From: "Jan van Gastel" 
To: "ATM" 
Reply-To: "Jan van Gastel" 


I use simple inexpensive rollerskate bearings for my two platforms. For
visual use they are certainly good enough. I have no experience with
photographic use.

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/


----- Original Message -----
From: "Douglas Braun" 
To: 
Sent: Saturday, December 14, 2002 6:18 AM Subject: RE: ATM Equatorial platform


>
> Where we're on the subject:  I am thinking of building a
> cylindrical-bearing platform using roller skate bearings.
>
> Does anyone know how good the bearings have to be?
> I have seen skate bearings in grades ABEC 3, 5, and 7.
>
> There are also miracle ceramic and titanium bearings
> for the serious skater fanatics, but I think that
> would be overkill :-)
>
> Doug Braun
>
>
>

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