Join Date: Sep 2012
Location: St. Clair Shores, MI, USA
Re: Attaching mirrors with magnets
Few thoughts on magnets:
Don't try to drill a hole in the magnet itself. Almost all strong magnets are very brittle, both in the material, and if you think about the forces at work, they kinda want to rip themselves apart anyway.
Hard disk magnets are amazing. And will bite your fingers if given a chance.
Magnetic fields fall off DRASTICALLY with a very small gap. If a magnet is too strong, a thin sheet of plastic over it will put enough gap to reduce its strength measurably, a little thicker sheet may make it too weak.
If you haven't tried it, try the Devcon Plastic Weld epoxy. It's wickedly strong, sticks to almost anything, and just a little flexibility that keeps it from shattering. My best story with the stuff is a number of years ago, my convertible's rear window (glass) separated from the rear curtain (plasticized canvas). Not being quite ready to drop $$$ in a new top, and the rest of the top being "ok", I tried this glue...it held the window to the curtain for at least two more years before I replaced the top for OTHER reasons...in the sun, and put up and down frequently. Use out doors, stinks horribly while curing (but no problem after cured)