Re: [ATM] Use of bearings in (static) mirror cells

["David Harbour" <scarab2@cox.net>]

Olivier,

John Sherman is right. There is a variety of different kinds of MICROSCOPIC
MOVEMENT of the mirror in the cell; a bearing offers no resistance to these
microscopic movements, allowing the mirror to settle, with no strain, into
the position it "wants to". I love bearings, and have thought of uses for
them that have amazed licensed mechanical engineers. For a look at some
beautiful bearings (nice pictures, close ups, of same), visit my old give
away bearing catalogue at:

http://www.atmsite.org/contrib/Harbour/Brngz.html

I gave away all of my bearings through this catalogue; but there are some
beautiful bearings, and some fine enlargeable pictures of them. You might
enjoy taking a quick look at the pictures (each is linked to a full page
enlargement)-

This was my life's collection of bearings, now scattered to members of this
list.

David Antoninvs Harbovr
scarab2@cox.net



----- Original Message ----- 
From: "Olivier Biot" <olivier.biot@versateladsl.be>
To: <atm@atmlist.net>
Sent: Monday, April 18, 2005 4:38 PM
Subject: [ATM] Use of bearings in (static) mirror cells


> Hi list,
>
> Several ATMers (e.g., Bruce Sayre) use bearings for the "ball joints" and
> levers in their mirror cells. However, these bearings are used in a static
> environment (no real rotation of the bearings). Isn't there a friction
> problem with the use of bearings in a mirror cell? Would a joint made from
> silicone outperform the bearing?
>
> Please share your thoughts and experiences on this!
>
> Best regards,
>
> Olivier
>
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>


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