A STATISTICAL AND ECONOMIC EVALUATION OF STERN TUBE BEARING AND SEAL FAILURES

The report presents the findings of known studies of the incidence and nature of stern tube bearing and seal failure in large merchant vessels. The repair costs and lost vessel service time associated with these failures are documented for ships of various sizes and types. It is calculated that the present value of the repair costs and lost service time is close to $100 million for ships having shafts larger than 500 mm in diameter which will be built between 1978 and 1990 unless research and development efforts are undertaken to improve stern tube bearings and seals. This cost does not include the cost of failures in ships already built that will be operating in the 1978-1990 time period.

  • Corporate Authors:

    Mechanical Technology, Incorporated

    968 Albany-Shaker Road
    Latham, NY  USA  12110

    Maritime Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Arpi, D W
    • Winn, L W
  • Publication Date: 1977-7

Media Info

  • Pagination: 88 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00168856
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: MA-RD-940-77091, MTI-77TR58
  • Contract Numbers: MA-6-38054
  • Files: TRIS, USDOT
  • Created Date: Dec 27 1978 12:00AM