The openable mill housing consistes of casting mill housing frame and casting cover, 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, gear distributer, gear reducer,main drive motor,etc.; 
Mill stand body is mainly composed of: casting openable  mill housing,roller system, underneath type roll gap adjusting components, etc; According to different roll berel diameter,  the mill stand is divided into 550, 520, 450, 400, 365, 325, 280, 250, etc.;