Use the calculator to find the reaction (radial) load carried by each bearing in a two-bearing shaft.
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Bearing Load Formula

The following formula is used to calculate the bearing load acting on two bearings in a radial shaft system.
R1 = L2*P/(L1+L2)
R2 = L1*P/(L1+L2)
- Where R1 and R2 are the radial loads on bearings 1 and 2, respectively
- P is the radial shaft load between the bearings
- L1 and L2 are the distances from the bearings to the radial shaft load
Example Problem
How to calculate bearing load?
First, determine the radial load acting on the shaft. For this example problem, the radial load is 400 N.
Next, determine the distance from bearing 1 (the further bearing) to the radial load point. For this problem, the distance is found to be 10 meters (L1 = 10 m).
Next, determine the distance from bearing 2 (the closest bearing) to the radial load point. This is measured to be 5 meters (L2 = 5 m).
Finally, calculate the bearing load for each individual bearing.
R1 = L2*P/(L1+L2)
= 5*400/(15)
= 133.33 N.
R2 = L1*P/(L1+L2)
= 10*400/(15)
=266.67 N
