deshelling and reshelling de-shelling and re-shelling of mills rollers , de-shelling & re-shelling of mills rollers de-shelling , re-shelling & grooving of old shaft of mill shrink fitted on old shaft . material of shaft should be coarse grain as per is: 11202 with following specification:- hardness 180-210 bhn grooving will be as per drawings , size 30 x 56 , size 30 x 56 ( lotus + semicouch ) , size 31 x 60 , the composition of the shell should be total carbon 3 . 2 to 3 . 6 % max manganese 2 . 2 to 3 . 2 % max . silicon 1 . 2 to 2 . 2 % max phosphorus 0 . 5 % max sulphur 0 . 15% max grooving details shall be provided along with the order . the shell of the roller should be shrink fitted on our shaft after ultrasonically testing of roller shaft . test report for every shaft should be submitted . roller journal polishing shall be done for all the rollers , juice rings will be provided by the party .