P25系列回轉(zhuǎn)油缸是為數(shù)控車床配套而設(shè)計(jì)的。該油缸分為有安全閥和沒(méi)有安全閥兩種結(jié)構(gòu)。安全閥可以防止因液壓系統(tǒng)故障等原因而引起的油缸輸出推（拉）力急驟下降，可確保加工安全。具有外形尺寸小、重量輕、通孔和轉(zhuǎn)速適中、性能可靠等特點(diǎn)，各項(xiàng)指標(biāo)均能滿足一般數(shù)控車床的需要。

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.