ZWZ is the only one in China bearing industry, who can supply railway bearings for wagon, passenger coach, locomotive and subway rolling stock. ZWZ has more than 200 customers in China railway industry and sales revenue in 2007 is 500million RMB. ZWZ has all necessary manufacturing facilities from forging to assembling. For wagon tapered roller bearings, ZWZ has two high precision grinding lines and automatic assembling line.Forcylindrical roller bearings, the fine grinding machines are all imported from Japan, Germany, Sweden and Italy. The heat treating line is with protective atmosphere. Except for newbearings, ZWZ also has a factory for produce reconditioning bearings.
Taper roller thrust bearings enable axially very compact bearing arrangements to be produced which can carry very heavy axial loads, are insensitive to shock loads and are stiff. Cylindrical roller thrust bearings are suitable for arrangements that have to support heavy axial loads. Furthermore, they are relatively insensitive to shock loads, are very stiff and require little axial space. As standard they are available as single direction bearings and can only accommodate axial loads acting in one direction.