Where to buy larger rare earth magnets?

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Forum topic by dbhost posted 05-17-2010 05:36 PM 7721 views 0 times favorited 14 replies Add to Favorites Watch
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5705 posts in 3199 days

05-17-2010 05:36 PM

Simply put, I am trying to put together a dust hood / shroud for my lathe, using HVAC duct pieces, and need to attach to the lathe bed magnetically… All of the rare earth magnets I have seen look to be about the size of watch batteries, and I am looking for something a big more substantial… Any clue where I can get decent size magnets?

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14 replies so far

View JJohnston's profile


1622 posts in 3258 days

#1 posted 05-17-2010 05:40 PM

United Nuclear sells them up to the size of a hockey puck and bigger.

-- "A man may conduct himself well in both adversity and good fortune, but if you want to test his character, give him power." - Abraham Lincoln

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5705 posts in 3199 days

#2 posted 05-17-2010 05:42 PM

They list pretty much what I am looking for. 1” x .25” disks…

I have a pile of old hard disks (like less than 1GB hard disks from the early ‘90s… I may just have to see if I can strip some magnets out of there…

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View AaronK's profile


1506 posts in 3431 days

#3 posted 05-17-2010 05:54 PM

check amazon too – I think it’s has lots of stuff for sale there… IIRC it’s cheaper to get them on amazon than direct.

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5705 posts in 3199 days

#4 posted 05-17-2010 06:03 PM

Thanks AaronK…. Never would have thought about Looking on Amazon. I have a purchase that needs to go through there anyway… Might as well lump it together…

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View Orion's profile


15 posts in 3057 days

#5 posted 05-17-2010 06:29 PM

Lee Valley has larger sizes up to about 1” apparently. Pull strength of 30#, not sure if that’s enough for your application.

-- Horton Brasses Inc, makers of fine reproduction brass and iron hardware

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5705 posts in 3199 days

#6 posted 05-17-2010 08:15 PM

I am using a floor register box, 12” long x 4” wide, with a 4” fitting. I have created a curved hood over the work piece extending 12” up out of simple sheet metal / rivets, and clear RTV silicone. I want to magnet it in place, so I can move it easily, but still have it close to where I am working…

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View hObOmOnk's profile


1381 posts in 4094 days

#7 posted 05-17-2010 08:39 PM

I buy them from Lee Valley.

-- 温故知新

View ChunkyC's profile


856 posts in 3221 days

#8 posted 05-18-2010 12:17 AM

All Electronics Corp Has all sorts of magnets. Not sure if they’ll have what you need but it’s good place to snoop around.

-- Chunk's Workshop pictures:

View Triman's profile


50 posts in 3549 days

#9 posted 05-18-2010 12:36 AM

I’ve gotten them from:

They have all sizes, all the way up to monsters that have warnings on purchasing!

-- Bruce, San Jose, Ca

View lilredweldingrod's profile


2496 posts in 3073 days

#10 posted 05-18-2010 02:19 AM

I go to the wrecking yard and get the old speakers. Warm them up with a propane torch and tap with a hammer and bingo. Maybe a neighbor has a blown out wolffer. Now that one will hold it by itself.

View wichle's profile


96 posts in 2913 days

#11 posted 05-18-2010 03:14 AM

I get mine, large and small from K&J Magnetics Great service, great online catalog.

-- Bill, Michigan "People don't come preassebled, but are glued together by life"

View Rick's profile


9437 posts in 2999 days

#12 posted 05-18-2010 07:33 AM

As Orion & Randy have mentioned Lee Valley is where I buy mine. They also have “Cups” that aid in mounting the Magnets and increase the Holding Power by 4x’s.

If you click on Randys Link they are all there, plus other Components, and some GOOD Technical Information about them.

As Mr. Livingston(g) (One of these days he’s gonna give me POOP for spelling his name that way ..LOL..) said, if you put 2 of the 1” ones together you better have some Tools Available to get them Apart, and keep any Skin you value out of the way when they’re going together!!

Actually these things are a LOT of FUN! You could probably clean off someones Hard Drive in an Instant! RICHARD! For Shame!!!


-- LIFE is what happens when you're planning on doing Other Things!

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Jim Bertelson

4170 posts in 3131 days

#13 posted 05-18-2010 05:51 PM


I like the speaker idea. From now on, when I recycle a speaker, I am going to pop the magnets.

-- Jim, Anchorage Alaska

View MattinCincy's profile


128 posts in 3120 days

#14 posted 05-18-2010 09:37 PM

Try We use a lot of rare earth magnets at work and this is where we always get them. They have many shapes available – disks, rectangles, cubes, spheres, cylinders, tubes, etc. Good prices too!

If you want some dangerously powerful ones, go to United nuclear like JJohnstone suggested – just be sure to carefully read the warnings about these magnets – they can seriously injure you if not handled properly.

-- Wag more, bark less.

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