procurement of spares of gear couplings and resilient coupling of coal mill xrp 1003 and seal air fans for 1x500 mw , sgtps mppgcl birsinghpur , gear coupling for coal mill , gear coupling 40gfs suitable for coal mills xrp 1003 ( as per agma standard ) in finished bore conditionworm shaft side:geared hub with bore dia 114 . 3 mmkeyway dimension:width-25 . 4 mm , depth-12 . 74 mmcardan shaft side:plain hub with bore dia 75 mmmaterial-1 ) hub mill end- bs 170 , en-19 , 2 ) hub cardan ( mill end ) -bs 170 , en-8 , 3 ) sleeve- bs 170 , en-19 , spares bolts & nuts suitable for 40gfs gear couplings ( alloy steel duly hardened & tempered ) , 08 nos . /seth . t . bolts-gr . 10 . 9 , nuts- std . is 1363 , resilient coupling for coal mill , grid spring suitable for 366fx bibby coupling ( alloy steel ( bs:970 en42/45 ) duly hardened & tempered ) , 02 nos . /set , bolts & nuts suitable for 366fx bibby coupling ( alloy steel duly hardened & tempered ) , 08 nos . /seth . t . bolts-gr . 10 . 9 , nuts- std . is 1363 , coupling cover for 366fx bibby couplingmaterial-aluminium , resilient coupling for seal air fan , resilient coupling r-9 . 10 hs resoflexmaterial-hub motor end-bs 170 , en-8 , hub fan end- bs 170 , en-8 , grid spring suitable for resilient coupling r-9 . 10 hs resoflex ( ( alloy steel ( bs:970 en42/45 ) duly hardened & tempered ) , 02 nos . /set