The SKF type keyless propeller, as its name implies, requires no key for fastening it on the cone part of the propeller shaft. Its unique feature therefore is that the propeller torque is taken only by friction between the propeller and propeller shaft. It has the following advantages surpassing the keyed propeller: simple construction, no key slot and consequently no concentration of stresses at the edge of key slot unlike the ordinary keyed propeller, and uniform distribution of stresses over the internal surface of the propeller boss. The keyless propeller therefore aroused a great interest among the maritime communities and that demand for it is on the steady increase. The push-up and the slippage tests on a test keyless propeller to evaluate the reliability of the keyless propeller for practical marine application were carried out. The test keyless propeller was of 6.8 m in diameter and made of Ni-Al bronze, identical to the working unit. The test results revealed that the SKF type keyless propeller was quite sound both in design and construction for practical marine use, and provided clues to possible improvements.

  • Corporate Authors:

    Mitsubishi Heavy Industries Limited

    5-1 Marunouchi, 2-chome, Chiyoda-Ku
    Tokyo 100,   Japan 
  • Authors:
    • Kishikawa, H
    • Matsumoto, J
    • Kawazoe, T
  • Publication Date: 1976-7

Media Info

  • Pagination: 14 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00145871
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: MTB-108 Tech Bull.
  • Files: TRIS
  • Created Date: Jan 16 1977 12:00AM