Re: Mead screws

From: Chris L Peterson (clp_at_alumni.caltech.edu)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 13:39:55 GMT

On Fri, 30 Jul 2004 09:59:16 GMT, "Roger Hamlett"
<rogerspamignored@ttelmah.demon.co.uk> wrote:

>All the Meade threads are imperial.
>On the tube, they use 4-32UNC, 8-32UNC, and 10-32UNC. The '4' thread is
>the small one on the back of the actual arms, and the screws round the
>scope rings on different models, and places, are 8-32, 10-32, and 12-32. I
>think yours will be the 10-32.

Roger-

I think you've created some screw types that don't exist.

#4 screws are either 4-40UNC or 4-48UNF (that is, coarse and fine)
#8 screws are either 8-32UNC or 8-36UNF
#10 screws are either 10-24UNC or 10-32UNF

Left off your list are 6-32UNC and 6-40UNF.

By far the most common small screws used are 4-40UNC, 6-32UNC, and 8-32UNC. I
doubt this little 2045 OTA is using anything as big as 10-32UNC for a finder
bracket- there is nothing that large anywhere on my 12" LX200 tube.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

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