tender for repairing emergency maintenance work of central bearing for clariflocculator bridge no. 2 with supply of central pivot slewing with trunnion arrangement comprising of slewing ring assembly made from cast steel is 2707 gr-i all over machined, grind finished with hardening up to 240 bhn fitted with chromium steel ball of 38 mm diameter complete with grouting bolts & nuts, top earing plate with mounting bracket to suite the bridge assembly, bottom adopter plate 12 mm thick, guide pipe for current collector mounting and 60 mm diameter pin for pin joint including necessary steel scaffolding/ jack arrangement for lifting the bridge and replacement of the same in proper position, complete in all respect as per drawing.