Magnetics Business & Technology - July/August 2024 - 4

EDITOR'S CHOICE
A Lifting Magnet's Neo Is Almost Immortal, Notes WalMag,
but Safety Inspections of the Product Should Be Done
Regularly
Volume 23, Issue 4
High-quality neodymium
in the magnetic core of an
industrial lifting magnet
is almost immortal, notes
Walmag of Czech Republic,
a long-time producer of
lifting magnets and chucks
- but safety inspections
of the full product should
be conducted regularly.
Some of the intricacies
and rationale for this are
explained by the company
in a helpful presentation
available on their website.
This article highlights a
few key points.
High-quality lifting magnets and magnetic chucks can last many years, they're almost
indestructible. They still need regular service and inspection, though-especially load lifting
magnets. Only a regularly inspected lifting magnet can be considered 100% safe and
yearly inspections can be required by law. During the inspection, a pull-off test is performed
to make sure the magnet has a sufficient power reserve. Only authorized inspectors can
inspect certified lifting magnets and issue an inspection certificate.
The magnets themselves
have a very
long service life. The
magnetic core in a lifting
magnet or a magnetic
chuck is hidden inside
the device, protected
from adverse effects
and less-than-ideal
external conditions. This
means that high-quality
neodymium magnets
rarely get damaged,
don't degrade and don't
lose their magnetic
force.
As a result, servicing a magnet often means servicing every other part but the magnet. The
most serviced components of a lifting magnet are usually the plates or the switch lever.
These are most subjected to pressure and tension when the magnet is being used, so they
wear out more quickly than other parts of the magnet.
The most expensive part of a magnet is the magnetic core (made of neodymium, iron and
boron) and the rotor. A rotor rarely needs to be replaced and a magnetic core doesn't degrade.
Replacing all other components of a magnet is always less expensive than getting a
new one, says the company.
A Czech manufacturer of top lifting magnets, magnets for clamping during machining and
demagnetizers, WalMag knows about longevity in the field of magnetics. An outgrowth of
the historic O.S. Walker Company founded in 1897 by Oakley S. Walker, inventor of the
electromagnetic chuck, WalMag traces the roots of its present operation back 30 years as
Walker Pilana Magnetics before coming under independent Czech ownership in 2011.
For more info and the full presentation, see www.walmagmagnetics.com.
4 Magnetics Business & Technology * July/August 2024
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Magnetics Business & Technology - July/August 2024

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