FOR SALE Neodymium Rare Earth NdFeB magnets. Permanent Rare Earth NdFeB magnets.
Rare
Earth Magnets
Neodymium magnets are a member of the Rare Earth magnet family and are
the most powerful permanent magnets in the world. They are also referred
to as NdFeB magnets, or NIB, because they are composed mainly of Neodymium
(Nd), Iron (Fe) and Boron (B). They are a relatively new invention and
have only recently become affordable for everyday use.
Licensing
Issues
Because neodymium magnets are an invention, they are covered under U.S.
patent laws. All neodymium magnets sold in the United States are required
by law to be licensed by the patent holders. All of our magnets are
licensed and legal for sale in the U.S. and North America. Many of the
cheap neodymium magnets sold elsewhere are not licensed, and therefore,
not legally allowed to be sold in the U.S. (The license adds 20-40%
to the cost of the magnets). If you are inventing or using neodymium
magnets in an assembly or retail product, you must consider the legal
issues related to neodymium patents to avoid hassles in the future.
Grades
of Neodymium
N35, N38, N42, N38SH...what does it all mean? Neodymium magnets are
all graded by the material they are made of. As a very general rule,
the higher the grade (the number following the 'N'), the stronger the
magnet. The highest grade of neodymium magnet currently available is
N50. Any letter following the grade refers to the temperature rating
of the magnet. If there are no letters following the grade, then the
magnet is standard temperature neodymium. The temperature ratings are
standard (no designation) - M - H - SH - UH - EH. You find the temperature
rating of each grade on our Specifications
of Neodymium Magnets Page.
Platings/Coatings
Neodymium magnets are a composition of mostly Neodymium, Iron and Boron.
If left exposed to the elements, the iron in the magnet will rust. To
protect the magnet from corrosion and to strengthen the brittle magnet
material, it is usually preferable for the magnet to be coated. There
are a variety of options for coatings, but nickel is the most common
and usually preferred. Our nickel plated magnets are actually triple
plated with layers of nickel, copper, and nickel again. This triple
coating makes our magnets much more durable than the more common single
nickel plated magnets. Some other options for coating are zinc, tin,
copper, epoxy, silver and gold. Our gold plated magnets are actually
quadruple plated with nickel, copper, nickel and a top coating of gold.
Machining
Neodymium material is brittle and prone to chipping and cracking, so
it does not machine well by conventional methods. Machining the magnets
will generate heat, which if not carefully controlled, can demagnetize
the magnet or even ignite the material which is toxic when burned. It
is recommended that magnets not be machined.
Demagnetization
Rare Earth magnets have a high resistance to demagnetization, unlike
most other types of magnets. They will not lose their magnetization
around other magnets or if dropped. They will however, begin to lose
strength if they are heated above their maximum operating temperature,
which is 176°F (80°C) for standard N grades. They will completely lose
their magnetization if heated above their Curie temperature, which is
590°F (310°C) for standard N grades. Some of our magnets are of high
temperature material, which can withstand higher temperatures without
losing strength.
Strength
If you've never handled neodymium magnets before, you will be amazed
at their strength. Neodymium magnets are over 10x stronger than the
strongest ceramic magnets. If you are currently using ceramic magnets
in your project, you could probably use a much smaller neodymium magnet
and have greater holding force. You can get an idea of the relative
strength of each of our magnets on our Pull
Force Table Page.
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Wind turbine magnets,
Permanent Rare Earth NdFeB Neodymium magnets wholesale for rotors, motors, generators, alternators, or custom built wind turbines.
A wide and growing variety of strong Neodymium Magnets in stock and ready to ship. These are strong magnets in a nickel-plated steel casing
that allows the magnets to be easily installed into a generator of a small
wind turbine project or hydro power station’s rotor. The shapes in the stock
include discs, cylinders, blocks, cubes, spheres, rings, cones, pyramids,
triangles, stars. One style of magnets comes with a hook attached, which
can be incredibly handy on your fridge, in your locker, garage or shop.
The
neodymium magnets are extremely strong, and must be handled
with care to avoid personal injury and damage to the magnets. Fingers
and other body parts can get severely pinched between two attracting
magnets. Neodymium magnets are brittle, and can peel, crack or shatter
if allowed to slam together. Eye protection should be worn when handling
these magnets, because shattering magnets can launch pieces at great
speeds.
