WORLDWIDE MANUFACTURER andDISTRIBUTOR Since 1941Magnetic Shield Corporation, a division of Perfection Mica Company, is the premier supplier of custom magnetic shielding alloys and custom Built shields.
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Custom Magnetic Shields and Production Volumes
Magnetic Shield Corporation provides fabricated shields to thousands of customers worldwide. MuMETAL® Stress Annealed Alloy is used for fabrication because of its soft nickel-iron alloy composition, and highest permeability properties - see more about material selection below. Our shop produces custom shield prototypes, from fabrication to final anneal processing*. Using machine shop equipment and stock tooling, your hand-crafted sample is manufactured accurately to spec. Whether you need one prototype or hundreds for validation testing, send your sketch or drawings here so we may provide you with a timely quote. For production quantities, contact our Sales Department for annual or production volume pricing.
Ask us about Design Reviews and Site Surveys. Let us assist you now with our Engineering expertise and support.
* Perfection Annealing is required after machining, forming, forging, or welding to provide maximum shielding performance. Read more
Lab Testing, Evaluation, Alloy Sampling and Shield Prototyping
We’ve helped Electrical Engineers, Designers and other technical professionals to
prototype, sample and fabricate custom magnetic shields for 75 years as of 2016. Using one of our "hands-on" Evaluation Test Kits, you can prototype
your shield with everyday common hand-tools, or bench-top equipment.
Once your prototype is complete, we can fabricate more accurate
validation samples or pre-production parts to your specifications or
drawings. With an extensive range of equipment and tooling, our
quick-turn prototyping and annealing services are regularly used by
customers for fit and functional testing, prior to production builds. All three of our Evaluation Lab Kits now contain MuMETAL® Foil and Sheet samples, in addition to Co-NETIC® alloy with high attenuation properties and NETIC® alloy for high saturation applications.
We offer a full range of Manufacturing services:
MuMETAL® For Fabrication of Precision Parts and Enclosures
Laser Cutting Magnetic
Shield Corporationcan laser cut our
MuMETAL®, Co-NETIC®, and NETIC® materials which provide high accuracy, high
quality parts, or precise blank
sizes. Using a laser provides clean cut edges
without burr or dust formation.
With a LVD Easy-Form® press brake, our stress annealed sheet material can be formed
with predetermined bends by clamping the work piece between a matching punch
and die. The precision-ground tooling assures accurate bend angles along the
entire bending length.
Metal Spinning A metalworking process
performed on a lathe. It is the forming of an axis-symmetric part over a
rotating mandrel. Force is delivered by a tool with a rounded end or a roller.
A flat, or possibly preformed, work piece is held between a mandrel and tail
stock. As the apparatus rotates, the tool applies localized pressure to the
work while it gradually moves up the mandrel. This causes the sheet metal work
to be wrapped over the mandrel, taking its shape.
Deep-Drawn MuMETAL® Shielding Cans MuMETAL® Deep Draw Coil is
available for stamping and forming ofMuMETAL® Shielding Cans which provide
excellent low frequency magnetic field attenuation with low coercive forces and
are used in many industries for protecting critical devices from magnetic
interference, electromagnetic radiation and cross-talk signals. Products using
MuMETAL® magnetic shielding cans include high-end audio amplifiers, current
transformers, specialty transformers and other distinct electrical/electronic
& printed circuit board (PCB) components. Our cans are easily integrated
into circuits so this shielding method may be found in audio, automotive,
automation, power supply and power generation sectors.
We also produce specific form
tooling and custom size production cans for many of our clients. Manufacturing
new tooling normally takes approximately six weeks before supply of the first
prototypes for approval but we can produce hand-made prototypes of a new design
in 2-3 weeks to verify the product prior to any tool cost being incurred.
All of our shielding enclosures can
be supplied with either inside or outside tight fitting Lids, creating a
6-sided shielding enclosure. MuMETAL® Cans are not automatically supplied with
Lids; if you require them for your application, please specify this at the time
of placing your inquiry. All of our Lids and Cans may be further machined
to include holes/slots configured for your wiring requirements. Typically, our
high permeability (µ) 80% nickel-iron MuMETAL® Cans are shipped as is since our
AA Perfection Annealing method provides a bright nickel appearance after
anneal. We do offer other finishes including plating, electro-polish, powder
coating and paint. Small order quantities of Cans, larger dimension sizes, or
thicker material can be fabricated using traditional methods, including
Spinning, CNC forming and TIG welding.
