procurement of roller assembly without geared motor of roller screen installed at 1x500 mw chp ii sgtps mppgcl birsinghpur , roller assembly without geared motor assembly comprises of:- ( i ) 1 no. roller shaft with key & allen screw ( 45c8, is:1570 ) ( ii ) 1 no end disc ( en 19 ) ( iii ) 21 nos roller disc ( en 19 ) ( iv ) 2 no. skf make bearings ( bs-2210-2cs / 2rs ) ( v ) 2 nos bearing housings with end covers and screw ( vi ) 2 nos labyrinth rings ( vii ) 1set of 3 nos spacers, 4 nos check nuts & 4 nos lock washers ( viii ) 1set of 2 half coupling coupling along with 8 nos coupling bolts & nuts with neoprene rubber bushes