The openable mill housing consistes of casting mill housing frame and casting cover with top adjusting mechanism, tie rod, lock parts, this mill housing has the advantages of low manufacturing cost, easy to use and adjust etc, they are widely used in the steel production line such as middle quality requirement, ordinary rods, rebars, and low construction investment;
Two high openable mill housing stand train consist of: mill stand body, mill stand base frame, universal coupling and its bracket, two gears distributer, gear reducer,main drive motor,etc.; 
Mill stand body is mainly composed of: casting openable  mill housing with top roll screwdown mechanism,roller system, underneath type rolling line adjusting pad, etc;  According to different roll barrel diameter,  the mill stand is divided into 550, 520, 450, 400, 365, 325, 280, 250,etc