Roll body: adopt ht-300 cast iron to cast inside and outside; thickness: 120mm; the thickness of the finished product wall is 100mm Cylinder head: adopt zg270-500 cast iron to cast and temper. Shaft diameter lathe:1:12 use hydraulic pressure To produce finished products according to drawings after the whole body is hot charged and bolt fastening by 8.8 grade m30140 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: 20-22.5mm The type of rubber surface:zt--pps 2 Hardness: The performance of rubber surface: high friction coefficient, chemical resistance, , good abrasion resistance, medium temperature 80, acid and alkali resistant Blind bore on roll surface; bore diameter: 3mm; bore depth: 7-9mm; a double helix arrangement; aperture ratio: 22-24%. Zhongtian rubber roll manufacturing co., ltd.(all kinds of rollers for papermaking machine)