Axial Play & End Play in Rotating Assemblies

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SUMMARY

This discussion focuses on axial play and end play in rotating assemblies, particularly in centrifugal chillers and compressors. The end play requirements are determined by the bearing configuration, with maximum end play related to the minimum preload necessary for optimal bearing performance. Each design presents unique tolerances, making it essential to consult bearing suppliers for specific allowable limits. Understanding these parameters is crucial for maintaining proper tip and cover clearances in centrifugal designs.

PREREQUISITES
  • Understanding of centrifugal chiller and compressor design
  • Knowledge of bearing configurations and preload requirements
  • Familiarity with axial and end play concepts
  • Experience with mechanical assembly tolerances
NEXT STEPS
  • Research bearing preload specifications for centrifugal chillers
  • Examine the impact of end play on tip and cover clearances
  • Learn about different bearing configurations and their tolerances
  • Consult manufacturers for guidelines on axial play in rotating assemblies
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Mechanical engineers, maintenance technicians, and anyone involved in the design or maintenance of rotating assemblies, particularly in HVAC systems and industrial applications.

droptchevy
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I was looking for information on axial play on a rotating assembly.More specifically a centrifugal chiller although any information would be good

I need information on end play, and why it is needed, why this axial force is created,etc.

Any help or links is appreciated
 
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The end play requirements are usually dictated by the bearing configuration you have. The max endplay will be related to the minimum preload that your bearings need to stay "happy." It's tough to give any real general information because every situation is different. You need to examine what you can tolerate for every design. For example, I have different end play requirements when I have a centrifugal compressor design. The endplay has an effect on the tip and cover clearances which need to be kept at certain values.

If you really need a place to start, take a look at who supplied the bearings in a particular installation and ask them directly about the allowable end play/axial play.
 

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