PWHZ系列回转减速机主要用于液压汽车起重机、屦带式起重机、铁路起重机、舰船甲板、码头和集装箱起重机的回转机构，即使在比较恶劣的使用工况下也能展示其完美的性能。
PWHZ series slewing reducers are mainly used for slewing mechanism of hydraulic truck crane, belt crane, railway crane, ship deck, wharf and container crane, which can show its perfect performance even under relatively bad working conditions.
其传动部分每级传动均有若干个行星齿轮，这样不仅达到均载目的，而且提高了承载能力;齿轮材料均选用高合金钢，外齿轮表面经渗碳淬火，磨齿工艺处理，内齿轮调质、并渗碳处理，不仅有很高的可靠性,而且有很长的使用寿命。
The transmission part has several planetary gears in each stage of transmission, which not only achieves the purpose of load sharing, but also improves the bearing capacity; the gear materials are all high alloy steel, the outer gear surface is carburized and quenched, the gear grinding process is treated, and the inner gear is quenched and tempered, and carburized, which not only has high reliability, but also has a long service life.
