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differential magnet

sweetk30

sweetk30

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the round magnet with the hole in the center and glued/rtv down to the case on the bottom inside the axle.

lookin for a few of these magnets for some work i need to do soon and did some basic serching on mcmaster-carr and didnt get to far.

anyone got a link to a place i can buy some ?
 
You want a magnet, or a MAGNET?

I have a lot of the supermagnets, don't know if I have one shaped the way you need though.
Remember now, these are not the magnets you are used to. I got one about 2X2 inches maybe 1/4 inch thick that is stuck to my front bumper and no one can pull it off.
I can get it off by using both hands to slide it to the edge and pries it off.

This outfit sells some. This link is to the ring magnet page. If it does not have to be a ring, go back to the top and select what you want in the upper right pulldown.
http://www.magnet4less.com/index.php?cPath=13

There is actually one more I would like to buy. I just cannot justify the expense.

Its here.
http://unitednuclear.com/index.php?...=70_80&zenid=4a70ad76933d9fa13045f8d7ab911d65

I want a number 42, you could probably use a number 405.

I like the idea of walking into a room and all the CRTs going haywire. Not enthusiastic about flying equipment heading my way though.......

And there is this outfit. I've bought from them before.
They don't give as much info as the first site.
http://69.175.14.181/catalog/index.php?cPath=23_37&sort=1a&filter_id=13
 
I think any given repair shop should have at least 1/2 dozen stuck to the side of their parts washer.

Thats how it was when I was at the ford dealer anyway.
 
Fordum,

A cheap way to get some of those super magnets is to disassemble your old PC hard drives.

The actuator (VCM) has a nice strong magnet on either side of that coil.... The kind that won't come off the refrigerator without two hands and a pry bar! Almost everyone has at least one old dead hard drive laying around...so taking it apart is a fun, free way to get a REALLY powerful diff or engine oil magnet. :waytogo:

I use them a lot to hold sheet metal when I'm trying to butt-weld panels and keep them really flat and aligned to each other.


:usaflag:
 
I have seen magnets like those at Radio Shack.....cheep too!..(the round ones with the doghnut hole in the center)...personally I've seen some magnets come unglued and get chomped by the gears,possibly causing more damage than it ever would have prevented in diffs before...(maybe thats why there are so many clinging to the parts washers,they leave them out on purpose!)...I truast the magnets that are made into drain plugs more than ones just epoxied in place..

The strongest magnet I ever had was one a friend of my dad gave me--he worked at a military base and repaired aircraft..one day after he learned I was very interested in magnets and magnetism,he brought me a huge horse shoe looking one about 6" tall and about as thick,he said it came from the small tail rotor on an army helicopter that crashed..I had a blast with that thing-

-I looped a belt around it and walked in my moms sewing room and picked up at least 100 pins & needles she never knew were on the flor,and I took it to school for show & tell,when I walked by a desk,it slid over a good foot and the magnet stuck to it with such force,it took two adults it pull it off!!...later that day I walked into our living rooom with it,and when I got about 5 feet from the color TV my dad had bought just months before,the coloers turned all purple and green,and couldn't be adjusted with the color and tint controls--he had to call a tv shop and a guy came out to "de-gauss" the picture tube..

I never saw that magnet again!..wish I still had it...what became of it was a mystery,I think my dad "dosposed" of it so his TV wouldn't get screwed up again...:(

In trade school,I bulilt an electromagnet that would lift 300 lbs,but it only worked for about 10 minutes before the coil I wound fried!...

I have a few hard drives I might "gut" and get the magnets out of..I can never have enough magnets,I am always ripping the ones off speakers to use in my quonset garage to hold things to the steel walls and to keep small parts from vanishing when I take things apart...
 
A lot of the super magnets I have came out of hard drives. Some I took apart, but most of them I bought separate.
You can still find the hard drive magnets for sale, but they are getting scarce. Most of the ones you find are from much older hard drives than you would have laying around the house.
They are great magnets, but you can buy some now that are stronger and smaller.

I'm not sure what some of these are for. Maybe they were not made with a specific purpose.

For instance, I have several chrome plated 1/2 inch dia magnetic balls. They look like big ball bearings.
I love to drop one down a piece of 3/4 or 1 inch copper pipe and watch it just float down due to the current generated by its passing a shorted conductor.
I have considered firing one really fast down a tube with compressed air to see if I could melt the pipe, but I would lose my magnet.

