FAILURE ANALYSIS OF A HERRINGBONE GEAR IN 2-HI PINION GEARBOX USED IN HOT STEEL MILL

Authors

  • Somdech Ingkawara Lecturer, Department of Industrial Engineering, Faculty of Engineering, Pathumwan Institute of Technology, 833 Rama 1 Road, Wangmai, Pathumwan, Bangkok 10330
  • Samroeng Netpu Lecturer, Master of Engineering Program in Engineering Management, Graduate School, Kasem Budit University, 1761 Pattanakarn Road, Suan Luang, Bangkok 10250

Keywords:

Failure analysis, Key, Keyway crack, Herringbone gear failure, 2-Hi pinion gearbox

Abstract

This paper describes an investigation of a failure of a herringbone gear in a two high pinion gearbox used in a continuous hot re-rolling steel mill in Thailand. The gear failed prematurely after approximately 10 hours of operation. Standard investigative procedures were employed. It was found that the premature failure of the gear which appeared as a longitudinal crack was due to excessive stress. This excessive stress was the results of improper fit between the key and the keyway. The key was slightly too large for the keyway due to machining errors. It is concluded that poor manufacturing and improper mounting could lead to premature failure of the key components such as gears and could be very costly.

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Published

2019-05-17

Issue

Vol. 9 No. 1 (2019): January-April 2562

Section

บทความวิจัย (Research Article)

License

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            The article has been published in Kasem Bundit Engineering Journal (KBEJ) is the copyright of the Kasem Bundit University. Do not bring all of the messages or republished except permission from the university.

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