[AR] Re: Tin whiskers

  • From: Henry Vanderbilt <hvanderbilt@xxxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Sat, 6 Aug 2016 06:12:46 -0700

On 8/6/2016 1:05 AM, Uwe Klein wrote:

Am 05.08.2016 um 20:28 schrieb David Weinshenker / Henry Spencer:

Correct.  Stainless fasteners, you can buy off the shelf.

We've ( actually a customer project I was involved in)  had a PITA of a
problem with electropolished stainless item's threaded holes ( welded
nuts as well as machined threading ) and the corresponding stainless
screws. If ever a screw was binding even slightly during assembly
waiting a day or two and trying to remove them would be "unsuccesfull".
( torque the head off before it would move in the threads.)

Solution was coating the screws in a special process. ( don't have the
name at hand but can inquire.)

Stainless steel parts in sliding contact tend to "gall" (surface-to-surface sticking leading to chatter quickly leading to extreme wear) if unlubricated, or (if sliding contact is ongoing) even if lubricated with traditional petroleum-based lubes.

The solution I've seen is teflon-based lubes.

Henry

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