MAIN PROPULSION SHAFTING ECCENTRICITY CONSIDERATIONS

The criteria used to establish eccentricity tolerances for main propulsion shafting are assessed. It is concluded that many of the eccentricity tolerances specified for naval shafting are unneccessarily restrictive whereas those specified for merchant shafting are not sufficiently restrictive to ensure satisfactory performance. Cost effective criteria for establishing eccentricity tolerances for both merchant and naval shafting are presented. The alternative methods available for straightening propulsion shafting sections are evaluated. Results of controlled experiments with the "hot spot" method are presented, and both theoretical and experimental data developed with the "selective cold rolling method" are analyzed. It is concluded that the selective cold rolling method is preferred provided that the shafting can be placed in a lathe.

• Supplemental Notes:
  • Presented at the Hampton Roads Section of the Society of Naval Architects and Marine Engineers.
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Ancarrow, J E
  • Harrington, R L
• Publication Date: 1973-2

Subject/Index Terms

• TRT Terms: Alignment; Maintainability; Maintenance management; Reliability; Shafts (Machinery)
• Uncontrolled Terms: Maintenance costs
• Old TRIS Terms: Shaft alignment
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00044450
• Record Type: Publication
• Source Agency: Society of Naval Architects and Marine Engineers
• Files: TRIS
• Created Date: May 23 1973 12:00AM