500 KW Classic and New Design Commutators

Statement of Work for Classic and New Design Commutators

Work consists of disassembly, data recording, and manufacturing 500 KW 2 each New and 2 each Classic Design commutators. The commutators, government furnished material (GFM), will have already been removed from their shafts. The GFM will be supplied to the contractor as an example of the commutators to be manufactured by this procedure. The front and back clamp rings may be reused on the new commutators provided they are suitable for reuse. The commutator core barrel shall be manufactured new. All copper and insulating materials shall be replaced. All studs, nuts, washers and locking plates shall be replaced. The commutators shall be completely stripped, re-insulated, copper bars replaced, spin seasoned, electrically tested, machined, and balanced in accordance with the Commutator Refurbishment Procedure. A separate copy of the Commutator Refurbishment Procedure, including all data and certification signatures, shall be completed and included with each commutator refurbished and sent to PNS.

1. 
   
2. The refurbishment of the 500 KW commutators called for in this procedure can be performed without reference to any original equipment manufacturer (OEM) armature drawings. The refurbishment of these commutators must meet the specifications in the Commutator Refurbishment Procedure herein.
   
3. The contractor is to complete and forward a detailed commutator data and dimension sheet on the first commutator refurbished during initial disassembly. The data sheet is to be forwarded to the Portsmouth Naval Shipyard (PNS) contracting official for review and approval prior to reassembly. Subsequent commutators are to be compared to the original data sheet during disassembly. Any discrepancies are to be noted and forwarded to PNS.
   
4. The commutators to be refurbished by this procedure are to be built to the dimensions of the original commutator data sheet that was completed by the contractor, and the dimensions provided in the Commutator Refurbishment Procedure enclosed.
   
5. In the event no carcass is available for refurbishment, all parts will be manufactured new in accordance with this procedure. These commutators will be completed within 45 calendar days of the request from PNS in writing.
   
6. Dimensional tolerances unless otherwise specified in the contract shall be the same as standards used for high quality commutator manufacture and/or the "Twenty Eighth Edition of Machinery's Handbook".
   
7. The contractor awarded the contract shall notify PNS prior to subcontracting any of the work such as, segment manufacture or commutator balance or spin seasoning to a different contractor. PNS reserves the right to verify the subcontractor has extensive experience in the field.  In the event that PNS deems the subcontractor unqualified, the subcontractor shall not be used.
   
8. The commutator contractor shall contact the local Defense Contract Management Agency (DCMA) representative and PNS Technical Point of Contact 10 days prior to shipment of the commutators so that an on site representative can review the refurbishment data before shipment. The local DCMA and/or a PNS representative shall also be allowed to do spot checks on the commutators during manufacturing to ensure that the requirements of the contract are being followed.
   
   
   *Please see all attached documents for further information*