Neodymium Micro Magnet Manufacturer & Supplier
Neodymium micro magnets are ultra-small rare earth magnets made from NdFeB (Neodymium Iron Boron) material. Despite their miniature size, these tiny magnets deliver exceptionally strong magnetic force, making them ideal for compact electronic devices, medical equipment, precision instruments, micro motors, sensors, and advanced industrial applications.
As a professional neodymium micro magnet manufacturer in China, we provide custom miniature magnets with high dimensional accuracy, stable magnetic performance, and various coating options for demanding OEM and industrial projects.
What Are Neodymium Micro Magnets?
Neodymium micro magnets are precision-manufactured miniature magnets typically ranging from less than 1 mm up to several millimeters in size. These magnets are engineered for applications where space is extremely limited but strong magnetic performance is still required.
Micro magnets are available in multiple shapes, including:
- Micro disc magnets
- Micro cylinder magnets
- Micro block magnets
- Micro ring magnets
- Ultra-thin micro magnets
- Custom miniature magnet shapes
Their compact size combined with high magnetic energy makes them widely used in modern miniaturized technologies.
To make scientific topics easier to understand, we divide the most miniature magnets into two dimensions:
• Small magnets (Little magnets): 1.00 – 2.00 mm (3/64 – 5/64 inch)
• Micro magnets (Tiny magnets): 0.20 – 0.99 mm (200μm-990μm,1/64 – 1/32 inch)
Key Features of Micro Magnets
Ultra Small Size
Designed for miniature assemblies and compact electronic products.
Strong Magnetic Force
Made from high-performance NdFeB material with excellent magnetic strength relative to size.
Precision Tolerances
Manufactured with tight dimensional tolerances for high-precision applications.
Multiple Coating Options
Available with NiCuNi, epoxy, gold, zinc, parylene, and custom protective coatings.
High Consistency
Reliable magnetic performance for mass production and automated assembly.
Custom Manufacturing
OEM sizes, magnetization directions, grades, and packaging solutions available.
Available Micro Magnet Shapes
Micro Disc Magnets
Micro disc magnets are widely used in sensors, electronic modules, miniature switches, small closures and positioning systems. They are usually axially magnetized through the thickness, but other magnetization directions may be available for custom designs.
Micro Cylinder Magnets
Tiny cylinder magnets are suitable for compact assemblies, reed switch activation, medical device components, micro motors and precision instruments. Their small diameter and strong magnetic field make them useful where accurate magnetic response is required.
Micro Block Magnets
Micro block magnets and cube magnets are often selected for space-limited electronic products, wearable devices, magnetic connectors and compact mechanical structures. They can be magnetized through thickness, length or width depending on the assembly method.
Micro Ring Magnets
Miniature ring magnets are commonly used in small sensors, micro motors, instruments and rotational systems. Inner diameter, outer diameter, thickness and magnetization direction can be customized.
Custom-Shaped Micro Magnets
For special product designs, we can manufacture custom micro NdFeB magnets based on your CAD drawing, sample or technical specification. Custom shapes help improve assembly efficiency and magnetic performance in complex structures.
Common Micro Magnet Specifications
| Parameter | Available Range |
|---|---|
| Material | NdFeB / Rare Earth Magnet |
| Size Range | From 0.2 mm and above |
| Magnet Grade | N35–N55, M, H, SH, UH |
| Coating | Ni-Cu-Ni, zinc, epoxy, gold, silver, parylene, passivation |
| Magnetization | Axial, diametrical, through thickness, through length, multi-pole |
| Tolerance | Common tolerance ±0.05 mm; tighter tolerance available upon evaluation |
| Operating Temperature | Up to 230°C depending on grade, coating and application environment |
Surface Coating Options
Because neodymium magnets are sensitive to corrosion, micro magnets usually require protective coating. We offer several coating options for different environments.
| Coating | Features |
|---|---|
| Ni-Cu-Ni | Common coating, good appearance, widely used |
| Zinc | Economical option for general applications |
| Epoxy | Improved corrosion resistance, black appearance |
| Gold | Decorative finish, suitable for selected electronics and jewelry applications |
| Silver | Conductive and decorative option |
| Parylene | Thin, uniform coating for precision applications |
| Passivation | Thin protective layer for selected designs |
For humid, outdoor or chemically exposed environments, please tell us your application conditions so we can recommend a suitable coating.
Minimum Dimensions Of Micro Neodymium Magnets
As a custom magnet supplier, we can produce micro magnets with the dimensions below.
• Minimum block: 0.2*0.2*0.2 mm
• Minimum disc: 0.2*0.2 mm
• Minimum tube: 0.38*0.14 *2 mm
• Tolerances: between +/- 0.005mm and +/- 0.020 mm
• Minimum hole diameter: 0.10 mm
The giant thin magnet we made is 50*50*0.2mm (This is a big challenge)
Micro Magnets Applications
Neodymium micro magnets are widely used in high-tech and precision industries like:
Consumer Electronics
Smartphones, earbuds and headphones, smart watches, miniature speakers, cameras.
Medical Devices
Hearing aids, surgical tools, drug delivery systems, diagnostic equipment.
