Moment-Balance Calculations
The location of the bearing with respect to the suspension point is critical in determining the force seen by it. The Hertzian static load capacity of the chosen bearing must not be exceeded and this therefore limits the maximum allowable load.
Using moment-balance, the bearing distance can be calculated from: I = (P . L ) / ( 2 . C) where: P = Weight of the load being moved (N) L = Distance between the load and P, the suspension point (mm) I = Distance of bearings from the suspension point (mm) C = Maximum allowable static force per bearing, determined by Hertzian Pressure
Alternatively, this formula may be rearranged to calculate the static force generated C = (P . L) / (2 . I) and this value of C can then be compared with those given in the Hertzian Pressure data to determine which bearing is best suited to the loading conditions. |
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