与ISO 4254-1一起使用的ISO 4254-12:2012规定了用于旋转式割草机，旋转式割草机的设计和制造的安全要求及其验证，仅用于农业中的饲料作物收割机，仅用于农业的水平轴，安装，半安装，拖车或自走式。描述了在正常运行和服务过程中，一个人（操作员）消除或减少因预期用途引起的危害和合理可预见的误用这些机器的方法。此外，它还规定了制造商提供的有关安全工作实践的信息类型。 包括一个水平轴的割草机，只有出于维护原因才能在后部打开。 ISO 4254-12:2012也适用于配备调理装置的割草机，仅适用于在地面上工作的割草机。 ISO 4254-12:2012与ISO 4254-1一起处理与旋转式割草机，旋转式割草机和连枷割草机相关的所有重大危险，危险情况和事件（噪音和振动除外），当它们按照制造商合理预见的误用条件使用。 它

ISO 4254-12:2012, where used with ISO 4254-1, specifies the safety requirements and their verification for the design and construction of rotary disc mowers, rotary drum mowers, as used for forage crop harvesting in agriculture only, and flail mowers with a horizontal axis for use in agriculture only, that are mounted, semi-mounted, trailed or self-propelled. It describes methods for the elimination or reduction of hazards arising from the intended use and reasonably foreseeable misuse of these machines by one person (the operator) in the course of normal operation and service. In addition, it specifies the type of information on safe working practices to be provided by the manufacturer. Flail mowers with a horizontal axis that can be opened at the rear only for maintenance reasons are included. ISO 4254-12:2012 is also applicable to mowers equipped with a conditioning device and only to mowers intended to work at ground level. ISO 4254-12:2012, taken together with ISO 4254-1, deals with all the significant hazards, hazardous situations and events (with the exception of noise and vibrations) relevant to rotary disc mowers, rotary drum mowers and flail mowers, when they are used as intended and under the conditions of misuse that are reasonably foreseeable by the manufacturer. It is not applicable to flail mowers that have the rear part which can be opened for particular field use operations, mowers with an articulated arm, mowers with one or more vertical axes designed for mulching, pedestrian-controlled motor mowers, lawn mowers, inter-row mowing units and machines specifically designed for highway and road maintenance.