Thanks for all the feedback - some very good info!

Masking
As to all those who indicate masking off the metal what about oxidation?
I'm concerned about the appearance of masking off the painted areas.
Can the screw be coated after assembly?
Hard to take apart for sure..........

I have some problems with masking.
I have no issue with the electrical/mechanical principles....
But it seems that the appearance will be very poor and the effort to accomplish 
high.
I suppose that is why plated surfaces are preferred......

What about conductive paint?
Too expensive?
Appearance?

Chris Wells
Senior Design Engineer
Cutler-Hammer
christopherdwe...@eaton.com

----- Original Message ----- 
  From: C
From - Tue Mar 26 05:05:19 2002
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<altdp7bac3m8e...@jmwa.demon.co.uk>
Subject: Re: chassis bonding - star washers enough?
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"John Woodgate" <j...@jmwa.demon.co.uk>
>
> Brilliant! Next: teeth both internal and external (I've seen some, but
> they are very rare). And after that, quick-release bolts, so that the
> washer can be easily taken off for microscopic inspection and
> metallurgical tests.

<chuckle>
Personally John, I'm waiting for the hand-held metallurgical
photo-microscopy micro-fracture x-ray scanner to be required.
But I hear it's held up in the test lab due to some problems with
the star washers they're using or somethin ... - Doug McKean



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