Stackable U-Core Assemblies Using Neodymium Magnets

Stackable U-Core Assemblies Using Neodymium Magnets

Precision and efficiency for modern applications

Executive Summary

Neodymium magnets play a critical role in modern electromagnetic systems where high magnetic strength, precision, and repeatability are required. In this case study, Allstar Magnetics highlights its Stackable U-Core assemblies—a scalable, cost-effective solution engineered to support rapid prototyping, design validation, and production ramp-up across demanding applications.

What Are Stackable U-Core Assemblies Using Neodymium Magnets?

Modular & Stackable U-Core assemblies using neodymium magnets are configurable electromagnetic components designed to deliver strong, consistent magnetic fields while maintaining manufacturing flexibility. By combining standardized U-Core geometries with high-energy neodymium magnets, these assemblies reduce lead times, lower tooling costs, and allow engineers to validate designs quickly without sacrificing performance.

Neodymium Magnets U-Core Assemblies

System Benefits

  • High magnetic strength in compact electromagnetic assemblies
  • Standardized designs with multiple configuration options
  • Lower cost compared to fully custom tooling or machining
  • In-stock components for immediate assembly and shipment
  • Cost-effective prototyping for rapid design validation
  • Optional bobbins available to support winding and integration requirements
  • Scalable architecture that supports transition from prototype to production

Key Applications for Neodymium Magnet U-Core Assemblies

  1. High Voltage Transformers: Efficient voltage conversion and regulation for industrial and commercial power supplies.
  2. High-Frequency (HF) Filters Reduction of noise and unwanted frequencies in power electronics and RF applications.
  3. Security Detection Equipment: Aviation security explosive detection systems (EDS) requiring precision and reliability.
  4. Renewable Energy Systems: Power inverters for solar and wind energy conversion where performance consistency is critical.

From Concept to Manufacture: Allstar’s Engineering-Led Approach

Since 1989, Allstar Magnetics has specialized in the development and manufacturing of custom magnetic solutions utilizing neodymium magnets and precision steel components. Our expertise lies in translating complex magnetic requirements into manufacturable, repeatable assemblies.

For Stackable U-Core assemblies, Allstar applies custom CNC tapping, specialty-grade steel backings, and tightly controlled assembly processes to ensure structural integrity and electromagnetic performance. Whether designing flat or U-channel configurations, our engineering team evaluates each project through a manufacturability-first lens.

Corner   Part number: B67410-A0250-X187 N87 material
Neodymium Magnets

Manufacturing Considerations for Neodymium Magnet Assemblies

  • Temperature and environmental effects on magnetic performance and manufacturing processes
  • Adhesive selection based on humidity, heat, vibration, and outgassing requirements
  • Machining tolerances influenced by material properties and assembly methods
  • Repeatability and scalability for long-term production programs

Why This Matters for Engineering Teams

Engineering teams selecting neodymium magnet assemblies often face trade-offs between performance, cost, and lead time. Allstar’s approach reduces those trade-offs by offering a configurable, in-stock solution that accelerates development while preserving design flexibility.

Spacer   Part number: B67410-A0249-X187 N87 material
Neodymium Magnets - Spacer

Results and Long-Term Value

Allstar’s proprietary, highly repeatable manufacturing process enables customers to move confidently from prototype to production. By minimizing custom tooling and leveraging architectures, customers benefit from faster timelines, lower upfront costs, and dependable electromagnetic performance over the life of their programs.

Leg   Part number: B62110-A6018-X087 N87 material
Neodymium Magnets - Leg

Frequently Asked Questions

Why use neodymium magnets in U-Core assemblies?

Neodymium magnets provide high magnetic energy density, allowing compact designs with strong, consistent magnetic fields.

Are stackable U-Core assemblies customizable?

Yes. Stackable designs allow configuration changes without the cost or delay of fully custom tooling.

Can these assemblies scale to production volumes?

Yes. Allstar designs modular U-Core assemblies with repeatability and production scalability in mind.

What industries benefit most from neodymium U-Core assemblies?

Industries include power electronics, renewable energy, security systems, and industrial automation.

Conclusion

Modular & Stackable U-Core assemblies using neodymium magnets represent a practical, high-performance solution for modern electromagnetic applications. By combining engineering expertise, standardized designs, and manufacturing discipline, Allstar Magnetics delivers magnetic assemblies that support innovation, efficiency, and long-term reliability.

