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
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: UHMW Anyone?YES I Have

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Rick Crockett/">Rick Crockett on February 14, 2000 20:13:17 UTC

: Hope you had clear skies last night, : Im wondering if anyone has used a material called UHMW as opposed to Teflon as a dob bearing material. It is supposed to have the same characteristics as Teflon. It's also less "expensive" than Tef. Any comments?

Hi Jeff:

UHMW and teflon are very different. Teflon is a liquid and will flow under pressure. I prefer UHMW for bearings because it is more stable. UHMW is a crossed link polymer and therefore a solid. One might think of it as a super wax. It has a lower melting point than teflon allthough you could still boil water in it. While UV resistant it will breakdown over years of exposure to the sun. I like to use it inside tubing as sliding bearings. Unlike teflon the bearings will stay firm and wobble free. Teflon is toxic if heated. UHMW is safer, can be cast and is flammable like wax when melted at about 330F.

Have Fun, -Rick

Follow Ups:

    Login to Post
    Additional Information
    Google
     
    Web www.astronomy.net
    DayNightLine
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2020 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