Neodymium Disc Magnets (NdFeB) — N35 to N56
Osenc supplies neodymium disc magnets for engineers, buyers, and builders who need dependable holding force in a compact round form.
Choose from N35–N56 grades, multiple coatings, and axial or diametric magnetization—with sampling support before volume.
- High-grade capability (up to N56) — solve high-force requirements when space is tight.
- Coating options in-house coordination — match corrosion/wear needs without supplier hopping.
- Tolerance control + repeatable batches — consistent fit across reorders and production runs.
- Samples first, then scale — validate performance quickly before committing to volume.
60-Second Selection Guide
Pick Your Grade
N35–N42 for general use. N52+ when space is tight and force matters. N56 for maximum magnetic energy in compact discs.
Choose Coating
Dry indoor: Nickel. Humid/splash: Epoxy/Plastic. Low friction: Teflon. Sensitive assemblies: Parylene. Decorative: Gold/Chrome.
Confirm Magnetization
Most disc magnets are axially magnetized; some assemblies require diametric magnetization for side-pole fields.
Pros & Cons
- Very high strength-to-size ratio for compact assemblies.
- Multiple coatings fit dry, humid, wear, or low-friction environments.
- Wide grade range up to N56 for demanding holding needs.
- Axial or diametric magnetization supports different field-direction designs.
- Tight tolerance options improve fit consistency in repeat builds.
- Corrosion risk if coating is damaged or used in wet environments.
- Can chip or pinch fingers; requires careful handling and spacing.
Neodymium Disc Magnets Sizes (D×T), Grades, Coating
Use the table to shortlist models by diameter, thickness, grade, coating, magnetization, tolerance, and estimated pull force. For pricing, choose either Samples or Bulk Quote—same product, two ordering paths.
| Product | Neodymium Disc Magnet (NdFeB / Rare Earth) |
| Shape | Disc (Diameter > Thickness) |
| Size Identification | Diameter × Thickness (e.g., D9 × 3 mm) |
| Available Grades | N35–N56 (high-temperature options available on request) |
| Magnetization Direction | Axial (common), Diametric/Radial (common); other directions available on request |
| Coating Options | Nickel, Zinc, Teflon, Gold, Chrome, Plastic, Epoxy, Parylene |
| Surface / Features | Smooth surface; high magnetic strength; compact size; large magnetic working area |
| MOQ | 1 piece |
| Lead Time | 7 days for regular shapes (fastest); 20 days for custom designs |
| Ordering Paths | Small Order (Sample/Pack) or Bulk Quote (same product, two ordering paths) |
| Typical Applications | Electric motors, speakers, sensors; consumer and industrial products; scientific and medical product design/manufacturing |
| Custom Capability | Custom sizes and thicknesses supported; coating and design options available to fit application requirements |
*Pull force values are reference estimates under ideal test conditions (clean, flat steel, direct contact, straight pull). Real holding depends on steel type, surface condition, air gaps, coatings, and alignment.
Pull Force Explained (Why Real Holding Can Be Lower)
Pull force is a useful comparison number—but it’s not a promise in every assembly. The same magnet can behave very differently depending on the magnetic circuit and mounting surface.
What reduces holding in real use:
Air gaps (paint, tape, coatings, uneven surfaces).
Rough or thin steel, small contact area, misalignment.
Side loads/shear loads vs straight pull.
Rust, debris, and repeated impacts.
Practical rule: For critical holds, design with a safety factor and test the magnet in your actual setup.
Magnetization Direction: Axial vs Diametric
- Axial magnetization: poles on the flat faces (most common for disc magnets).
- Diametric magnetization: poles on the curved sides (useful for rotating fields, sensing, special fixtures).
When to choose diametric:
Sensors, rotating assemblies, or when you need the strongest field across the diameter rather than thickness.
Related: Magnets & Magnetism
Coating Options (Choose by Corrosion, Wear & Surface Needs)
Osenc offers multiple coatings so your disc magnets match real environments—not just lab conditions.