Engineers In Action

Engineers In Action

Why Engineers Choose Allstar: Designing with Scale in Mind

By Grant Ahn, Director, Engineering and Integration Lead
When I get asked, “Why do companies choose Allstar over anyone else?” my answer is simple: it’s because we think ahead.
 
A lot of development houses are great at designing new products. They’ll create small runs—maybe one to three prototypes—and sometimes they even build them in-house. The problem is, those prototypes are rarely designed with manufacturability in mind. What works in a one-off build often becomes difficult, costly, or even impossible to scale when it’s time for full production.

That’s where Allstar comes in.

Designing with Scale in Mind

When companies pull us into the process early—at the prototype stage—we can help ensure that the design choices being made won’t become roadblocks later. We bring both technical application expertise and real-world manufacturing knowledge to the table. That combination is what sets us apart.

Instead of only thinking about function, we also ask:

  • How easy will this be to manufacture at scale?
  • Will the chosen materials hold up in production without blowing up the budget?
  • Can we simplify the design to improve reliability and reduce cost?

These are questions every engineer needs to consider before moving past the prototype phase.

Partnering Early Pays Off

By working with Allstar at the beginning, your prototype isn’t just proof of concept—it’s a foundation for production. That means when you’re ready to move from small runs to full-scale manufacturing, your design is already optimized to be built efficiently, cost-effectively, and at volume.

Customers choose Allstar for our technical and manufacturing expertise—and stay because we operate like an extension of their development team, anticipating what it takes to turn innovation into reality, seamlessly and without surprises.

If you’re an engineer working on your next big design, don’t wait until the production phase to think about manufacturability. Bring in a partner who can help you scale smart from day one.

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ENGINEERS IN ACTION

ENGINEERS IN ACTION

Redesigning for Success: How Allstar Helped an AI Robotic Company Solve a Magnet Challenge

Allstar Helped an AI Robotic Company Solve a Magnet ChallengeWhen an AI robotic company came to Allstar Magnetics, they had a clear request: replicate a magnet they already had. But once our engineers reviewed the design, it became clear that the geometry they provided wasn’t manufacturable—and even if it were, it wouldn’t work the way they needed.
 
Instead of simply duplicating a flawed design, our team sat down with the customer to better understand the real requirements. Through this partnership, we uncovered both a sourcing issue and a manufacturing issue that were preventing them from getting the solution they needed.
 
By asking the right questions and leveraging our years of expertise, Allstar was able to:
 

  • Redesign the magnet for true manufacturability
  • Solve an additional performance problem the original design wouldn’t have addressed
  • Deliver samples quickly for fast testing and feedback
  • Provide pricing that was more favorable than their original path

The result was not just a working magnet—but a better solution that met deadlines, reduced costs, and performed reliably.
 
This project illustrates what makes Allstar different: we don’t just build what’s handed to us. We partner with customers, ensuring that what they’re asking for is truly what they need—and often deliver something even better.
 
If your design isn’t working or manufacturability is an issue, Allstar can help you find the right path forward. Let’s talk about how we can turn your challenge into a smarter solution.

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Engineers In Action

Engineers In Action

What happens when a surgical device fails—and how engineering brings it back to life

A leading medical device company developed a surgical tool designed for use in operating rooms. During real-world procedures, however, the device revealed a critical issue: it would intermittently fail mid-surgery. While surgeons discovered a workaround to re-engage the tool and finish the operation, it was far from ideal.

Determined to resolve the problem, the device’s lead engineer went into the operating room to observe surgeons in action. By studying how and when the failure occurred—and why the workaround was effective—the root cause was identified: the power stage had been mis-designed and required a complete redesign.

What happens when a surgical device fails—and how engineering brings it back to life 

From Prototype to Production: How Allstar Helped

The manufacturer turned to Allstar Magnetics, their magnetic solutions provider. Our team stepped in during the early development phase to help troubleshoot, prototype, and refine the redesign. Beyond solving the technical problem, we collaborated with the client to ensure the solution could be efficiently scaled into production.

By combining engineering expertise with practical manufacturing foresight, Allstar helped move the redesigned device from concept to reality—restoring reliability in the OR and protecting patient outcomes. 

