07-27-2010 06:56 PM
A big if here but if you have a microwave oven headed for the dump then you can destroy...uhdismantle it and get the magnet off of the magnetron. I think that's what it's called. I have 4 of them and all are about 3/8 thick by about 3 in diameter with about a 1 inch hole in the center. I scrounged them off the street and if you need a good magnet there is a source for free...except effort.
07-28-2010 07:22 AM
Another source for magnets are old hard drives. There are 2 rare earth magnets in there for the voice coil head positioner. Usually 1/8 to 3/16 thick curved and very strong. I use one to keep my drill press key attached to the machine, my buddy is left handed so he can swap sides if he is using my shop. I use 1 to hold a clip board on my cabinet and 1 to hold a note pad for the next HW store run. My wife has several she uses on the refrigerator to hold a calendar, shopping lists and coupons
07-28-2010 01:28 PM
For anyone that is a fisherman that has had a trolling motor go bad, and to costly to repair. Inside surrounding the lower motor casing glued to the inside is one of the most power full magnets that I have found. May take a chisel to get them loose....
08-11-2010 02:27 PM
If you can find an old stereo speaker where the cones is torn or trashed, harvest the driver magnet. The bigger the speaker, the stronger the magnet.
08-12-2010 06:32 PM
Panel meters from old electronic equipment contain magnets that encompasses a wire coil on the meter's needle movement. The size and power of the magnet will of course depend on the physical size of the meter. Bob
08-19-2010 09:42 AM