A new tightening method for bolted joints by the simultaneous application of torque and compressive force

Kazuya Mori, Shinji Hashimura, Yukitaka Murakami, Kunihiko Mineki

Research output: Contribution to journalConference article

3 Citations (Scopus)


The scatter of bolt clamping force tightened by the conventional torque control method very often causes loosening and fatigue failure of bolted joints. Different values of frictional coefficients between mating screw surfaces and between mating bearing surfaces cause the scatter of clamping force in each tightening. In this study, a new tightening method to reduce the scatter of clamping force of bolted joints has been developed. In the new method, the frictional coefficients at screw and at bearing surface of bolt head can be separately detected during a tightening process by simultaneously application of tightening torque and compressive force to a bolt. The tightening experiments have been successfully conducted to demonstrate the efficiency and usefulness of the proposed method. Furthermore the optimum configuration of bolt head to improve the accuracy of the proposed method has been investigated.

Original languageEnglish
JournalSAE Technical Papers
Publication statusPublished - 2001 Jan 1
Externally publishedYes
EventSAE 2001 World Congress - Detroit, MI, United States
Duration: 2001 Mar 52001 Mar 8


ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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