Effects of Tooth Profile on Scoring Behavior in Spur Gears

Masahiro Fujii, Fumio Obata, Akira Yoshida, Hiroshi Matsuda, Komei Fujita

Research output: Contribution to journalArticlepeer-review


To find out a fundamental tooth profile design policy for the scoring of spur gears, the effects of tooth profiles on scoring behavior were examined taking account of the two-cylinder test results. The tip interference on the approach side markedly affects the scoring phenomena. Both the reduction of the maximum specific sliding on the geometrical working flanks and the avoidance of tip interference on the approach side are the essential conditions to obtain spur gears having superior scoring load capacity. In the mixed lubrication state, where the scoring occurrence has an intimate relation with the working flank bulk temperature, the scoring bulk temperature of a spur gear pair with no tip interference on the approach side can be estimated well by the bulk temperature on the outer surface of the cylinder immediately before seizure in two-cylinder tests.

Original languageEnglish
Pages (from-to)1017-1025
Number of pages9
Journaltransactions of the japan society of mechanical engineers series c
Issue number512
Publication statusPublished - 1989
Externally publishedYes


  • Bulk Temperature
  • Gear
  • Lubrication
  • Scoring
  • Specific Sliding
  • Tip Interference
  • Tooth Profile

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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