Almost all of the rare earth magnets I have had eventually lose there
chrome or nickel. I have purchased from different vendors.
Is this because the ones I notice it are used to hold tools, and things
like the the drill chuck key.
Is it because they are banging the magnet?
Is it because the magnets are so strong the chrome just can't handle the
polarization?
Is it the quality of the magnets?
On Mon, 26 Mar 2012 07:29:32 -0500, Leon <lcb11211@swbelldotnet>
>Yeah and most likely most of the UPS cab is aluminum. But think of all
>the crap in the other packages that would be stuck to the magnet.
I'm wondering if they'd use some type of "canceling" magnet just for
shipping purposes ~ Something similar to the Lee Valley canceling
magnets.
http://www.leevalley.com/en/wood/page.aspx?cat=1,43838,47843&p=56000
CW wrote:
> If you got it stuck to something, I have no idea how you would get
> off.
Slide it off...
--
-Mike-
[email protected]
Leon wrote:
> On 3/25/2012 9:33 PM, Mike Marlow wrote:
>> Leon wrote:
>>
>>>
>>> I recon if the magnet is attached to a fixed object it would
>>> effectively weigh 1000 lbs. Probably would not be a hazard. BUT
>>> Imagine the UPS guy trying to get it out of his truck!
>>
>> Nope. It would all depend on what the affixed object weighed. If
>> the affixed object weighed 10 pounds, then the realized or perceived
>> weight would be 10 lbs plus the weight of the magnet.
>>
>
> Nope, not what I said, I said nothing about affixed. I said if the
> magnet is attached to a "fixed" object. Read that as an object that
> is attached to something that will not allow it to move. The fixed
> object could be 2 lbs but if bolted/fixed to a 10 ton block of
> cement.... ;~)
So you did. Sheese... picky, picky, picky...
--
-Mike-
[email protected]
"CW" <[email protected]> wrote in message
news:[email protected]...
>
>
> "Robatoy" wrote in message
> news:fabd09e1-bc72-4859-bce2-e5c8416e4d1c@b14g2000vbz.googlegroups.com...
>
> On Mar 24, 9:20 pm, Leon <lcb11211@swbelldotnet> wrote:
>> On 3/24/2012 2:16 PM, tiredofspam wrote:
>>
>> > Almost all of the rare earth magnets I have had eventually lose there
>> > chrome or nickel. I have purchased from different vendors.
>>
>> > Is this because the ones I notice it are used to hold tools, and things
>> > like the the drill chuck key.
>>
>> > Is it because they are banging the magnet?
>>
>> > Is it because the magnets are so strong the chrome just can't handle
>> > the
>> > polarization?
>>
>> > Is it the quality of the magnets?
>>
>> There are better built rare earth magnets that will not chip and IIRC
>> they do not have a thin chrome coating.
>>
>> Apparently an indestructible plastic coating protects these magnets.
>>
>> http://www.kjmagnetics.com/products.asp?cat=164
>>
>> And their other stuff.
>>
>> http://www.kjmagnetics.com/categories.asp
>
> Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
> muchly for that link there, Leon!
> ===============================================================
> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
> pull. I don't think I'd feel safe with that one.
That baby could probably erase your credit cards from across the
room!!!!!!!!!!!
"Leon" <lcb11211@swbelldotnet> wrote
>
> Nope, not what I said, I said nothing about affixed. I said if the
> magnet is attached to a "fixed" object. Read that as an object that is
> attached to something that will not allow it to move. The fixed object
> could be 2 lbs but if bolted/fixed to a 10 ton block of cement.... ;~)
I believe that the "pound" rating of pull is the amount of force that it
takes to remove the magnet from another magnet of the same strength. Like
all those "horsepower" ratings ate Sears. The actual amount of weight it
can lift/attract is much smaller. Anyway, I read that from a manufacturer.
It was buried in the small print, of course.
But don't mind me guys. Keep this mad scientist fantasy thing going here.
;)
Leon wrote:
>
> I recon if the magnet is attached to a fixed object it would
> effectively weigh 1000 lbs. Probably would not be a hazard. BUT
> Imagine the UPS guy trying to get it out of his truck!
