Re: [APML] M42 at 300mm on new EQ6 mount

[George Anderson <georgea@cam.org>]

Roland
Many thanks for that piece of experience Roland, like many others I was
under the impression that tapered was the way to go. I hand't realized
that the runout was that much higher than with ball bearings. The
tapered makes sense on the bottom as it will be taking the thrust from
the load, and as long as the load is substantially closer to the ball
bearing at the front near the worm gear, the error should be reduced.
On a different topic, what is the best method for cleaning dust off of
the Baader solar film? Please don't ask how it got dusty.

George Anderson
Montreal Canada

Clear skies and good health

Chris1011@aol.com wrote:
> 
> In a message dated 12/29/01 9:46:45 PM Central Standard Time, georgea@cam.org
> writes:
> 
> << even with
>  tapered roller bearings at the top and bottom on a 2" titanium shaft the
>  error will be horrific  >>
> 
> Interesing that people think tapered rollers are the best. Unfortunately, I
> found out the hard way that tapered rollers have 2 to 3 times the runout of
> ball bearings. They can be used in the rear shaft but not in front where the
> worm gear resides.
> 
> Roland Christen
> 
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