This part of ISO 28927 specifies a laboratory method for measuring hand-transmitted vibration emission at the handles of hand-held stone hammers. It is a type-test procedure for establishing the magnitude of vibration in the gripping areas of a stone hammer when operated in laboratory conditions. This Standard applies to engraving pens and stone hammers intended for use by stone masons. The machines covered by this part of ISO 28927 may be pneumatically driven, or driven by other means. Typical machines are illustrated in Figures 1-4. This part of ISO 28927 applies to the machines mentioned in clause 5. It does not apply to demolition hammers or to chipping hammers primarily intended for use on metal or in construction. It is intended that the results can be used to compare different models of the same type of machine.