Nope. It would all depend on what the affixed object weighed. If the
affixed object weighed 10 pounds, then the realized or perceived weight
would be 10 lbs plus the weight of the magnet.
--
-Mike-
[email protected]
"Leon" wrote in message
news:[email protected]...
On 3/26/2012 6:38 AM, Swingman wrote:
> On 3/25/2012 9:24 PM, Leon wrote:
>> On 3/25/2012 6:12 PM, CW wrote:
>
>
>>> ===============================================================
>>> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
>>> pull. I don't think I'd feel safe with that one.
>>
>> I recon if the magnet is attached to a fixed object it would effectively
>> weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS guy
>> trying to get it out of his truck!
>
> Good thing auto bumper are plastic these days ...
>
Yeah and most likely most of the UPS cab is aluminum. But think of all
the crap in the other packages that would be stuck to the magnet.
====================================================================
I imagine it would come in a really big box.
"tiredofspam" <nospam.nospam.com> wrote in message
news:[email protected]...
> Almost all of the rare earth magnets I have had eventually lose there
> chrome or nickel. I have purchased from different vendors.
>
>
> Is this because the ones I notice it are used to hold tools, and things
> like the the drill chuck key.
>
> Is it because they are banging the magnet?
>
> Is it because the magnets are so strong the chrome just can't handle the
> polarization?
>
> Is it the quality of the magnets?
Is it the fact that the magnets lose their chrome or nickel plating that
bugs you? Or that the magnets are no longer effectively useful?
I use magnets all over the place. Good sources are from stripped magnetrons
from microwaves (quite powerful, ferrous)[1] and stripped out hard drives
(good quality, powerful, rare earth magnets)[2].
I'm generally not too much bothered by the aesthetics.
[1] Your own, neighbours, skips etc. These also yield a bunch of screws and
other bits.
[2] OK, you're the bloke who has never had a HDD fail.
No offence meant or intended,
Nick.
On 3/26/2012 6:38 AM, Swingman wrote:
> On 3/25/2012 9:24 PM, Leon wrote:
>> On 3/25/2012 6:12 PM, CW wrote:
>
>
>>> ===============================================================
>>> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
>>> pull. I don't think I'd feel safe with that one.
>>
>> I recon if the magnet is attached to a fixed object it would effectively
>> weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS guy
>> trying to get it out of his truck!
>
> Good thing auto bumper are plastic these days ...
>
Yeah and most likely most of the UPS cab is aluminum. But think of all
the crap in the other packages that would be stuck to the magnet.
On 3/25/2012 9:33 PM, Mike Marlow wrote:
> Leon wrote:
>
>>
>> I recon if the magnet is attached to a fixed object it would
>> effectively weigh 1000 lbs. Probably would not be a hazard. BUT
>> Imagine the UPS guy trying to get it out of his truck!
>
> Nope. It would all depend on what the affixed object weighed. If the
> affixed object weighed 10 pounds, then the realized or perceived weight
> would be 10 lbs plus the weight of the magnet.
>
Nope, not what I said, I said nothing about affixed. I said if the
magnet is attached to a "fixed" object. Read that as an object that is
attached to something that will not allow it to move. The fixed object
could be 2 lbs but if bolted/fixed to a 10 ton block of cement.... ;~)
On 3/24/2012 2:16 PM, tiredofspam wrote:
> Almost all of the rare earth magnets I have had eventually lose there
> chrome or nickel. I have purchased from different vendors.
>
>
> Is this because the ones I notice it are used to hold tools, and things
> like the the drill chuck key.
>
> Is it because they are banging the magnet?
>
> Is it because the magnets are so strong the chrome just can't handle the
> polarization?
>
> Is it the quality of the magnets?
>
There are better built rare earth magnets that will not chip and IIRC
they do not have a thin chrome coating.
Apparently an indestructible plastic coating protects these magnets.
http://www.kjmagnetics.com/products.asp?cat=164
And their other stuff.
http://www.kjmagnetics.com/categories.asp
"Dave" wrote in message news:[email protected]...
On Mon, 26 Mar 2012 08:28:50 -0500, Swingman <[email protected]> wrote:
>> Even more ridiculous (or likely). A car passing a UPS truck and they
>> get stuck together. :)
>It happens to dogs ...
