tender for purchase for the spares / job work elecon make secondary motion three stage helical gear box with complete refurbishment work.= 1 complete refurbishment with internal design, manufacture, supply, fitting, erection and commissioning with trial for elecon make secondary motion three stage helical gear box.model no.scn-560 hp=600 ratio=20:1 sr.no.14972rdthe detail of internal parts to be replaced is as under:-a ) 1st intermediate pinion with shaft 2 b ) 2nd intermediate pair ( i.e pinion & wheel ) with shaft 3 c ) input pinion shaft all three bearings. ( i ) bearing no.23222e make-skf / fag imported 4 ( ii ) bearing no.nu2222 make-skf / fag imported 5 d ) 1st intermediate pair bearings.bearing no. 22326make-skf / fag imported 6 e ) 2nd intermediate pair shaft bearings. bearing no.22338 7 f ) 3rd intermediate pair shaft bearings.bearing no.23056 8 job work for above reduction gear box as under:- a ) reversing of output wheel 9 b ) repairing and boring of casing to match bearing size after its engineering.