supply of reshelling of rollers to various co-operative and corporation sugar mills in uttarakhand in the year 2024-25 , reshelling of mill rollers reshelling of mill rollers with special manganese and silica alloy mixture, hard coarse grain non-polishing cast iron shell having the hardness 200 to 210 bhn, shrunk fitted on the roller shafts (to be provided by the mills) duly machined but ungrooved as per drawing (to be provided by the mills). the composition of shell material should conform to is-11201-1985 and shall contain :- total carbon 3.20% to 3.60%, manganese 2.20% to 3.20% phosphorous 0.50% maximum , sulphur 0.15% maximum, silica 1.20% to 2.20% , without scrap: top roller , 28”x56” , 30”x 60” , 33”x66” , 36x66.92 , without scrap:feed/discharge roller , 28”x56” , 30”x 60” , 33”x66” , 36x66.92 , reshelling with scrap (after adjusting the scrap of old shell) , with scrap: top roller , 28”x56” , 30”x 60” , 33”x66” , 36x66.92 , with scrap: feed/discharge roller (with ci rings) , 28”x56” , 30”x 60” , 33”x66” , 36x66.92 , with scrap: feed/discharge roller (with m.s.rings) , 28”x56” , 30”x 60” , 33”x66” , 36x66.92 , reshelling of lotus roller , without scrap , 28”x56” , 30”x 60” , 33”x66” , with scrap (after adjusting the scrap of old shell) , 28”x56” , 30”x 60” , 33”x66” , charges of extra diameterper 10 mm increase in diameter , 28”x56” , 30”x 60” , 33”x66” , grooving charges including meschart grooves , ½” and upto 1” , 28”x56” , 30”x 60” , 33”x66” , above 1” and upto 1.1/2” , 28”x56” , 30”x 60” , 33”x66” , above 1.1/2” and upto 3” , 28”x56” , 30”x 60” , 33”x66” , machining of roller shaft (after adjusting the turning scrap) , 28”x56” , 30”x 60” , 33”x66” , journal polishing of roller shaft , 28”x56” , 30”x 60” , 33”x66” , reshelling of semi couch roller with scrap size 30x60 , fitting of nozzles in semi couch roller size 30x60