Coating Matrix
- Nickel (NiCuNi) — general indoor use, clean finish.
- Zinc — economical corrosion protection for mild environments.
- Epoxy — improved corrosion resistance; good for humid exposure.
- Plastic — extra barrier protection; helpful for moisture & handling.
- Parylene — thin, uniform coating for precision assemblies and sensitive contact.
- Teflon — low friction / anti-stick surfaces for sliding contact.
- Gold — decorative finish; also used where appearance matters.
- Chrome — hard, wear-resistant surface appearance.
Up next: sizes & tolerances—because fit matters as much as force in many builds.”
Sizes & Tolerances (Standard vs Tight Options)
Disc magnets are typically specified by diameter × thickness. Standard tolerance works for most holding and closure uses. For alignment, sensing, or assemblies with press fits, tighter tolerances reduce rework and improve consistency.
What to send for accurate quoting:
- Size (D×T) and unit (mm or inch)
- Grade (N35–N56)
- Coating requirement
- Tolerance requirement (Std / Tight)
- Quantity (sample / pilot / mass production)
Operating Temperature (Confirm Before Final Grade)
Most standard NdFeB disc magnets are suited for typical ambient conditions. If your assembly sees elevated heat, confirm operating temperature early—temperature affects magnetic performance and long-term stability.
Tip: Tell us your max operating temperature and duty cycle, and we’ll recommend a suitable material option.
Now let’s make selection easier with real-world use cases by industry.
Common Applications for Neodymium Disc Magnets
- Sensors & Reed Switches (position sensing, proximity triggers, robotics).
- Motors & Generators (compact magnetic circuits, prototypes).
- Audio & Electronics (speakers, headphones, fixtures).
- Closures & Latches (packaging, furniture, enclosures).
- Jigs, Fixtures & Workholding (alignment, temporary holding).
- DIY & Crafts (fasteners, mounts, displays).
With adhesive
The adhesive magnet has double-sided tape on its back. You can stick those magnets to a variety of surfaces. And there can be different types of double-sided tapes, which are designed for various applications.
Next: why Osenc—quality checks, traceability, and how we reduce procurement risk.
Why Osenc (Quality, Consistency, and Support)
Written by Ben (Osenc) — focused on selection guidance for neodymium disc magnets used in industrial and commercial builds.
- Selection support: grade/coating/magnetization guidance based on your setup.
- Batch consistency focus: dimensional checks + coating inspection for stable supply.
- Sampling first: confirm fit and holding before volume production.
- Procurement-friendly: clear specs, fast responses, and repeatable reorders.
Specs are confirmed during quoting (size, grade, coating, magnetisation, tolerance). For critical loads, we recommend application testing and appropriate safety factors.
“Next: packaging & shipping—how we prevent chipping and unwanted attraction in transit.”
Packaging & Shipping Notes (Protecting Magnets in Transit)
Neodymium disc magnets can chip and attract unexpectedly if packed poorly. We package to reduce collision, protect coatings, and keep parts separated for safer handling.
What we can align on:
- Separation & cushioning for fragile discs
- Bulk packing for volume orders
- Labeling for easier receiving and inventory control
Still deciding? The FAQ answers the most common buyer questions—including N56 availability.
Yes. Osenc can supply disc magnets up to grade N56. Share your size (D×T), coating, and quantity for availability and lead time.
Epoxy or Plastic coatings are common choices for moisture exposure; Parylene is an option for thin, uniform protection in precision builds.
Axial poles are on the flat faces; diametric poles are on the sides. The best choice depends on your field direction needs.
Yes—send a drawing or target dimensions, grade, coating, tolerance, and quantity.
Pull force is a reference under ideal conditions; real holding depends on gaps, steel condition, load direction, and alignment.
FAQ — Neodymium Disc Magnets
Didn’t find what you were looking for? Contact us now and we’ll get back to you within an hour.
Get Samples or Request a Bulk Quote
- [email protected]
- 0086 139 2737 7121
- Changping, Dongguan, Guangdong 523000, China
- We will respond to you within five minutes.