p.p.s. Please excuse all these emails, but I'm telling you my ideas as soon as they come into my head.
The smallest mounting magnet they make is just 5/8" diameter. This little guy packs a powerful force. It has a Pull Force of: 15.63 lbs See: http://www.kjmagnetics.com/proddetail.asp?prod=MMS-D-A The largest mounting magnet they have is 3" with an incredible Pull Force of: 352.4 lbs !!!! http://www.kjmagnetics.com/proddetail.asp?prod=MMS-D-Z0 John -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Carmichael Sent: Wednesday, January 05, 2011 9:48 AM To: 'Mike Shaw' Cc: 'Sundial List' Subject: RE: Glass on Glass Mosaic Indoor Sundial Windows p.s. Since these neodymium magnets are so strong, if they are too big, they may break the glass before falling off! I'm guessing that the magnetic bonding force is directly proportional to the area of the flat face of a disk magnet. The bigger the magnet, the more its bonding force. You might want to use a smaller size neodymium magnet with a gnomon for glass -----Original Message----- From: Mike Shaw [mailto:[email protected]] Sent: Tuesday, January 04, 2011 4:29 PM To: John Carmichael Cc: Sundial List Subject: Re: Glass on Glass Mosaic Indoor Sundial Windows John Nobody has mentioned double glazing yet. I assume that you don't bother with that in Arizona. Will the magnets still be OK to use through two thicknesses of glass with an air space between? Mike Shaw 53.37N 3.02W www.wiz.to/sundials --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