Now my cat hates you and it's your fault. My cat sits beside me on my
desk as I use the computer. Your dog comment made me laugh so hard
that she shot out of the room like a rocket.
===================================================================
Earlier this morning, I opened a bag of rolls. Was going to have one for
breakfast. Non resealable bag so I left it on the counter. Was going to put
them in another bag after I ate. I came back and there was one of my cats,
sitting on the floor munching on a roll. She didn't want the roll, she just
wanted to steal it. We have five cats. They're like little kids. Amazing how
much trouble they can get in to.
On Mon, 26 Mar 2012 08:28:50 -0500, Swingman <[email protected]> wrote:
>> Even more ridiculous (or likely). A car passing a UPS truck and they
>> get stuck together. :)
>It happens to dogs ...
Now my cat hates you and it's your fault. My cat sits beside me on my
desk as I use the computer. Your dog comment made me laugh so hard
that she shot out of the room like a rocket.
On 3/26/2012 8:38 AM, Dave wrote:
> On Mon, 26 Mar 2012 08:28:50 -0500, Swingman<[email protected]> wrote:
>
>>> Even more ridiculous (or likely). A car passing a UPS truck and they
>>> get stuck together. :)
>
>> It happens to dogs ...
>
> Now my cat hates you and it's your fault. My cat sits beside me on my
> desk as I use the computer. Your dog comment made me laugh so hard
> that she shot out of the room like a rocket.
LOL Glad I could be of some assistance to someone else this morning. :)
Since I started typing usenet messages this morning, and in between
same, I've unloaded precisely 337.5 sf of travertine out of the back of
my pickup at a remodel I've got going on about three blocks away from
the house, came back, cooked breakfast and got the two girls away on a
hopefully safe journey to AR ... now, back to check on the tile crew
that was NOT there in time to help me unload my truck.
It's gonna be a multi-tasking week.
Here's where my canine companion stays when I'm at the computer:
https://picasaweb.google.com/111355467778981859077/EWoodShopJustStuff#5723588834723567906
She is, despite appearances, indeed alive.
--
www.eWoodShop.com
Last update: 4/15/2010
KarlCaillouet@ (the obvious)
http://gplus.to/eWoodShop
On 3/25/2012 9:24 PM, Leon wrote:
> On 3/25/2012 6:12 PM, CW wrote:
>> ===============================================================
>> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
>> pull. I don't think I'd feel safe with that one.
>
> I recon if the magnet is attached to a fixed object it would effectively
> weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS guy
> trying to get it out of his truck!
Good thing auto bumper are plastic these days ...
--
www.eWoodShop.com
Last update: 4/15/2010
KarlCaillouet@ (the obvious)
http://gplus.to/eWoodShop
On 3/26/2012 7:20 PM, Mike Marlow wrote:
> Leon wrote:
>> On 3/25/2012 9:33 PM, Mike Marlow wrote:
>>> Leon wrote:
>>>
>>>>
>>>> I recon if the magnet is attached to a fixed object it would
>>>> effectively weigh 1000 lbs. Probably would not be a hazard. BUT
>>>> Imagine the UPS guy trying to get it out of his truck!
>>>
>>> Nope. It would all depend on what the affixed object weighed. If
>>> the affixed object weighed 10 pounds, then the realized or perceived
>>> weight would be 10 lbs plus the weight of the magnet.
>>>
>>
>> Nope, not what I said, I said nothing about affixed. I said if the
>> magnet is attached to a "fixed" object. Read that as an object that
>> is attached to something that will not allow it to move. The fixed
>> object could be 2 lbs but if bolted/fixed to a 10 ton block of
>> cement.... ;~)
>
> So you did. Sheese... picky, picky, picky...
>
Well Like Yahhhhhh. OMG!
"EXT" wrote in message
news:[email protected]...
"CW" <[email protected]> wrote in message
news:[email protected]...
>
>
> "Robatoy" wrote in message
> news:fabd09e1-bc72-4859-bce2-e5c8416e4d1c@b14g2000vbz.googlegroups.com...
