Reduction of tooth fillet stresses using novel one-sided involute asymmetric gear design

V. Spitas, C. Spitas, T. Costopoulos

Research output: Contribution to journalArticle

12 Citations (Scopus)


For increasing the load carrying capacity of geared power transmissions several tooth designs alternative to the standard involute have been proposed. The use of non-involute teeth has a number of disadvantages and for this reason asymmetric involute-type teeth have been studied as a promising alternative. In this article the idea of one-sided involute asymmetric spur gear teeth is introduced to increase load carrying capacity and combine the good meshing properties of the driving involute and the increased strength of non-involute curves. These novel teeth are intended for constant direction of rotation, although they can be used in a limited way for reverse rotation. Both profiles are fully generated by a hob, the design of which is also investigated. The increase in load carrying capacity can reach up to 28{%} compared to the standard 207° involute teeth.

Original languageEnglish
Pages (from-to)157-182
Number of pages26
JournalMechanics Based Design of Structures and Machines
Issue number2
Publication statusPublished - Apr 1 2009
Externally publishedYes


  • Asymmetric teeth
  • Circular fillet
  • FEA
  • Root stress
  • Spur gears

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mathematics(all)
  • Automotive Engineering
  • Aerospace Engineering
  • Condensed Matter Physics
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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