Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: 40 Grit ??

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Robert May on February 3, 2000 19:05:57 UTC

Yep, it does go quickly! You do end up trading off time for a bit with that method although you need to spend the time going through the 80 grit doing it as fine grinding. I would prefer making up a diamond wheel grinder than going to 40 grit for a small mirror. Take a concrete or tile (even the 3" ones are usable for this) cutter wheel and make a cup so you can bend it a bit and get the nut into the cup of the wheel and set the assembly onto a drillmotor or a general purpose motor and by tilting at a certain angle and rotating the glass underneath, you can do a fast job of hogging out very deep curves very fast. If you look around on the web, you'll see some stuff on this technique.

Follow Ups:

    Login to Post
    Additional Information
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2023 John Huggins All Rights Reserved
    Forum posts are Copyright their authors as specified in the heading above the post.
    "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
    are trademarks of John Huggins