CNC Precision Machined Tubing Low To High Volume Production
With our NEW MuMETAL® Round Bar in-stock, we can precision CNC Machine MuMETAL® Tubes or Pipes, producing hundreds of thousands of Tubular components. MuMETAL® Bar is typically specified for electrical and electronic technical applications requiring a magnetic shielding alloy with a high permeability property to reduce low field disturbances. Other uses of Mu Bar include production of precision machined or forged components such as current sensors, current transformer cores, or ground fault circuit breaker relay parts. CNC or computer controlled machines run automated processes that are highly precise and result in quality manufactured parts, components, or products. Tube bending, cutting, flaring, swaging, and shaping are some processes that may be selected in the design and production of MuMETAL® tubes. Rapid production runs, high volume parts, close tolerance, and cost efficiency are realized benefits of CNC technology.
Attach your design drawing specs for custom tubing fabrication when submitting a Request for Quote.
Finishing After a full magnetic anneal, MuMETAL® and Co-NETIC® shielding alloys exhibit a clean, bright surface condition. Also, because of its high nickel content, these
alloys are corrosion resistant. Consequently, MuMETAL® and Co-NETIC® shielding alloys are usually used as annealed, without further finishing operations. But, there is a variety of finishing operations available to customers requiring additional corrosion resistance or cosmetically pleasing finished parts. Other purposes for finishing include preparing surfaces for paint adhesion and achieving a specific micro-inch (µin) finish.
We can offer the following Finishing services:
If your process or machines shear, plasma cut, water jet, punch, laser, or mill, there will be burrs. There are many manual machines and automatic machines that can remove burrs for ensuring the functionality of the machined part, as well as the safe handling of the part.
With a Fladder® Danmark A/S machine we can deburr or sand work pieces from all angles within the four parameters which are normally synchronized in pairs. If the RPM of the abrasive tools or the feed speed of work pieces is altered, the other parameters change automatically. Each function may also be 100% manually operated.
Also, with a metal vibratory finishing machine we can deburr products and remove sharp edges. Your parts are placed inside a drum filled with abrasive pellets and a substrate, then tumbling vibration is used to create a uniform random texture. The machine’s cycle speed and magnitude of vibration are usually variable, allowing effective treatment for a range of small- to large-sized parts.
Aqua Blasting Aqua blasting also known as vapor blasting, is a wet blasting process utilizing 100/150 micron glass media suspended in a high pressure water system - unlike shot blasting this process is non-aggressive. Aqua/Vapor Blasting is both highly effective and gentle at the same time - the process cleans very effectively without removing any other underlying metal or substrate. This allows for the cleaning of delicate parts arnd soft metals like MuMETAL® and Co-NETIC® alloys.
Design Reviews Upon receipt of your custom design by drawing and/or specification,
our technical team can review your design, provide valuable input, and
fabricate your shield. As an
ISO 9001:2008 certified supplier, we are
prepared to manufacture to your specifications. We are a diverse
company, offering a broad range of production capabilities and
Our engineers are available to perform site surveys under a
consulting contract agreement, reporting our recommendations of how to
mitigate EMI/EMF disturbances.
For fabricated shields, we use MuMETAL® Stress Annealed Alloy.
Engineers and Buyers beware: MuMETAL® is a registered brand of Magnetic Shield Corporation.
We do not Engineers and Buyers beware: MuMETAL® is a registered brand of Magnetic Shield Corporation. proprietary brand that we certify to
exacting quality standards and material specifications. MuMETAL® is the most commonly used shielding alloy because of its reputation as a highest permeability shielding alloy available. MuMETAL® is generally available for fabrication and must be annealed after welding, forming or bending. Need more sample material or larger sizes? We can shear or slit our stock sizes to meet your needs. Most of our alloys are sold by the
foot so you can purchase in small quantity for further evaluation and sampling.
Engineering Support and Quotes
You are invited to call our Engineering Department to discuss your
design requirements and to send a sketch or drawing for a prompt
quotation. And, with our decades of hands-on experience, you can be
certain you are not wasting valuable time or funding.
Magnetic Shield Corporation
Perfection Mica Company
740 N. Thomas Drive
Bensenville, IL 60106 USAE: email@example.com
P: 888-766-7800 / 630-766-7800
F: 630-766-2813 www.magnetic-shield.com
MuMETAL®, MuRoom®, Co-NETIC®, NETIC®, AA CABLE SHIELD® and INTER-8® CABLE are registered trademarks of Magnetic Shield Corporation, and use of our brands is not permitted without the express written permission of Magnetic Shield Corporation. All rights reserved.Magnetic Shield Corporation FAQ