Equivalent dynamic load of NACHI angular contact ball bearings

When using NACHI angular contact ball bearings, the support point of the bearing must be at the intersection (action point) of the extension line of the contact line inside the bearing and the axis as shown in Figure 2.1. Therefore, the position of the action point of the a value is recorded in the dimension table of the angular contact ball bearing. This is especially important when there seems to be a moment load acting on the bearing. When a radial load acts on an angular contact ball bearing, a component force in the axial direction occurs. This axial component force is obtained by Equation 2.4. (Formula 2.4)Fa': Axial component force (N)Fr : Radial load (N)Y : Axial load factor Due to the influence of this component force, the axial load and radial equivalent dynamic load acting on the bearing are as follows Table 2.2 shows. FrI, FrII : Load applied to bearing I, II (N) YI, YII : Axial load factor of bearing I, II PrI, PrII : Dynamic equivalent radial load of bearing I, II Table 2.2 Angular contact balls used Axial Load and Equivalent Dynamic Load in Bearing Figure 2.1 Axial Component Force of Angular Contact Ball Bearing Fa : External Axial Load (N) XI, XII : Radial Load Factor of Bearing I, II Formula 2.1 and In 2.2, bearing load P refers to pure radial load (pure axial load) with no change in direction and magnitude. However, under actual use conditions, radial load and axial load occur at the same time. In this case, it is necessary to convert it into equivalent dynamic load to calculate the life. Equivalent dynamic load can be calculated according to formula 2.3 (formula 2.3) Pr : Dynamic equivalent radial load (N)Pa : Dynamic equivalent axial load (N)Fr : Radial load (N)Fa : Axial load (N)X : Radial load factor (Table 2.1)Y : Axial direction Load factor (Table 2.1) Note 1) i is 2 for DB/DF type combination, 1 for single row/DT type combination. Note 2) For single row/DT type combination, Fa/Fru0026#1049277;e When Pru003dFr Note 3) When the contact angle is 15, the values u200bu200bof X, Y and e of iFa/Cor not listed in the table are obtained by linear interpolation. Note 4) When using at a high speed (dmn value > 800,000), the centrifugal force acting on the rolling elements in addition to the external load needs to be considered. In this case, please consult with NACHI.