Dryer roller structure material

At present, the majority of our dryer manufacturers use dryer roller material is not standard, the technical staff to solve the problem of the dryer roller structure materials conducted a series of studies, the following is the actual parameter data

dryer roller material for casting, should not be less than JC/T401.2- 1996ZG340- 640regulations. Castings shall be normalized, after processing roller surface shall be not less than 190HB. If for the forging, material shall be not less than GB/T699- 1999on 55steel forging provisions, forging shall be normalized, after processing the riding wheel excircle surface hardness should be not less than190HB.

dryer roller surface hardness should be higher than the wheel excircle surface hardness, the difference shall be not less than 20HB

dryer roller and the shaft hole of the outer circle of the cylindrical surface coaxial tolerance should be in accordance with GB/T1184 - 1996in 9 class rules Dryer roller processing, idler wheel rim, wheel thickness deviation shall not exceed the design size5%.