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Re: pic: 222 3 speed closeup/cutaway
Speaking of Kevin....
I just had a test today in that class, and it reminded me that the issue is worst if the metals are of the same or similar composition, same hardness, and relatively low hardness. The threshold for same hardness is within 5 HRC of each other. Soooo.. if you have a hardened steel shaft there, and the inside of your gear isn't hardened you should be reasonably ok.
Also, I'd still be concerned even though this isn't production equipment. Our prof showed us a few examples of some coupling threads that suffered from galling, and that's obviously not a high-cycle kind of thing. so mostly, I'd just keep it lubed and keep these things in mind in your white paper.
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The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.
Lone Star Regional Troubleshooter
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Reffing a FIRST event is unlike being an ump or a ref at any other event. Where else is a game invented each year and over 1000 teams play this game within 3 months of its birth? - Andy Baker [more] 
11-03-2004, 11:47
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