de shelling 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 31x60 , 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 molybdenum chromium 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 .