Diametric Neodymium Disc Magnets: Precision Power for Modern Applications
When strength, precision, and directional field control come together, few components match the versatility of a Diametric Neodymium Disc Magnet. This specialized magnet design offers unique performance characteristics for rotational sensing, coupling systems, and advanced motor technologies.
In this article, we explore how diametrically magnetized discs differ from axial ones, their key applications, and why Magfine.ca is your trusted source for neodymium magnets and industrial magnets across Canada.
What Is a Diametric Neodymium Disc Magnet?
A diametric neodymium disc magnet is a flat, circular magnet in which the magnetic field runs across the diameter — from one curved side to the opposite side. This is unlike the more common axial magnetization, where the field runs through the thickness of the disc (top to bottom).
Diametric vs Axial Magnetization: What’s the Difference?
The magnetization direction is the defining factor that influences a magnet’s behavior in a system:
| Feature | Axial Disc Magnet | Diametric Disc Magnet |
|---|---|---|
| Pole Location | Flat faces (top and bottom) | Curved sides (left and right) |
| Field Direction | Through the thickness | Across the diameter |
| Common Applications | Mounting, magnetic holding | Rotary sensing, magnetic coupling |
If your project involves circular motion or needs a consistent lateral field, a diametric disc is likely your best option. For axial gripping or holding, axial magnetization is more appropriate.
Applications of Diametric Neodymium Disc Magnets
Because of their unique field orientation, diametric disc magnets are the go-to choice in several advanced applications:
1. Rotary Sensors
Devices that detect rotation angle or speed rely on diametric fields to trigger sensors at precise points. These magnets are ideal for applications like rotary encoders or Hall-effect sensor systems.
2. Magnetic Coupling
In systems where torque must be transmitted without direct mechanical contact — like in fluid pumps or sealed gear assemblies — diametric magnets maintain consistent rotational force across a gap.
3. Miniature Motors
Brushless DC motors and micro motors benefit from diametrically magnetized discs, especially when a rotating magnetic field is essential for smooth operation and control.
4. Educational and Experimental Tools
Diametric magnets demonstrate fascinating field lines, making them popular in classroom settings and research for illustrating electromagnetic theory in motion-sensitive designs.
Explore our neodymium magnet catalog to see which sizes and magnetizations are currently available in Canada.
Why Use Neodymium?
Neodymium is the preferred material for modern industrial magnets due to its unmatched magnetic strength. Even in small sizes, it can produce powerful fields, making it perfect for space-constrained designs.
Magfine.ca ensures each neodymium magnet is manufactured to tight tolerances and coated to prevent corrosion and degradation over time. This guarantees durability in both indoor and outdoor industrial environments.
Selecting the Right Diametric Disc Magnet
Before making a purchase, keep the following in mind:
- Grade: Higher grades like N48 or N52 provide greater strength for the same size.
- Dimensions: Match outer diameter and thickness with your mechanical constraints.
- Coating: Nickel is standard, but epoxy or Parylene are available for more corrosive environments.
- Temperature: High-temp grades are available for demanding environments like automotive or aerospace.
Need help choosing the right configuration? Reach out via our Contact page for technical advice or to request a custom quote.
Magfine.ca: Reliable Supplier of Magnets in Canada
As a global magnet manufacturer with North American operations, Magfine brings precision Japanese engineering to local industries. Our neodymium magnets are used by companies across Canada in automotive, medical, industrial automation, and renewable energy sectors.
Benefits of choosing Magfine.ca for your industrial magnet needs:
- Large in-stock inventory
- Custom design and fabrication support
- Fast domestic shipping across Canada
- Friendly and knowledgeable customer service
Explore our full range of diametric diametric disc magnets today and see why Canadian manufacturers trust us to power their innovations.
Frequently Asked Questions
What is a diametric disc magnet?
It's a disc-shaped neodymium magnet with north and south poles located on opposite curved sides, rather than on the flat faces. This produces a lateral or rotational magnetic field.
How does a diametric magnet differ from an axial one?
An axial magnet has poles on the flat top and bottom surfaces, while a diametric magnet has them on the sides — ideal for circular motion sensing and coupling.
Are diametric disc magnets available in custom sizes?
Yes. Magfine.ca provides custom neodymium magnet fabrication services, including diametric disc magnets tailored to your specs.
Do you ship to all provinces in Canada?
Absolutely. We ship magnets across Canada, from Vancouver to Halifax and everywhere in between.
