ATM Re: [bigdob] Removable bearings for a dob

["at making" <atmaking@hotmail.com>]

Thanks for your info Stathis, I will check the page carefully ! Big bearings 
are great but really takes a lot of room when they are on the scope. I wish 
they could be remove (for the upper part), with a dovetail but I don't know 
how to make one with the tools I got.



Frédéric Géa
http://www.astrosurf.com/altaz

>From: "Stathis Kafalis" <dobsonstathis@planet-interkom.de>
>Reply-To: bigdob@yahoogroups.com
>To: <bigdob@yahoogroups.com>,<atm@shore.net>
>Subject: Re: [bigdob] Removable bearings for a dob
>Date: Wed, 21 Aug 2002 11:26:47 +0200
>
>Yes, I have removable altitude bearings and I like them very much. See my
>webpages at the 17.5" and 24" scope and the 6" and 10" travelscopes as 
>well.
>I chose a diameter of approx. 1.2 x mirror diameter and so they fit into 
>the
>mirror box for transport. They are screwed with hand knobs, which is qute
>fast and stable. I use T-nuts, that are driven into the wood. Exact
>positioning is a bit tricky, but I am sure you will have no problem with 
>it.
>
>I considered as well, to make the upper part removable only, but did'n find
>the right solution. Has somebody an idea, how to fix it to the lower part?
>
>Stathis Kafalis
>http://www.geocities.com/dobsonstathis
>
>----- Original Message -----
>From: "at making" <ATMAKING@HOTMAIL.COM>
>To: <atm@shore.net>; <bigdob@yahoogroups.com>
>Sent: Wednesday, August 21, 2002 10:58 AM
>Subject: [bigdob] Removable bearings for a dob
>
>
> >
> > Hi,
> >
> > I'm currently designing a 24" dob and to save height during transport, 
>I'm
> > trying to find a good solution to have removable bearing. First I tought
>to
> > remove only the upper part but it can be tricky to make a soft bearing
> > surface joining part and that may give problem at the eyepiece. May be
> > "round angle" shape teflon pads are enough to absorb the "gap" between 
>two
> > parts in case the connection is not accurate enough. Second choice, 
>remove
> > the whole bearing, do you have any web site or ideas about that ? 
>Bearing
> > will be removable. I would like to have an easy setup. I think Stathis 
>has
> > worked on something similar if memory serves me.
> >
> > Thanks for your help !
> >
> > Frédéric Géa
> > http://www.astrosurf.com/altaz
> >
> >
> >
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