That big horseshoe magnet, did it have two eyes on one end? Edmund scientific and other places used to sell those.
I still have one. I tie a string to it and drag it around when I drop a nut or bolt in the grass.
It does a good job, but if it doesn't find it, I grab one of the bigger super magnets.

There is no good way to attach a line, but as long as I have a pretty good idea where to start, I can just hold it in my hand and pass it over the area.
If its small, it will fly up to the magnet.
 
Fordum said:
A lot of the super magnets I have came out of hard drives. Some I took apart, but most of them I bought separate.
You can still find the hard drive magnets for sale, but they are getting scarce. Most of the ones you find are from much older hard drives than you would have laying around the house.
They are great magnets, but you can buy some now that are stronger and smaller.
Click to expand...

In my line of work there are always plenty of hard drives around. I could ship magnets out to people but just imagine the chaos when a box full of super-magnets tried to go through all that automated sorting equipment at the post office! :haha:

Tom Foolery would prevail... :thumb:


:usaflag:
 
That big magnet I linked to from United Nuclear states it can only be shipped ground due to problems with aircraft navigation equipment.
 
The big magnet I had was about 6" thick and 6" high,it weiighed about 10-15 lbs,and I bet it would have lifted a couple hundred pounds,but I was only 9 years old when I had it and I was lucky to be able to carry the magnet,after having a double hernia at age 4!...it had no "ears" to attach ropes to it,it was just like a horseshoe ,only a lot thicker!...I dont know what purpose it served in the helicoptors tail rotor,maybe it balanced it or something...

My friend had one of those Edmund Scientific magnets,he used to drag a pond across the street from his house with it--he'd get in his rubber raft and lower it on a rope,and he found many things people lost there wjile swimming,like car keys,once his dad who was a cop borrowed it and used it to find a gun someone had tossed in another pond after a robbery...My friend also boought a "Frensel Lens" from that place,it was a big square magnifying glass mounted on an adustible stand and base--the thing supposedly could reach 11,000 degrees in direct sunlight--we melted some steel with it once,and after we set the woods behind his house on fire with it,it dissapeared..I think his dad took it!...before we could see what else we could destroy with it..:D..it made quick work of ants!...we made glass out of sand with it too..and burned ourselves too of course!..
 
Greg72 said:
Fordum,

A cheap way to get some of those super magnets is to disassemble your old PC hard drives.

The actuator (VCM) has a nice strong magnet on either side of that coil.... The kind that won't come off the refrigerator without two hands and a pry bar! Almost everyone has at least one old dead hard drive laying around...so taking it apart is a fun, free way to get a REALLY powerful diff or engine oil magnet. :waytogo:

I use them a lot to hold sheet metal when I'm trying to butt-weld panels and keep them really flat and aligned to each other.


:usaflag:
Click to expand...


Buddy of mine brews his own beer, and being the handy CK5 DIY type, he builds these gizmos for everybody in the local brew club ... you get a plastic-coated metal pill that goes in your glass cookware, and put a magnet on one of those 3-4" cooling fans from PC's, stick it in an enclosure under the glassware. The magnet grabs the pill and makes it swirl around inside the glassware, keeps the yeast mixture or whatever stirred up.

Anyway, he takes my old hard drives and steal the magnets from them -- I haven't e-cycled HD's in years thanks to him. He also steals the fans from my dead power supplies, but I tear those down for him. I've found the hard drives have too many sharp bits inside and I cut my fingers, so I make him do that part :haha:

-- A
 
can only be shipped ground due to problems with aircraft navigation equipment.
Click to expand...

Holy crap !!!


Beware - you must think ahead when moving these magnets.
If carrying one into another room, carefully plan the route you will be taking. Sensitive instruments like CRT monitors will be affected in an entire room. Loose metallic objects and other magnets may become airborne and fly at great speed to attach themselves to these magnets. If you get caught in between the two Supermagnets you can be severely injured or killed. These magnets will crush bones in the blink of an eye.
Two of these magnets close together can create an almost unbelievable magnetic field that can be incredibly dangerous.

Two Supermagnets can very easily get out of control, crush fingers and instantly break ribs or even your arm if opposing poles fly at each other.
 
Yep, now see why I want one??:D
 
I could see myself walking through our offices with one in my pocket and all of the paperclips and stuff flying off of peoples desks as I walk past...:haha:
 
And the secratary with that steel nose ring gets her nostrils stretched out to the max as you walk by her too....:D
 
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