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You can use the following chart to determine the correct bearing diameter according to operating speed and load amount.
Application range of the bearings is defined by calculating the specific radial load (p) and surface velocity (v):
For a good bearing design, accepting p = 1.8 / v , you can calculate the correct diameter with below formulas:
p = F / d x b ( N / mm 2 )
v = d1 x p x n / 60.000 ( m / s )
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