Kolkata Municipal Corporation

Kolkata Municipal Corporation has published Heat Vernishing, Repairing Of Stator And Metalizing Of Defective Rotor Shaft, Slip Ring And Bearing Housing Of 70 Hp, 52.5 Kw, 3Ph, Slipring Motor Of Pump Unit B And Supply Fitting Fixing Of Nde Bearing Of Pump Unit D At Clps Under Bdps.- 1 Demounting the motor from sole plate and placing the same on the available working floor by using disconnection of LT cables from the motor terminals, space heater terminals etc. and decoupling the motor from pump with care and caution and complete in all respect as per direction of the Engineer-in-charge. 2 Taking out the rotor from the stator after necessary measurement/ dimension and placing the rotor on a pedestal at the available working floor by using department overhead cranes etc. care and caution and complete in all respect as per direction of the Engineer-in-charge. 3 Thorough cleaning of stator winding from dust dirt loose particles etc. by suitable brush, compressed air and subsequent heating and cleaning with petroleum based suitable organic as per specification & direction of the Engineer-in-charge. 4 Cleaning of dust by suitable brush, compressed air from rotor winding and subsequent heating and cleaning with petroleum based suitable organic as per specification and direction of the Engineer-in-charge. 5 Taking out ball/ roller bearing from the rotor shaft by puller arrangement with proper care and caution as per direction the Engineer-in-charge. 6 Supplyof the new NU 318 ECP/C3 roller bearing make: SKF in proper position as per direction of EIC. 7 Fitting and fixing of new NU318ECP/C3 roller bearing make: SKF in proper position as per direction of EIC. 8 Heat varnishing of stator winding with two coat of Dr. Beck HTF-50 varnish and subsequent heating to suitable temperature till requisite result is obtained to get the satisfactory IR value. 9 After thorough cleaning the rotor from dust dirt etc. heat varnish of the rotor motor with two coats of the Dr. Beck HTF-50 varnish and subsequent heating to suitable temperature till requisite result is obtained and complete in all respect with proper care and caution as per direction the Engineer-in-charge. 10 Assembling the motor after inserting the rotor into stator vary carefully including fittings of bearings for DE and NDE side maintaining the proper air gap. 11 Dismantling the slip ring carefully with special tools and tackles. 12 Metalizing, machining and rebrazing of the slip ring and machining the same and match. 13 Fitting and fixing of the slip ring in proper position as per direction in charge. 14 Supply & Fitting fixing of bronze carbon brush holder as per given sample. 15 Supply & Fitting fixing copper carbon brush in good quality as per given sample. 16 Replacement of damage slipring shorting mechanism as per given sample. 17 Placing the complete motor on the sole plate and tightening the foundation on bolts, fixing the dowel pins and complete in all respect 18 Statutory requisite pre-commissioning high voltage test, IR measurement of IR value should be done by the party and test report should be produced in due course. Making the LT connection of the respective terminals of the motor and earthing should be done properly. 19 Cutting the damage portion of 95 sq.mm. 3 core cable and finishing the end of the cable by cramping method including fixing of dowel solderless sockets, tapes and other jointing materials. 20 Metalizing of bearing house both side (de & nde) and machining the same and match with the bearing house. 21 Rebrazing the both end stator joints with end of the bearing house. 22 Metalizing of shaft journal both side (de & nde) and machining the same and match with the bearing bore. 23 Rebrazing the both end rotor joints with end rings. 24 Dismantling of the motor from its base plate along with unit separation work of the motor, stator, rotor and other components should be placed carefully on the wooden block including disconnecting the electrical connection from the terminal. 25 Supply a new angular roller bearings (NDE-7322 BECBM) for CLPS D motor. 26 Fitting and fixing of new angular roller bearings (NDE-7322 BECBM) for CLPS D motor. 27 Reassembly the motor with stator, rotor and other parts and also the electrical connection has to be made after setting down the motor for CLPS D motor. 28 To and from transportation of motor from the pump house to party’s works and back to pump house. . Last date of submission for this tender is 2025-08-02. This is a Mechanical Engineering Service tender in Kolkata, West Bengal