Magnets: What's a good source and how measure need?

ah, the truth comes out... I'll watch for them and not do anything irreversible with the lamp. thanks for the tip!

Tim
 
Some folks salvage them from microwave ovens but I wouldn't recommend it- dangerous Beryllium and sharp edges inside
Better to just buy them
m
ps If you have a hankering to salvage, try old loudspeakers
 
There are also these types of switchable magnets. I cannot vouch for their performance, but depending on what was in mind for a base they may be easier to attach. Just a thought.

-frank

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Don't know if this helps. On a small LED light from a dollar store I used 4 - 12 mm x 3 mm rare earth magnets from Truevalue. 6 for about $6. There was no magnet number on them. I epoxied them to base of lamp. The lamp weighs maybe a pound. It holds OK on a PM-30MV mill. I decided to go with all 6 magnets. I ordered 50 N52 strength from Ebay for $18. If it don't run away it is going to have a lamp attached for my old eyes. Amazon was too expensive when I checked. You could always go up in diameter too. Charles
 
eugene13 said:
Nice to know about the Beryllium, thanks.
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From what I was taught, So long as you dont break up the Beryllium component (pinkish ceramic looking part in the magnetron) or try to eat or inhale it in some fashion you should have NO problem. The danger comes in 2 ways; the 1st is to power up this part without the proper shielding because it will expose you to dangerous magnetic field and 2nd breathing in the dust particles from a broken or crushed magnetron will expose you to beryllium poisoning.

With that said if you take your time to properly disassemble the microwave neither of the dangerous exposure possibilities would be likely. There will be 2 magnets doughnut shaped to harvested that are approx 3"OD with about a 3/4"-1" ID hole by About 1/2"-3/4" thick and are actually pretty strong and should work very well for the OPs intended purpose.....Plus, if you live in or near a big city area you should not have a problem finding an old microwave sitting on the curb on garbage day if you keep your eyes open. Hope this helps. 20181219_201353.jpg
 
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Even if you do successfully remove the magnets, just tossing the leftover pieces in the garbage would be a no-no. And while whole microwaves are commonly recycled properly (supposedly), pieces and parts may not be. So there's that.
Just sayin'
M
 
Nope no fear. I have a bunch of hdd magnets and speaker magnets. If those don't work I'll buy one from one of the sources above.
Thanks for all the help!
Tim
 
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