Hub rough mill is installed at the rear part of hub hydraulic press, for rolling wheel hub and other ring shape component, it is capable of making ring shape half product which is after hole drilling and pressing, and then transfer to finish rolling machining. Finish hub rolling machining is installed after rough rolling mill, for finish rolling machining ring shape component. While wheel rolling machine is used for rolling wheel spoke , which makes the diameter of part reach hot forging component standard, and shape rim, flat surface and flange.

Slab type rolling mill can be categorized into two kinds as per its function; one is TCL-U1900 hub roughing mill, the other is TCL-J2500 hub rolling mill. Wheel rolling mill can be categorized into 7 roller horizontal wheel rolling mill and vertical DRAW wheel rolling mill.

NHI started self design and fabrication of hub rolling mill from 1960s, which is the first set of big equipment successfully installed and commissioned in China, which is rewarded by national tech conference medal on hub rolling mill in 1978. In November of 1977, rewarded by Key science and technology, for hub rolling mill, we already supplied 2 sets, one is for MAANSHAN steel company, which is mature technology, reliable quality , already used for many years. The other one was exported to north Korean in 1996. Now , NHI has mature technology in hub rolling mill, we are the only supplier who is independent in technology developing and fabrication of hub rolling mill.