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Double Shear figures serve mainly to compare the relative strengths of different types of pin, or different diameters of the same type of pin. The conditions prevailing in a given application usually differ from test conditions. The test itself is carried out according to ISO 8749 and records the maximum load the pin will withstand before fracture. In practise, manufacturers’ figures provide the minimum load without any safety margin.
It is important to note that figures given based on testing to ISO 8749 do not allow for the effect of dynamic (shock) loads or bending moments. Specifically the test stipulates the following restrictions: -
Consequently shear figures are a design guideline and not a guarantee of performance. The figures given elsewhere in this catalogue are for double shear applications. Where a pin is used in single shear, the values should be halved.
Where an engineering application includes conditions that are not covered by the ISO 8749 test, the following guidelines may be used.
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