>
> On Mar 24, 9:20 pm, Leon <lcb11211@swbelldotnet> wrote:
>> On 3/24/2012 2:16 PM, tiredofspam wrote:
>>
>> > Almost all of the rare earth magnets I have had eventually lose there
>> > chrome or nickel. I have purchased from different vendors.
>>
>> > Is this because the ones I notice it are used to hold tools, and things
>> > like the the drill chuck key.
>>
>> > Is it because they are banging the magnet?
>>
>> > Is it because the magnets are so strong the chrome just can't handle
>> > the
>> > polarization?
>>
>> > Is it the quality of the magnets?
>>
>> There are better built rare earth magnets that will not chip and IIRC
>> they do not have a thin chrome coating.
>>
>> Apparently an indestructible plastic coating protects these magnets.
>>
>> http://www.kjmagnetics.com/products.asp?cat=164
>>
>> And their other stuff.
>>
>> http://www.kjmagnetics.com/categories.asp
>
> Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
> muchly for that link there, Leon!
> ===============================================================
> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
> pull. I don't think I'd feel safe with that one.
That baby could probably erase your credit cards from across the
room!!!!!!!!!!!
==============================================================
If you got it stuck to something, I have no idea how you would get off.
Thanks, Have you used the rubber units?
I hadn't seen them before. For some items that makes sense.
For others not sure. I think I like the chrome look.
But for shop stuff the rubber will solve the problem. Nice the fact that
they become less prone to slide.
On 3/24/2012 9:20 PM, Leon wrote:
> On 3/24/2012 2:16 PM, tiredofspam wrote:
>> Almost all of the rare earth magnets I have had eventually lose there
>> chrome or nickel. I have purchased from different vendors.
>>
>>
>> Is this because the ones I notice it are used to hold tools, and things
>> like the the drill chuck key.
>>
>> Is it because they are banging the magnet?
>>
>> Is it because the magnets are so strong the chrome just can't handle the
>> polarization?
>>
>> Is it the quality of the magnets?
>>
>
> There are better built rare earth magnets that will not chip and IIRC
> they do not have a thin chrome coating.
>
> Apparently an indestructible plastic coating protects these magnets.
>
> http://www.kjmagnetics.com/products.asp?cat=164
>
> And their other stuff.
>
>
> http://www.kjmagnetics.com/categories.asp
On 3/26/2012 7:47 AM, Dave wrote:
> On Mon, 26 Mar 2012 06:38:10 -0500, Swingman<[email protected]> wrote:
>>> I recon if the magnet is attached to a fixed object it would effectively
>>> weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS guy
>>> trying to get it out of his truck!
>
>> Good thing auto bumper are plastic these days ...
>
> You're right. I can envision even a minor fender bender causing a car
> and the UPS truck to get stuck together because he was delivering high
> powered magnets.
Hey ... with the obvious advancing state of magnetism, it could happen! ;)
--
www.eWoodShop.com
Last update: 4/15/2010
KarlCaillouet@ (the obvious)
http://gplus.to/eWoodShop
"Zz Yzx" <[email protected]> wrote in message
news:[email protected]...
>>> Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
>>> muchly for that link there, Leon!
>
> Note that the "Smaller" ones (i.e. 3/4" X 1/8") from Woodcraft or Lee
> Valley are only sold in stacks of 5 or 10, because it takes too much
> labor to break them down into small er stacks.
>
> -Zz
Zz,
How do they get the plating in between the magnets in a stack of 5 or 10?
Thanks,
Kerry
On Mon, 26 Mar 2012 07:52:00 -0500, Swingman <[email protected]> wrote:
>Hey ... with the obvious advancing state of magnetism, it could happen! ;)
Even more ridiculous (or likely). A car passing a UPS truck and they
get stuck together. :)
"Zz Yzx" wrote in message
news:[email protected]...
On Sat, 24 Mar 2012 15:16:04 -0400, tiredofspam <nospam.nospam.com>
wrote:
>Almost all of the rare earth magnets I have had eventually lose there
>chrome or nickel. I have purchased from different vendors.
>
>
>Is this because the ones I notice it are used to hold tools, and things
>like the the drill chuck key.
>
>Is it because they are banging the magnet?
