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Preventing fatigue failure in stainless steel shaft?
A small shaft of grade 304 stainless is threaded through a collar and is failing a few threads into the collar. The application is the shaft has a solinoid pressing down on it about once a second. They are failing after about 100 service hours. How can I extend the life of these shafts?
The grade must be a non-magnetic stainless steel. I also tried reducing the number of threads, but the new fail point moved up the shaft back into the threaded area.
Any ideas how to extend the life? Thanks.
I agree it's a stress failure.
Can you reduce the shock of the servo impulse
in your application?
If the transmission of the impulse is not time critical,
even a small shock absorbing pad might 'do it for ya'.
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