Depending on the size, guidance and bearing, compression springs are at risk of buckling.

Articulated spring travel

When guided by mandrel or sleeve, the spring cannot buckle.

Spring guidance over mandrel
Guidance about thorn
Sleeve spring guide
Guide through sleeve

In other cases, it depends on the design of the bearing(EN 13906-1 / 9.14). The spring travel until buckling is referred to as buckling spring travel “sK”.

The following formula is used to calculate the buckling spring travel:

Formula buckling spring deflection

Theoretically, buckling safety is given at “sK /s > 1”.


For more information:


Spring end bearings and buckling limits
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