is there an easy way to demagnetize a screwdriver?
- Thread starter thirtythree
- Start date
I'm assuming a lighter wouldn't be enough?Originally posted by: Eli
Torch.
Don't melt the handle.
edit: doesn't look like it.
It might....Originally posted by: thirtythree
I'm assuming a lighter wouldn't be enough?Originally posted by: Eli
Torch.
Don't melt the handle.
In that case, don't blow your hand off(by keeping the lighter lit for minutes at a time)... lol
maybe I don't really need to demagnetize it, but I've heard it's bad to use a magnetized screwdriver on your computer. it's only powerful enough to hold one tiny screw up...
bah I wouldn't worry. I've been using magnetic screwdrivers on computer for years. Nothing has gone wrong as far as I can tell, and they're a really convenient way to get those itty bitty screws that can get away from you.
it's not going to damage your computer... just annoy the crap out of you.
/hates magnetized screw drivers
/hates magnetized screw drivers
SunnyD
Belgian Waffler
Yep.
Little physics. Using an induction coil, you can magnetize a ferrous, nickle or a couple other elemental metal objects. The reason for magnetism, and why using an induction coil works is that a strong enough field will "polarize" the metal atoms so that they all face a certain direction. Once polarized, each atom no longer has a random magnetic field, rather they are all polarized into the same direction making the resultant field stronger and pronounced.
Okay, so how do you unmagnetize something? Well, you have to randomize the metal atoms in the object so that their individual fields are not all polarized. You will never completely get rid of a polar magnetic field on an object, but it can be weakened to an extent where it's almost non-discernable (ie: only able to pick up tiny grains of dust). In a solid metal object, you have to either melt the metal (high kinetic energy + randomization) or whack the object several times hard enough to "knock" enough of the molecular atoms around to weaken the field.
There, that was fun.
BTW: I don't suggest using an induction coil to magnetize something without a strong vise or something to hold the object. One word: railgun.
Originally posted by: SunnyD
Yep.
Little physics. Using an induction coil, you can magnetize a ferrous, nickle or a couple other elemental metal objects. The reason for magnetism, and why using an induction coil works is that a strong enough field will "polarize" the metal atoms so that they all face a certain direction. Once polarized, each atom no longer has a random magnetic field, rather they are all polarized into the same direction making the resultant field stronger and pronounced.
Okay, so how do you unmagnetize something? Well, you have to randomize the metal atoms in the object so that their individual fields are not all polarized. You will never completely get rid of a polar magnetic field on an object, but it can be weakened to an extent where it's almost non-discernable (ie: only able to pick up tiny grains of dust). In a solid metal object, you have to either melt the metal (high kinetic energy + randomization) or whack the object several times hard enough to "knock" enough of the molecular atoms around to weaken the field.
There, that was fun.
BTW: I don't suggest using an induction coil to magnetize something without a strong vise or something to hold the object. One word: railgun.
This man speaks truth!!
I may know Jack Schitt, but one thing I DO know is magnets. Father owns his own magnetic fabrication plant
i worked there all through high school, as much as I hated it.
Originally posted by: Eli
It might....Originally posted by: thirtythree
I'm assuming a lighter wouldn't be enough?Originally posted by: Eli
Torch.
Don't melt the handle.
In that case, don't blow your hand off(by keeping the lighter lit for minutes at a time)... lol
The Curie temperature of iron is 1043K, and even though the various alloys of steel have lower Curie temperatures, I'd doubt that the lighter would work.
Damn... It must've sucked to work in a magnetic factory.. Your tools always flying out of your hands and sticking to the walls and sh!t....Originally posted by: Shockwave
Originally posted by: SunnyD
Yep.
Little physics. Using an induction coil, you can magnetize a ferrous, nickle or a couple other elemental metal objects. The reason for magnetism, and why using an induction coil works is that a strong enough field will "polarize" the metal atoms so that they all face a certain direction. Once polarized, each atom no longer has a random magnetic field, rather they are all polarized into the same direction making the resultant field stronger and pronounced.
Okay, so how do you unmagnetize something? Well, you have to randomize the metal atoms in the object so that their individual fields are not all polarized. You will never completely get rid of a polar magnetic field on an object, but it can be weakened to an extent where it's almost non-discernable (ie: only able to pick up tiny grains of dust). In a solid metal object, you have to either melt the metal (high kinetic energy + randomization) or whack the object several times hard enough to "knock" enough of the molecular atoms around to weaken the field.
There, that was fun.
BTW: I don't suggest using an induction coil to magnetize something without a strong vise or something to hold the object. One word: railgun.
This man speaks truth!!
I may know Jack Schitt, but one thing I DO know is magnets. Father owns his own magnetic fabrication plant
i worked there all through high school, as much as I hated it.
1043ºK = 1417ºF... so, yeah.. probably not with the lighter.Originally posted by: cquark
Originally posted by: Eli
It might....Originally posted by: thirtythree
I'm assuming a lighter wouldn't be enough?Originally posted by: Eli
Torch.
Don't melt the handle.
In that case, don't blow your hand off(by keeping the lighter lit for minutes at a time)... lol
The Curie temperature of iron is 1043K, and even though the various alloys of steel have lower Curie temperatures, I'd doubt that the lighter would work.
Red Squirrel
No Lifer
Rub a hard drive magnet on it.
To remagnetize put it in a coil and apply DC power. I usually use the 12v rail of a computer psu. Make your coil a couple ohms and the psu will not see it as a short and not shut down. I usually leave it for like 30 seconds.
To remagnetize put it in a coil and apply DC power. I usually use the 12v rail of a computer psu. Make your coil a couple ohms and the psu will not see it as a short and not shut down. I usually leave it for like 30 seconds.
dave_the_nerd
Lifer
- Feb 25, 2011
- 16,980
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Yeah, no danger to a computer.
And a non-magnetized screwdriver is like $0.50 at any hardware store, Mr. OP who was a cheapskate 11 years ago.
And a non-magnetized screwdriver is like $0.50 at any hardware store, Mr. OP who was a cheapskate 11 years ago.
EliteRetard
Diamond Member
- Mar 6, 2006
- 6,490
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twinrider1
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- Sep 28, 2003
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