e-NIT No. WBIW/EE/MMED/e-NIT- 01/2026-27 Sl.No.02

Servicing of headstock assembly i.e. opening the hand wheel from screw rod, including opening the thrust bearing from top and bottom thrust plate of bearing housing, nut, coller etc and cleaning all the components with the help of Kerosine and emery paper and re-fitting the same including changing necessary nuts & bolt after greasing the thrust bearing if Ok otherwise replaced by new one (excluding the cost of bearing, supplied separately) and fileing work if required for fixing to the pedestal upto the satisfaction of E.I.C. The cost includes cost of materials, man power employed, kerosene, grease, consumables like emery paper, cloths, bolts & nuts, hire charges of tools & tackles etc.

a) Bearing no.51213 (SKF)(Thrust bearing)

Supplying, fitting, fixing bolts with nuts, washer: (a) Length above 75 mm and upto 150 mm.

Surface cleaning of metal surfaces by chemical cleaners and then by hand with emary paper, wire brush and power tool cleaners and removing dust and preparation of surface including cost of all materials, labour, machinery, scaffolding, etc., complete with initial lead for sand upto 1 km and all lifts.

Painting of embedded parts, all types of gates, stop logs and barscreen/gratings etc on prepared surfaces with one coat of inorganic zinc silicate primer (airless spray preferred)70+/ - 5 micron and two super coats with a total thickness of 300 microns (each 150+/- 5) of solventless coaltar epoxy paint each coat 150 microns ( total 300 microns) including cost of all materials, labour, scaffolding etc., complete with all leads and all lifts.