WORKED EXAMPLE - CALCULATING HERTZIAN PRESSURE

 

A 2 tonne load is placed 600mm from the point of suspension. The bearings are spaced 500mm apart.
Which bearings should be used?

Using the Moment-Balance formula: C = (P . L) / (2 . I)

where:
P = The load being moved (N)
L = Distance between the load (P) and the suspension point (mm)
I = Distance between the bearings (mm)
C = Maximum allowable static force per bearing (N)

Assuming the bottom pair of bearings are level with the point of suspension then I = 500mm. The load is cantilevered out at 600mm and hence this is the value of L. Here P is 20000N.

Substituting these numbers into the equation gives
C = 12000N

Looking up this value of C on the Hertzian Pressure table shows that 4.058 is the required bearing size.

Why not use our new Online Calculator to double check?

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

 

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