... roll surface: φ180×350, Material: 9Cr2Mo, Bearings: compound tiles, needle bearingb. Roller bearing track× roller surface width: φ350×320mm, Material: 9Cr2Mo, Bearings ... : exclusive use of FCD mill bearingsc. Lubrication way of bearing: Grease lubricationd. Support-roller balance way: hydraulic balancee. Roller changed ...