>
>Is it because the magnets are so strong the chrome just can't handle the
>polarization?
>
>Is it the quality of the magnets?
I've had the same luck. Some seemed to have chipped with only rare
use or contact.
====================================================================
It would seem that the chrome doesn't stick to well to the magnets. I have
seen the same thing. It appears that they plate the magnets directly.
Usually, a part is copper plated first before chroming. Copper seems to
stick well to most things but chrome does not. Chrome does stick to copper
very well though. It's likely just a cost cutting measure.
On Mar 24, 9:20=A0pm, Leon <lcb11211@swbelldotnet> wrote:
> On 3/24/2012 2:16 PM, tiredofspam wrote:
>
> > Almost all of the rare earth magnets I have had eventually lose there
> > chrome or nickel. I have purchased from different vendors.
>
> > Is this because the ones I notice it are used to hold tools, and things
> > like the the drill chuck key.
>
> > Is it because they are banging the magnet?
>
> > Is it because the magnets are so strong the chrome just can't handle th=
e
> > polarization?
>
> > Is it the quality of the magnets?
>
> There are better built rare earth magnets that will not chip and IIRC
> they do not have a thin chrome coating.
>
> Apparently an indestructible plastic coating protects these magnets.
>
> http://www.kjmagnetics.com/products.asp?cat=3D164
>
> And their other stuff.
>
> http://www.kjmagnetics.com/categories.asp
Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
muchly for that link there, Leon!
On 3/26/2012 8:07 AM, Dave wrote:
> On Mon, 26 Mar 2012 07:52:00 -0500, Swingman<[email protected]> wrote:
>> Hey ... with the obvious advancing state of magnetism, it could happen! ;)
>
> Even more ridiculous (or likely). A car passing a UPS truck and they
> get stuck together. :)
It happens to dogs ...
--
www.eWoodShop.com
Last update: 4/15/2010
KarlCaillouet@ (the obvious)
http://gplus.to/eWoodShop
"Robatoy" wrote in message
news:fabd09e1-bc72-4859-bce2-e5c8416e4d1c@b14g2000vbz.googlegroups.com...
On Mar 24, 9:20 pm, Leon <lcb11211@swbelldotnet> wrote:
> On 3/24/2012 2:16 PM, tiredofspam wrote:
>
> > Almost all of the rare earth magnets I have had eventually lose there
> > chrome or nickel. I have purchased from different vendors.
>
> > Is this because the ones I notice it are used to hold tools, and things
> > like the the drill chuck key.
>
> > Is it because they are banging the magnet?
>
> > Is it because the magnets are so strong the chrome just can't handle the
> > polarization?
>
> > Is it the quality of the magnets?
>
> There are better built rare earth magnets that will not chip and IIRC
> they do not have a thin chrome coating.
>
> Apparently an indestructible plastic coating protects these magnets.
>
> http://www.kjmagnetics.com/products.asp?cat=164
>
> And their other stuff.
>
> http://www.kjmagnetics.com/categories.asp
Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
muchly for that link there, Leon!
===============================================================
Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds pull.
I don't think I'd feel safe with that one.
On Mon, 26 Mar 2012 08:02:50 -0700, "CW" <[email protected]> wrote:
>sitting on the floor munching on a roll. She didn't want the roll, she just
>wanted to steal it. We have five cats. They're like little kids. Amazing how
>much trouble they can get in to.
I understand completely. Every time I'm in the kitchen munching on
something, my cat is there mewling up a storm until I give her some.
She never eats what I give her, she just wants some of what I'm
eating. Except of course for carrot muffin. *That* she likes and will
eat.
On Mon, 26 Mar 2012 09:28:24 -0500, Swingman <[email protected]> wrote:
>Here's where my canine companion stays when I'm at the computer:
>https://picasaweb.google.com/111355467778981859077/EWoodShopJustStuff#5723588834723567906
>She is, despite appearances, indeed alive.
That's a dog? Hell Karl, that dog is smaller than my cat. My cat isn't
angry at you any more, she's laughing.
"tiredofspam" <nospam.nospam.com> wrote in message
news:[email protected]...
> Almost all of the rare earth magnets I have had eventually lose there
> chrome or nickel. I have purchased from different vendors.
