May 2021
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Reliability: Pushing the limit can have unexpected consequences
A prominent manufacturer rediscovered the old axiom, “pushing the limit can have unexpected consequences,” after experiencing many bearing failures in its 40-hp air blowers. These lifetime-lubricated (sealed) bearings had been properly installed on 20-mm shafts, and it can be assumed that premium greases were being used.
The Author
Heinz P. Bloch resides in Montgomery, Texas. He retired as Exxon Chemical’s Regional Machinery Specialist for the U.S. and has authored or co-written more than 780 publications, among them 23 comprehensive books on practical machinery management, failure analysis, failure avoidance, compressors, steam turbines, pumps, oil mist lubrication and optimized lubrication for industry. Mr. Bloch holds BS and MS degrees (cum laude) in mechanical engineering from the Newark College of Engineering (NCE). He is one of 10 inaugural inductees into NCE’s Hall of Fame, which honors its most distinguished alumni.
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