How Is Lifting Magnets Helpful For Heavy Load Operations?

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How Is Lifting Magnets Helpful For Heavy Load
Operations?
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Types of Magnetic Lifters
There are three types of lifting magnets
permanent, electromagnet and electro-permanent.
While they all can safely transport heavy loads,
each type has its application specific advantages.
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Electromagnetic lifters use an energized
electrical coil wound around a steel core
embedded in the lifter to generate the magnetic
field. A D.C. controller or rectifier provides
the excitation voltage to energize the magnet.
Permanent magnet lifters, made from rare earth or
ceramics materials, use permanently magnetized
material to generate the lifter's magnetic field
or holding force. They do not require electrical
power, which eliminates hazards caused by power
interruptions and gives them the added benefit of
portability. 
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Electro-permanent magnetic lifters are a
combination of the permanent and electromagnetic
types. They use permanent magnetic material that
is turned on or off by a D.C power supply, which
can be supplied by a D.C. controller or a
battery, but electricity is not required at all
times. 
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Retrieving and Scrap Applications
 Eliminate Drilling Tap Holes the need to drill
and tap holes in materials prior to lifting is
many times required to obtain an anchor point or
eyebolt to latch onto. In many instances after
lifting, the eyebolts need to be removed and the
holes filled up, which can add to the cost of the
product.  Easily Palletized Lifting Magnets
are particularly useful if individual parts from
a stack or crate of parts need to be moved. By
accessing the part with a lifting magnet, it can
be lifted vertically out of the crate or stack.
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Magnet lifters are the perfect solution for
retrieving material from obscure,
difficult-to-reach, or dangerous places. They are
commonly used in underwater applications to
retrieve metal from a damaged submerged vessel
like a sunken ship or wrecked oil well. Lifting
magnets in these applications are called
retrieving magnets.
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