Bearing loadcalculation

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Bearing loadcapacity

Equivalentbearing loadformula

Table 5-9 describes the calculation of the dynamic equivalent load when radial loads and external axial loads (Ka) are applied to bearings.

Bearing loadcapacity chart

Bearings are used under various operating conditions; however, in most cases, bearings receive radial and axial load combined, while the load magnitude fluctuates during operation. Therefore, it is impossible to directly compare the actual load and basic dynamic load rating. The two are compared by replacing the loads applied to the shaft center with one of a constant magnitude and in a specific direction, that yields the same bearing service life as under actual load and rotational speed. This theoretical load is referred to as the dynamic equivalent load (P).

What is radialloadon abearing

CR Seals, ensuring high performance and service life in industrial and automotive shaft seals, presents a comprehensive range of seals, such as Axial (V-Ring, Axial Clamp, Metal-Cased V-Ring Seals), Hydraulic (Piston, Rod, Wiper Seals, Guide Rings, Back-up Washers), Metal Face (Heavy Duty Dual Face Seals), and Rotary Shaft (Radial Shaft, Radial Shaft Flanged Seals).

Thrustload bearing

Dynamic equivalent loads for radial bearings and thrust bearings (α≠90°) which receive a combined load of a constant magnitude in a specific direction can be calculated using the following equation,

Established in 1878 as Chicago Rawhide, CR Seals highlights one of the longest histories in the seal industry. As a subsidiary of the SKF brand, CR Seals offers a diverse array of radial and axial sealing solutions for power transmission applications.

When load magnitude or direction varies, it is necessary to calculate the mean dynamic equivalent load, which provides the same length of bearing service life as that under the actual load fluctuation. The mean dynamic equivalent load (Pm) under different load fluctuations is described using Graphs (1) to (4). As shown in Graph (5), the mean dynamic equivalent load under stationary and rotating load applied simultaneously, can be obtained using equation (5-39).

[Remarks]1. These equations can be used when internal clearance and preload during operation are zero.2. Radial load is treated as positive in the calculation, if it is applied in a direction opposite that shown in Fig. in Table 5-9.

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