View Single Post
  #1  
Old 27-03-2010, 02:00 PM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
Q: angular separation of alt. bearing Teflon pads?

Hi all,

I've being asking questions and for assistance all the way through the rebuild of Odessius, and it ain't stopping now.

The 'Good Book' states that the angular separation of the altitude bearing Teflon pads as being 70*. However, I've seen many, if not all contemporary DIY dobs as having this angle less than this. The scope I've modelled mine on has it as being 60*, and I've seen others as little as 40*.

As I'm now at the rocker box making stage, this angular difference can mean the rocker box is as much as 100mm shorter. The depth of the bearings will be 25mm.

What would the effects of a reduced angle be? Should the Teflon pads be smaller?

Help will be appreciated.

Mental.
Reply With Quote