repairing of electric winding engine with providing all types of materials and consumables items at 3 4pit of shankarpur colliery-3 dismantling of the gear pinion by proper arrangement with related components jig and fixture 4 making proper arrangement for dismantling the 1st motion and 2nd motion pinion by opening attachment of bolt and nut key way 5 materials taken out from winding room 6 pinion bore grinding for preparation of welding 7 bore welding applying by using 1st layer l and t make 4mm electrode eutectrode 27 6 kgs. x @ rs.2400/- 8 bore final welding applying by using l and t make 4mm electrode xyrone 224 11kgs. x @ rs.10000/- 9 bore all welded portion machining by line boring machining by special arrangement 10 pinion teeth cutting by hobbing machine 11 new key way making cost 12 1st motion main shaft g.m. bush bearing new making (with pattern cost) box making cost jabri making cost moulding making both side 112 kgs. x @ rs.640/- per kg. = rs.71,680/- for 1 set, so, for 2 sets x @ rs.71680/-