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Trade press article — Plant Engineering

Sleeve bearing clearance depends on many factors

  • June 2016
  • Number of views: 15088
  • Article rating: 2.7

By Chuck Yung
EASA Senior Technical Support Specialist

It’s fair to say that one’s outlook on life is colored by experience. A good example of this with sleeve bearing motors is the question, “What’s the proper clearance between a shaft and the sleeve bearing it rides in?” Chances are each of us has a rule of thumb for this, probably related to shaft diameter. Some of these may look familiar:

  • One thousandth, plus 1 per in. of diameter
  • Two thousandths, plus 1 per in. of diameter
  • 0.0015 in. per in. of diameter
  • 0.002 in. per in. of diameter

They can’t all be right, yet many of us may have used one of these rules (probably not the same one, either!) with great success. Which one, if any, is correct? The answer depends on the application.

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 2: Mechanical repair

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 8: Bearings
  • Section 10: Mechanical

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 10: Bearings & Lubrication

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 10: Bearings & Lubrication

Root Cause Failure Analysis
  • Section 6: Mechanical Failures

Mechanical Repair Fundamentals of Electric Motors
  • Section 6: Bearing Housing, Shaft Openings, Seals & Fits

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Tags: Sleeve bearings Clearance Shafts
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