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

V. Spitas, C. Spitas, T. Costopoulos

Research output: Journal PublicationArticlepeer-review

14 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 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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