Rotary table is one of the driving equipments of drilling rig. It is mainly used for rotating drill string during drilling service and supporting the weight of down-hole drill string (or casing) during trip in & out and casing running, usually used in combination with drilling rig and workover rig. This equipment has put into production in batches with advanced quality in domestic market, and exported to some countries and areas such as USA, Canada, Central Asia, Southeast Asia, etc. A series of 75,105,175,205,275 and 375 rotary tables have been successfully developed,