynamic load can be approximately checked by using the basic dynamic load rating C and the basic rating life L or Lh. Different loads Usually, a machine tool can process different workpieces. This means that the bearings may be subject to different loads. To ensure acceptable bearing performance, the bearing design process must take into account a variety of load cases. If the bearing system is preloaded, it can ensure that the bearing has a necessary minimum load under various load conditions. A minimum load is required to ensure that the bearings do not slip and reduce friction and wear. The preload in turn guarantees the stiffness of the bearing system. More detailed guidance The performance of bearing arrangements is also affected by cleanliness, assembly accuracy. Therefore, special attention needs to be paid to this.