Emergent nature repair works to be executed to the Rotor Assy, Bearing Housing and Shield covers of 695 KW, 11KV Motor unit-04 at WSS Tangnar Stage 2nd.

Amount

Shifting of dismantled rotor, bearing housings and shields of unit-4 to nearby workshop facility and back to site after repairs, in the platform truck to be arranged by the firm with following all SOP’s to ensure its safe transit. The job includes all costs on a/c of hire charges of platform truck, highly skilled labour, belting arrangement etc. required for loading, unloading, handling during transit.

Machining of the deformity of the rotor shaft (125mm dia.) & its rebuilding to its original size as per sample. The job involves all charges on account of handling, gradual metal deposition by suitable means and machining, buffing etc. on lathe and allied tools tackles in order to achieve smooth profile. The job has to be done in intervals allowing sufficient time for the rotor to cool and attain the normal temperature by natural means to avoid its deformation due to overheating, before starting subsequent runs of material deposition

Machining of the deformed bearing housings both DE & NDE sides, by removing its ovality after centering on the lathe. The job then includes rebuilding of the bearing housing by way of metal deposition through suitable means followed by its machining to the original size (as per bearings) to make it perfect fit with the outer diameter of the respective bearings. The work has to be done in intervals allowing sufficient time for the work-piece to cool and attain the normal temperature by natural means to avoid its deformation due to overheating, before starting subsequent runs of material deposition. Further included in the job is buffing of the machined surface of the bearing housing to achieve smooth and abrasion free surface. The job includes all charges on account of gradual metal deposition, machining etc. on lathe and buffing with appropriate buffing tool kit and allied tools tackles required for execution of the job

Reaming of deformed housing holes along with corresponding holes on shield cover so as to ensure proper grip during motor operation and otherwise. The Job includes all cost on a/c of internal threading, tools and tackles, fixtures etc. for successful execution of the job. The job is inclusive adoptable bolts of required length.

Providing/Fitting of New Angular contact ball bearing 7230 B having brass cage of SKF/FAG make to 695 kW, 11 kV, 1488 rpm motor unit-04 inclusive of all required skilled labour and tools tackles.

Providing/Fitting of New Single row deep groove ball bearings 6230 C3 of SKF/FAG make to 695 kW, 11 kV, 1488 rpm motor unit-04 inclusive of all required skilled labour and tools tackles.

Providing/Fitting of New Single row deep groove ball bearings 6226 C3 of SKF/FAG make to 695 kW, 11 kV, 1488 rpm motor unit-04 inclusive of all required skilled labour and tools tackles.

Providing and fitting of 24mm, 175 mm long high tensile strength nuts and bolts in place of damaged ones