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[Source] Magnetized Pliers

Strange question for the group. I used my favorite pliers to make
some magnetic clasp/chain extenders and now the pliers are
magnetized. How on earth do I de-magnetize them. They are very
irritating when allthey do is stick to other pliers.

Thanks
Bernadette Johnson

Strange question for the group. I used my favorite pliers to make
some magnetic clasp/chain extenders and now the pliers are
magnetized. How on earth do I de-magnetize them. They are very
irritating when allthey do is stick to other pliers. 

Passing the pliers through a coil of wire energized with an
alternating current should do the trick. but, I can’t think of a
convenient (or safe) way to do that. The outside of an unshielded
motor (e. g., table top fan) might have enough of a field to do
the trick but I really don’t know. Rube Goldberg (me) might try
something like making a few dozen turns of copper wire around a
hollow form and putting it in series with a light socket with a 60
watt bulb, to keep the current through the coil to a reasonable
level, in it but there are hazards with this approach.

alonzo

Any watch tool company has magnetizer/demagnetizers (Gesswein,
Esslinger, Borel) under $100. Electric coil that makes a magnetic
field. pass tool through on direction it’s magnetized opposite way
demagnetized. Reversing polarity. First shop 40 years ago had a
homemade one from a motor coil. Im sure there is a utube somewhere on
making one. Gary

How on earth do I de-magnetize them. 

If you know a TV shop which still works on old tube sets, they will
probably have a degausser, which is just a coil of wire hooked up to
AC current. Anything which produces a fluctuating magnetic field
would work.

Al Balmer

Heat the metal beyond its Curie point.

John

Heat the metal beyond its Curie point. 

Which is beyond red hot, in the order of 1500 F. It’s a little
tricky. The steel tends to lose carbon unless heated in an inert
atmosphere or coated with a powder made for the purpose. It then has
to be quenched (probably in oil) and then tempered. Easier to use a
degaussing coil. Nice to know this is a tool used by
watchmakers/repairmen.

Al Balmer

Demagnetisers are really very cheap. Take a look at these. You just
switch it on and insert the item to be demagnetised into the cavity
and withdraw it slowly.

Strange question for the group. I used my favorite pliers to make
some magnetic clasp/chain extenders and now the pliers are
magnetized. How on earth do I de-magnetize them. They are very
irritating when allthey do is stick to other pliers. 

See if you can find an old-school TV repair shop. They have a tool
called a degaussing coil. They were commonly needed for the old CRT
monitors, but many older shops still have one tucked away in the
back. Some machine shops have a similar tool to degauss tool bits.

An alternate, but less reliable, method is several light strikes
with a hammer (not enough to mark or deform the tool) to “reset” the
grain structure, or to heat the tool to the non-magnetic temperature.

Ron Charlotte
Gainesville, FL