Mini Neodymium Disc Magnets D1-D20mm N35 N42 N52 Custom NdFeB
Brand: magnet forever
Product origin: china
Delivery time: 35 days
Supply capacity: 100000 pieces/month
Small diameters from D1mm to D20mm are available for compact assemblies where installation space is limited.
Different NdFeB grades can be selected according to product size, working distance and required magnetic performance.
Diameter, thickness, coating, tolerance and magnetization can be produced according to customer drawings.
Widely used in sensors, switches, motors, electronic components, miniature mechanisms and precision positioning products.
Production parameters can be retained for repeat projects to improve batch consistency and simplify future purchasing.
Product Specifcations
Higher grade is not always the first thing we recommend.
For small magnets, final magnetic performance depends on several factors together:
Diameter
Thickness
Grade
Working distance
Magnetic circuit
Mating material
Air gap
For example, changing a magnet from N35 to N52 while keeping an unsuitable air gap may not solve the actual application problem.
If the product has a defined sensing distance, holding force or switching distance, we prefer to review these requirements before confirming the grade.
| Material | Sintered NdFeb | |
Grade & Workingtemperature | Grade | Max.Operating Temperature |
| N35-N48 | 80°C(176°F) | |
| N50-N52 | 60° C(160°F) | |
| 35M-50M | 100° C(212° F) | |
| 33H-48H | 120° C(248°F) | |
| 33SH-45SH | 150°C(302°F) | |
| 30UH-40UH | 180°C(356°F) | |
| 28EH-38EH | 200° C(392° F) | |
| 28AH-33AH | 220° C(428° F) | |
| Shape | Disc | |
| Coating | Ni,Ni-Cu-Ni,Zn,Ag.Expoxy,Passivated,etx | |
| Customize | OEM | |
Choosing the Right Magnet Grade
N35
N35 is commonly selected for cost-sensitive projects where standard magnetic performance is sufficient.
It is often used in general electronic accessories, packaging products, household products and simple magnetic positioning structures.
N42
N42 provides higher magnetic performance than N35 while remaining a common choice for many OEM applications.
It is suitable when installation space is limited but stronger magnetic output is required.
N52
N52 is generally considered when maximum magnetic performance is required within a restricted magnet volume.
However, it should still be selected according to actual assembly conditions rather than grade alone.
Surface Coating Options：
Ni-Cu-Ni
The most common finish for standard NdFeB magnets.
Surface appearance is bright and suitable for many general applications.
Zinc
An alternative surface treatment for specific projects.
Epoxy
Often considered when additional environmental protection is required.
Gold / Silver
Available for selected applications or appearance requirements.
Magnetic Performance Verification
For raw NdFeB magnetic material, BH curve data can be provided when required.
For finished small magnets, Gauss measurement can be used as part of production inspection.
However, finished surface Gauss should not be used alone to determine magnet grade.
The result changes with:
Shape
Thickness
Measurement point
Sensor distance
Test equipment
Custom Development
Many miniature magnet projects cannot be selected directly from a standard catalog.
Customers often send us a finished-product drawing rather than a magnet drawing.
In this case, we can review the magnet installation position and discuss:
Suitable diameter
Thickness
Grade
Magnetization
Coating
Tolerance
This is particularly useful for sensors, electronics and small mechanisms.
About Us
Xiamen Magnet Forever Electronic Co., Ltd. has been working in permanent magnets and magnetic assemblies for more than 17 years.
Our factory covers approximately 5,000 square meters and operates 12 production lines.
We manufacture:
Neodymium magnets
Ferrite magnets
Pot magnets
Magnetic assemblies
Custom magnetic components
Our products are supplied to customers in more than 50 countries and regions.
Main export markets include North America and Europe. Based on our current export structure, approximately 40% of business is from North America and 30% from Eastern Europe.
Certifications
For export projects, we can provide related product and compliance documents according to the order requirement.
Available documents include:
SGS REACH report
REACH declaration
Product specification
Material information
Dimensional inspection records
Magnetic inspection data
BH curve data when required
Packing And Shipping
FAQ
Can you produce magnets smaller than D5mm?
Yes.
Miniature magnets such as D1mm, D2mm, D3mm and D4mm can be evaluated according to thickness, tolerance and order quantity.
Which grade should I choose, N35, N42 or N52?
It depends on available space, magnetic requirement, working distance and cost target.
Send us the application information and we can evaluate the suitable grade.
Can you produce according to my drawing?
Yes.
Custom diameter, thickness, tolerance, coating and magnetization are available.
What is the MOQ?
MOQ varies by dimension and process.
Very small customized magnets may require a production quantity suitable for machining and coating.
Please provide the required size and target quantity for evaluation.
Do you support OEM?
Yes.
Most customized projects are produced according to customer drawings, samples or technical requirements.
Can you add my logo?
Custom logo can be applied to labels and packaging.
Direct marking on very small magnets needs to be evaluated according to available surface area and coating.
