Roll body: adopt ht-300 cast iron to cast inside and ouside, thickness:100mm the thickness of the finished product wall is 80mm Cylinder head: adopt zg270-500 cast iron to cast and temper. Shaft diameter lathe:1:12 use hydraulic pressure Finished products according to drawings after the whole body is hot charged and bolt fastened by 8.8 grade m30�140 hexagonal head bolt Roll body dynamic balance: accuracy grade g2.5.Speed of dynamic balance is 300 m/min (add mass method) Thickness: unilateral thickness: 25mm Hardness: 982 The type of rubber surface: zt-ppp- i, 2 The performance of rubber surface: high friction coefficient, chemical resistance, good abrasion resistance, high stability. Zhongtian rubber roll manufacturing co., ltd.(all kinds of rollers for papermaking machine)