Automotive Electronics
Sensors, electric actuators, micro motors, control systems
Industrial Equipment
Precision instruments, robotics, automation systems, measuring devices.
Aerospace & Defense
Compact sensors, navigation systems, lightweight magnetic assemblies.
How to Select the Right Micro Magnet
Choosing the correct micro magnet is important because even a small change in size, coating or magnetization can affect the final performance.
When requesting a quote, please provide the following information:
Shape and dimensions
For example: diameter × thickness, length × width × height, or full drawing.Magnetic grade
If you are not sure, tell us your required magnetic force or application environment.Magnetization direction
Axial, diametrical, thickness, length or custom multi-pole magnetization.Coating requirement
Nickel is commonly used, while epoxy, parylene or gold may be selected for specific environments.Working temperature
Standard NdFeB magnets are suitable for many room-temperature applications, while high-temperature grades may be required for motors or industrial devices.Assembly method
Gluing, press-fitting, overmolding, magnetic coupling or mechanical fixing.Order quantity
Prototype quantity, trial order quantity and estimated annual demand.
Custom Micro Magnet Solutions
We provide fully customized micro magnet manufacturing services according to customer requirements.
Custom Options Include
- Custom dimensions
- Special magnet grades
- Ultra-thin designs
- Precision machining
- Special coatings
- Multi-pole magnetization
- Tight tolerance control
- Bulk OEM production
Our engineering team can assist with material selection, magnetic performance optimization, and manufacturability improvements.
Manufacturing Challenges of Micro Magnets
Producing micro neodymium magnets requires advanced manufacturing capabilities due to their extremely small dimensions.
Key challenges include:
- Precision grinding and cutting
- Fragility during machining
- Tight tolerance control
- Coating uniformity
- Magnetization accuracy
- Handling and packaging of tiny components
With advanced production equipment and strict quality control systems, we ensure consistent quality for miniature magnet production.
Costs For Micro Neodymium Magnets
Individuals wonder why micromagnets are more costly than regular magnets. Miniature magnets use significantly less substance than ordinary magnets.
Is it the producer who earns a lot of money? Here are three reasons why tiny neodymium magnets are more expensive.
Hard To Process
Nano magnets are more difficult to manufacture because they are too tiny to manage correctly. They will necessitate specific fittings and extra care. The most difficult tasks are cutting and finishing. It may take longer to modify and fine-tune machinery. In some severe instances, we require 7 hours of physical labor to create the first certified micromagnet.
The majority of the processes necessitate the physical processing of the magnets, resulting in decreased output. This also increases manufacturing expenses.
High Wastage
During manufacturing, micromagnets have a significantly greater failure rate. Sometimes, we must make 800 – 2,000 parts to get 50 approved magnets. Their basic materials are costly N52, N54, or N55.
Most faulty magnets occur when employees start-up and fine-tune the equipment. Miniature neodymium magnets are insufficiently tiny and fragile. The magnets will be faulty or even harmed even if the working power is marginally more significant.
Special Instruments
Micro magnets cannot be manufactured in the same factories as ordinary magnets. Their forbearance will be more than adequate. As a result, we’ll need to employ some specialized equipment. We also have a Quadratic element measure to ensure that the measurements are correct and that the product meets the client’s needs.
Excellent Skilled Workers
Many of the processes for making tiny magnets are done by hand. Although automatic machines have made great strides, they can still not make some precision bespoke magnets. People employees are still more adaptable to the demands of actual work.
Osenc has been steadily increasing our capacity to produce a wider variety of micron magnets, and we can now handle 0.2 mm magnets.
We always provide high-quality, long-term-stability goods. We have made significant progress in this area.
Our goods, particularly our deep-hole thin magnetic bands, find widespread application in timepieces, timers, micro-motors, meters, optical transmission, and other areas.
We can also create a new style based on the customer’s sketch and specifications. Many clients are pleased with our superior methods in magnetic tubes, magnetic cylinders, columnar magnets, magnetic conduit, hole magnets, magnetic pipelines, pipe magnets, tube magnets, Cylinder magnets, deep hole magnets, and other applications.
Why Choose Us as Micro Magnet Supplier?
Industry Experience
Extensive experience in custom rare earth magnet manufacturing.
Precision Manufacturing
Advanced equipment for ultra-small magnet production.
Strict Quality Control
Comprehensive inspection processes for dimensions and magnetic performance.
Fast Global Delivery
Worldwide shipping with secure export packaging.
Engineering Support
Professional technical assistance for custom projects.
Frequently Asked Questions
We can produced micromagnets in sizes below 0.2 mm depending on your shape, tolerance, and application requirements.
For maximum strength at normal temperature, grades such as N48, N50 or N52 are often considered. For higher working temperatures, M, H, SH, UH or EH grades may be more suitable.
Nickel coating is commonly used for general applications. Epoxy, parylene, gold or other coatings may be selected for improved corrosion resistance, thinner coating requirements or special appearance needs.
Request a Quote for Custom Micro Magnets
Looking for a reliable supplier of neodymium micro magnets? Send us your drawing, dimensions, grade, coating, magnetization direction and quantity. Our team will help you select the right miniature magnet for your application.