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The standard lifting chain assemblies are illustrated below. The chains, clevis hook, shorteners and lugs are all individually tested then the whole sling tested and certified. They should never be welded in any way and should be replaced should there be any sign of distortion, excessive wear or damage.
The Hammerlocks are equipped with a stress pin linkage. Any sign of the hammerlocks not being able to fold fully, means that the chain assembly has been subjected to excessive stress. In such cases the chain should be sent to an approved testing faility, for re-certification and replacement of all damaged parts.
Chains should not be switched from one macine to another as they may vary between one unit and another in length and size.
Chains should be proof tested annually. Steelbro recommends that inspection certificates be retained for history.