>
>
> Is this because the ones I notice it are used to hold tools, and things
> like the the drill chuck key.
>
> Is it because they are banging the magnet?
>
> Is it because the magnets are so strong the chrome just can't handle the
> polarization?
>
> Is it the quality of the magnets?
Yes, no, maybe, absolutely, and I don't have a clue.
Magnets have a lifetime, and can be affected by lots of things.
Temperature, percussion, strong magnetic fields, lots of things.
I just buy them in bulk, and if they are acting up, I order another 100.
I'm sorry, I have not kept track of suppliers and performance, but they're
so cheap, I don't mess with the details.
I have bought some through magnetsource.com, as well as others. All in all,
I'm satisfied with their performance when their previous generation is
considered.
Steve
I recon if the magnet is attached to a fixed object it would effectively
weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS
guy trying to get it out of his truck!
******************************************
Not an issue. The magnet would be shipped with a few inches of space
between it and the sides of the box so it will not stick. Besides, UPS
trucks are normally made of aluminum and fiberglass.
-- Jim in NC
On Mon, 26 Mar 2012 06:38:10 -0500, Swingman <[email protected]> wrote:
>> I recon if the magnet is attached to a fixed object it would effectively
>> weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS guy
>> trying to get it out of his truck!
>Good thing auto bumper are plastic these days ...
You're right. I can envision even a minor fender bender causing a car
and the UPS truck to get stuck together because he was delivering high
powered magnets.
On Sat, 24 Mar 2012 15:16:04 -0400, tiredofspam <nospam.nospam.com>
wrote:
>Almost all of the rare earth magnets I have had eventually lose there
>chrome or nickel. I have purchased from different vendors.
>
>
>Is this because the ones I notice it are used to hold tools, and things
>like the the drill chuck key.
>
>Is it because they are banging the magnet?
>
>Is it because the magnets are so strong the chrome just can't handle the
>polarization?
>
>Is it the quality of the magnets?
I've had the same luck. Some seemed to have chipped with only rare
use or contact.
I have taken the magnets out of hard drives.
But I am not concerned about the aesthetics of my shop stuff.
But I am about projects. When I sink a magnet as door catch I worry
about when it will look like shit.
On 3/26/2012 5:23 PM, Nick wrote:
> "tiredofspam"<nospam.nospam.com> wrote in message
> news:[email protected]...
>> Almost all of the rare earth magnets I have had eventually lose there
>> chrome or nickel. I have purchased from different vendors.
>>
>>
>> Is this because the ones I notice it are used to hold tools, and things
>> like the the drill chuck key.
>>
>> Is it because they are banging the magnet?
>>
>> Is it because the magnets are so strong the chrome just can't handle the
>> polarization?
>>
>> Is it the quality of the magnets?
>
> Is it the fact that the magnets lose their chrome or nickel plating that
> bugs you? Or that the magnets are no longer effectively useful?
> I use magnets all over the place. Good sources are from stripped magnetrons
> from microwaves (quite powerful, ferrous)[1] and stripped out hard drives
> (good quality, powerful, rare earth magnets)[2].
> I'm generally not too much bothered by the aesthetics.
>
> [1] Your own, neighbours, skips etc. These also yield a bunch of screws and
> other bits.
> [2] OK, you're the bloke who has never had a HDD fail.
>
> No offence meant or intended,
>
> Nick.
>
>
On 3/25/2012 10:46 AM, tiredofspam wrote:
> Thanks, Have you used the rubber units?
> I hadn't seen them before. For some items that makes sense.
> For others not sure. I think I like the chrome look.
>
> But for shop stuff the rubber will solve the problem. Nice the fact that
> they become less prone to slide.
>
> On 3/24/2012 9:20 PM, Leon wrote:
>> On 3/24/2012 2:16 PM, tiredofspam wrote:
>>> Almost all of the rare earth magnets I have had eventually lose there
>>> chrome or nickel. I have purchased from different vendors.
>>>
>>>
>>> Is this because the ones I notice it are used to hold tools, and things
>>> like the the drill chuck key.
>>>
>>> Is it because they are banging the magnet?
