P25系列回转油缸是为数控车床配套而设计的。该油缸分为有安全阀和没有安全阀两种结构。安全阀可以防止因液压系统故障等原因而引起的油缸输出推（拉）力急骤下降，可确保加工安全。具有外形尺寸小、重量轻、通孔和转速适中、性能可靠等特点，各项指标均能满足一般数控车床的需要。

P25 series through hole rotary cylinders are designed for matching NC turning lathes into complete sets. The cylinders are divided into two sets, which are equipped with pressure safety devices or without them. The pressure safety devices can help to retain the draw bar pulling force in the event of a breakdown of the hydraulic system. They are with feature compact construction, light weight, moderate center hole and speed, reliable performance, and meet requirements of NC turning lathes.