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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.

Worked Example

If you need help with any of these calculations, call Gerry or Kate (01908 511733) or email a drawing to: sales@euro-bearings.com

calculating moment for bearings


If your application involves a horizontal telescopic slide then you need the following equations (see diagram on right):

formulae for calculating bearing forces on telescopic slide

Usually CB will be the largest force.

telescopic arrangement of combined roller bearings


Standard Combined Bearings standard cr bearing
Channel / Profile Data
combined bearings catalogue