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
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