mill top roller shaft with cast iron dummy shell mill top roller shaft with cast iron dummy shell mill top roller shaft with dummy sl. no. item description 1 mill top roller shaft with dummy c.i shell for 2nd to 4th mill use (sil mill size : 33 x 66) as per drawing nvmvers mh - 22/2020/rev.1 for shafmh - 17/2020/rev.1 for shellmill roller shaft ifaction material : forged steel ( normalized)quality : 40 c8 (c40)is code for material is1570_ part ii -1979 minimum tensile strength: 58 kg/mm²elongation :20% fillet radius : 8mm between the jarnal and the shaft shall be provided .drawing no : mh-22/2020/rev:1 note: the shaft should be subjected to be following test and certificate to be enclosed along with the supply. ultrasonic test as per is 8791-1978 die - pertrating test as per is 3658-1981 magnetic particle test as per is 7743-1975hardness and tencile strength testthe shaft should be dully machined as oer the drawing and the journals shall mirror finished to enage white metal/ gun metal bearing raw material for the shaft should be purchased from for sed steel shaft mill roller cast iron dummy shell drg .no mh -17/2020 specification of summy shellcoarese grain cast iron having hardness 180 - 210 bhncompostion of c.i shell materialas per is 11201 - 1985total carbon : 3.2%to 3.6% suiphur : 0.15%(max) manganese: 2.2% to 3.2% silicon : 1.2% to 2.2% hardness : 180 to 210 bhn shrunk rings description of material : mild steel is 2062shrunk ring must be heated to be temperature 370° and shrunk on bolt sides on the shaft and fixed to be face of the roller shell note : the supplied shaft with shell should serve for a minimum two continous crushing seasons or 24 monthsfor quality work manship and quality of material with satisfactory performance. if any failure occurs on the supplied material within the two crushing season or 24 months it should be replaced immediately at free of cost . credentials required as supplied in the previous years at various mills.