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Trade press article — Pumps & Systems

New ANSI/ASA Shaft Alignment Standard Adopted

  • May 2022
  • Number of views: 8286
  • Article rating:

Gene Vogel
EASA Pump & Vibration Specialist

Shaft alignment is a critical step in the installation of rotating machinery, in a new installation or a repaired machine. Skipping or botching this step can decrease operating efficiency and shorten machine life. The procedure for aligning two rotating machines requires measuring their relative shaft positions and adjusting one or both machine cases, usually by shimming at the feet. Until recently, though, how closely the shafts need to be aligned was an open question. That changed with the publication of American National Standards Institute/Acoustical Society of America (ANSI/ASA) standard 2.75-17. Here is a summary of what it covers and how it will benefit users involved with shaft machinery alignment.

  • The need for a standard
  • Purpose and scope
  • Tolerances
  • Alignment principles
  • Alignment quality grades
  • Making machine moves

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