WORLDWIDE MANUFACTURER and  DISTRIBUTOR Since 1941 Magnetic 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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FABRICATION CAPABILITIES

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Custom Magnetic Shields and Production Volumes
Magnetic Shield Corporation provides fabricated shields to thousands of customers worldwide. For fabricated shields, we use MuMETAL® Stress Annealed Alloy - see more about our material selection below. If you need a prototype shield made, our shop can fabricate it and Perfection Anneal* it for you. Our machine shop hand-crafts an accurate sample using machine shop equipment and stock tooling. 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 --- we can 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


Fabricated Box Fabricated CylinderFabricated EnclosureCustom Fabricated Shape 


Lab Testing, Evaluation, Alloy Sampling and Shield PrototypingLab Kits Brochure
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

• Water-jet  

Round or Rectangular Cans

• Chemical Etching

• Welding (Spot, Heliarc, Laser)

 

MuMETAL® Deep Draw Coil for stamping and forming of shielding cans 

Forming

Bending

  and custom enclosures. Read more

• Stamping

• Rolling

 

• Punching

Deep-drawing   > VIEW VIDEO

 

CNC Machined Tube or Pipe

• EDM Shearing

• Slitting

 

MuMETAL® Round Bar is available for machined or forged tubing and

Metal Spinning

• Milling

  precision parts. Read more

• Core Winding

• Drilling

 

• Boring

• Winding 

  Perfection Annealing Services to Attain Optimum Magnetic Properties

• CNC Machining

    Perfection Annealing heat treatment process is required after machining, forming, forging, or welding to provide maximum shielding performance. Read more
Finishing services Aqua Blasting    
Deburring Magnetic Annealing Services    



Laser Cutting
Magnetic Shield Corporation can 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.


Laser Cutting



Bending
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.

Bending

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, thus taking its shape.

Metal Spinning


Deep-Drawn MuMETAL® Shielding CansMuMETAL® Deep Draw Coil
MuMETAL® Deep Draw Coil is available for stamping and forming of MuMETAL® 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.

Smaller quantities of Cans, or Cans that may be of larger size, or of a thicker material can be fabricated using traditional methods, including Spinning, CNC forming
and TIG welding.

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VIEW VIDEO:
Deep-Drawn MuMETAL® Cans: Low-frequency EMI Shielding


MuMETAL® Cans


MuMETAL® Tubing Produced From Round MuBar

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:

Aqua Blasting

Painting

Deburring

Plating

Electro-polishing

Powder Coating

Sand Blasting

Grinding

Polishing

Sanding



 
Deburring
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.


 Fladder® Danmark A/S MachineDeburring - Metal Vibratory Finishing Machine


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 Review
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 solutions.


Site Surveys
Our engineers are available to perform site surveys under a consulting contract agreement, reporting our recommendations of how to mitigate EMI/EMF disturbances.

Material Selection
For fabricated shields, we use MuMETAL® Stress Annealed Alloy. Engineers and Buyers beware: MuMETAL® is a registered brand of Magnetic Shield Corporation.
We doMuMETAL® Alloy not support other companies that sell shielding materials they claim are "mumetal" - it is not a generic name but a registered, 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.

Send quote requests with drawings or specifications to us, or contact our Engineering Department with any specific questions.


Request Quote  - Fabrication  Fill out our quick form.  Enter your comments/questions and click.
Submit to send us an email.  You may attach a design drawing file for review.  Thanks!

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