procurement of gear couplings and spares for resilient coupling of xrp1003 coal mill and coupling of seal air fan installed at 1x500 mw unit sgtps mppgcl birsinghpur , spares of gear coupling , gear coupling 40gfs suitable for coal mills xrp 1003 ( as per agma standard ) in finished bore condition worm shaft side: ( geared hub with bore dia 114.3 mm ) keyway dimension: width: 25.4mm, depth: 12.74mm cardon shaft side: ( plain hub with bore dia 75 mm ) material: 1 ) hub mill end-bs170, en-19 2 ) hub cardan ( mill end ) -bs-170, en-8 3 ) sleeve-bs170, en-19 , spares bolts & nuts suitable for 40gfs gear couplings ( alloy steel duly hardened & tempered ) , 08 nos. / set ht bolts- gr 10.9, nuts: std is 1363 , spares of resilient coupling , resilient coupling-366fx along with coupling cover , spares grid spring suitable for 366fx resilient coupling ( alloy steel duly hardened & tempered ) , 02 nos. / set , spares bolts & nuts suitable for 366fx bibby coupling ( alloy steel duly hardened & tempered ) , 08 nos. / set ht bolts- gr10.9 nuts-std. is1363 , spares of seal air fan coupling , resilient coupling r-9, 10 hs resoflex id ( finished bore ) fan side: 70mm motor side: 75mm ( fan model no. ndfv 12.5h ) material: hub motor end- bs170, en-8, hub fan end: bs170, en-8 , spares grid spring suitable for above resilient coupling r-9, 10 hs ( alloy steel duly hardened & tempered ) , 02 nos. / set