>>>
>>> Is it because the magnets are so strong the chrome just can't handle the
>>> polarization?
>>>
>>> Is it the quality of the magnets?
>>>
>>
>> There are better built rare earth magnets that will not chip and IIRC
>> they do not have a thin chrome coating.
>>
>> Apparently an indestructible plastic coating protects these magnets.
>>
>> http://www.kjmagnetics.com/products.asp?cat=164
>>
>> And their other stuff.
>>
>>
>> http://www.kjmagnetics.com/categories.asp
No, I have not tried any of those magnets.
On 3/25/2012 6:12 PM, CW wrote:
>
>
> "Robatoy" wrote in message
> news:fabd09e1-bc72-4859-bce2-e5c8416e4d1c@b14g2000vbz.googlegroups.com...
>
> On Mar 24, 9:20 pm, Leon <lcb11211@swbelldotnet> wrote:
>> On 3/24/2012 2:16 PM, tiredofspam wrote:
>>
>> > Almost all of the rare earth magnets I have had eventually lose there
>> > chrome or nickel. I have purchased from different vendors.
>>
>> > Is this because the ones I notice it are used to hold tools, and things
>> > like the the drill chuck key.
>>
>> > Is it because they are banging the magnet?
>>
>> > Is it because the magnets are so strong the chrome just can't handle
>> the
>> > polarization?
>>
>> > Is it the quality of the magnets?
>>
>> There are better built rare earth magnets that will not chip and IIRC
>> they do not have a thin chrome coating.
>>
>> Apparently an indestructible plastic coating protects these magnets.
>>
>> http://www.kjmagnetics.com/products.asp?cat=164
>>
>> And their other stuff.
>>
>> http://www.kjmagnetics.com/categories.asp
>
> Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
> muchly for that link there, Leon!
> ===============================================================
> Check out their largest one. 4" diameter x 2" thick. Over 1000 pounds
> pull. I don't think I'd feel safe with that one.
I recon if the magnet is attached to a fixed object it would effectively
weigh 1000 lbs. Probably would not be a hazard. BUT Imagine the UPS
guy trying to get it out of his truck!
On 3/25/2012 11:50 AM, Robatoy wrote:
> On Mar 24, 9:20 pm, Leon<lcb11211@swbelldotnet> wrote:
>> On 3/24/2012 2:16 PM, tiredofspam wrote:
>>
>>> Almost all of the rare earth magnets I have had eventually lose there
>>> chrome or nickel. I have purchased from different vendors.
>>
>>> Is this because the ones I notice it are used to hold tools, and things
>>> like the the drill chuck key.
>>
>>> Is it because they are banging the magnet?
>>
>>> Is it because the magnets are so strong the chrome just can't handle the
>>> polarization?
>>
>>> Is it the quality of the magnets?
>>
>> There are better built rare earth magnets that will not chip and IIRC
>> they do not have a thin chrome coating.
>>
>> Apparently an indestructible plastic coating protects these magnets.
>>
>> http://www.kjmagnetics.com/products.asp?cat=164
>>
>> And their other stuff.
>>
>> http://www.kjmagnetics.com/categories.asp
>
> Wowsers!! What a wealth of tinker/prototype/jig solutions..Thankee
> muchly for that link there, Leon!
They do have a load if info and a wide variety, some of those magnets
look lake fleas.
"Lee Michaels" wrote in message
news:[email protected]...
"Leon" <lcb11211@swbelldotnet> wrote
>
> Nope, not what I said, I said nothing about affixed. I said if the
> magnet is attached to a "fixed" object. Read that as an object that is
> attached to something that will not allow it to move. The fixed object
> could be 2 lbs but if bolted/fixed to a 10 ton block of cement.... ;~)
I believe that the "pound" rating of pull is the amount of force that it
takes to remove the magnet from another magnet of the same strength. Like
all those "horsepower" ratings ate Sears. The actual amount of weight it
can lift/attract is much smaller. Anyway, I read that from a manufacturer.
It was buried in the small print, of course.
But don't mind me guys. Keep this mad scientist fantasy thing going here.
;)
==========================================================================
These guys tell you on their site how they test them. The rating is for one
magnet stuck to a ground steel plate.