Kern Roy American Machinist 09-01-2000 Ask Roy Byline: Kern Roy Volume: 144 Number: 9 ISSN: 10417958 Publication Date: 09-01-2000 Page: 105 Type: Periodical Language: English Fatigue failures We manufacture shafts used in heavy-duty gearboxes for oil-well equ ment and farm machinery.

Kern Roy

American Machinist

09-01-2000

Ask Roy

Byline: Kern Roy
Volume: 144
Number: 9
ISSN: 10417958
Publication Date: 09-01-2000
Page: 105
Type: Periodical
Language: English

Fatigue failures

We manufacture shafts used in heavy-duty gearboxes for oil-well equ ment and farm machinery. athwart the years, we have used standard grades of sabres such as 1045, 8630, 8645 and 8660 The shafts are usually made from 2 to 4-in.-diameter bars machined ofter heat treating to a hardness of 262 to 321 BHN

Our question is that we occasionally achieve fatigue failures after 500,000 load circle of times which, of ...

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