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Thread Efficiency

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ProcEng2

ProcEng2

Nuclear
Joined
Dec 20, 2006
Messages
16
Location
US
I have the following stem thread:

.563-7 Stub ACME L.H. Thread

The "nut" material is B21-464-H02
Stem material is A-564-630-1075

How do I estimate the stem thread efficiency assuming the threads are not lubricated?

I need an efficiency below 35% to ensure backdriving does not occur...
 
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