Advice from Our Engineers

Many of our medical device partners bring us in early in the design process, not just after problems arise, to fully benefit from our end-to-end engineering and manufacturing expertise. That’s because Allstar looks ahead—evaluating materials, manufacturability, and cost efficiency while prototypes are still being developed.

The payoff?

  • Time savings by identifying potential design and production challenges upfront.
  • Cost efficiency by aligning prototypes with scalable manufacturing processes.
  • Peace of mind knowing a collaborative partner is invested in both design success and long-term production quality.

As one client told us: “We come to Allstar for the expertise, but we stay for the partnership.”

Ready to troubleshoot an issue or launch your next device? Contact Allstar Magnetics today to discuss how we can support your project at every stage—from prototype to production.

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Engineers In Action

Engineers In Action

Smarter Solutions in Action: Custom Tooling for Adhesive Curing

At Allstar Magnetics, we know that every project brings unique challenges. Recently, a customer came to us with a requirement: cure adhesive on specialized magnets and large assemblies at a specific temperature and amount of time. Normally, this would call for a massive industrial oven—an expensive and space-consuming solution.
 
Instead of passing that cost along, our team designed and built a custom oven in-house. By combining electrical and mechanical expertise, we created a flexible system that not only handled this project but can be adapted for future needs. We collaborated with the customer on the initial design of the unit, and now Allstar is refining it further—adding a control box to regulate and modify heat for even more precision.
 
Custom Tooling for Adhesive Curing
 
The result? A solution that was faster, more cost-effective, and tailored to the customer’s needs. Just as important, this innovation adds long-term value: we now have a scalable capability to support similar projects going forward.
 
This project is a great example of how Allstar goes beyond being just a supplier—we’re a partner who listens, innovates, and finds better ways to solve problems.
 
Have a challenging project on your desk? Let’s start a conversation about how Allstar can help you achieve a smarter, more cost-effective solution.

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IRON CHROME COBALT (FECRCO) – A CASE STUDY

IRON CHROME COBALT (FECRCO) – A CASE STUDY

IRON CHROME COBALT (FECRCO):

Explore the Tone-Shaping Potential of FeCrCo for
Guitar Pickups

Iron Chrome Cobalt (FeCrCo) is a cobalt-chromium-based magnetic alloy originally developed as a replacement for CuNiFe. It is now gaining popularity in the audio and guitar industries as a high-performance alternative to AlNiCo—delivering vintage tone with modern manufacturability.

Key Properties

Property
Value Benefit
Value B
High Remanence (Br)
Warm tonal output, comparable to AlNiCo pickups
Low Coercivity (Hc)
Easily magnetized and shaped for precision field control
High Temp Resistance
Stable performance across a wide range of temperatures
Low Temp Coefficient
Predictable behavior under changing conditions
Corrosion Resistance
No coating required—ideal for long-term durability
Manufacturing Advantages:
  • Ductile and Formable: Can be rolled, stamped, and bent before heat treatment
  • Machinable: Easier to process than traditional AlNiCo or rare earth alloys
  • Thin Strip Capability: Can be formed into very thin strips for compact designs
  • No Post-Coating Required: Simplifies production and reduces cost
Available Forms:
  • Isotropic: Multi-directional magnetization
  • Anisotropic: Enhanced directional magnetic performance
Recommended Applications
  • Magnetic pole pieces and slugs for guitar pickups
  • Magnetic cores for custom audio transducers
  • Prototype pickup designs requiring material flexibility and tonal warmth
Why Choose FeCrCo?
FeCrCo offers the tonal character of classic materials with the manufacturability modern pickup designers need. It bridges the gap between vintage warmth and production flexibility—making it an excellent choice for builders and engineers in the audio space.
Typical Magnetic Performance Range for Cast FeCrCo

FeCrCo12/4 (referred to as FeCrCo1) and FeCrCo44/4 (referred to as FeCrCo5) are the two most commonly used Iron Chromium Cobalt materials. The other materials are available but may have a larger min order quantity.

Contact Us
Looking for a material that delivers vintage tone with modern manufacturability? Contact Allstar Magnetics—your trusted partner for FeCrCo prototyping and full-scale production, specializing in magnetic solutions for audio and guitar applications..