1. Product Introduction

Round sintered NdFeB magnets include flat discs, solid cylinders, ring magnets and countersunk discs. We have abundant standard sizes in stock and support precision drilling and countersunk machining. Featuring compact size and extremely strong magnetic force, they perfectly fit circular groove installation structures and are widely adopted as universal permanent magnet materials in the electronics and motor industries.

For detailed magnetic grade parameters, please refer to our NdFeB Magnet Performance Chart.

2. Product Classification

Flat Solid Disc Magnets

Thin round magnets for adhesive mounting, commonly used in wireless charging modules, speakers and magnetic door catches.

Solid Cylindrical Magnets

Embedded positioning magnets matched with sensors and micro cylinder equipment for precise assembly.

Through-hole Ring Magnets

Designed for shaft penetration assembly, widely used in encoders and small motor rotors.

Countersunk Disc Magnets

Screw-fixed round magnets for reliable positioning in molds and automated tooling fixtures.

Micro Mini Round Magnets

Ultra-small magnetic components specially applied in TWS earphones, smart wearable devices and miniature magnetic assemblies.

3. Magnetic Performance & Surface Coatings

Temperature Resistance Grades

N series (80℃), M series (100℃), H series (120℃), SH series (150℃), UH/EH series (180℃–220℃).

Surface Anti-corrosion Coatings

Ni-Cu-Ni plating (general industrial standard), black epoxy coating (moisture and corrosion resistance), zinc plating (cost-effective economical option).

4. Core Advantages

Abundant Stock & Fast Delivery

Mass standard round magnet sizes in stock for immediate shipment.

Smooth Round Structure

Edgeless round design perfectly adapts to circular mounting grooves without scratching equipment.

Diversified Installation Methods

Support adhesive bonding, shaft penetration and screw locking installation for different assembly scenarios.

Full-size Customization

Custom service available from micro miniature sizes to large-diameter round magnets.

Custom Magnetization Solutions

Radial magnetization and multi-pole magnetization can be customized to match various magnetic circuit designs.

5. Application Scope

Widely used in wireless charging devices, Bluetooth earphones, micro motors, Hall sensors, precision instruments, cabinet magnetic door catches, automated tooling, vehicle-mounted equipment and miniature medical devices.

6. Usage Precautions

NdFeB magnets are brittle. Avoid violent knocking and extrusion during assembly. Edge chamfering is recommended to prevent chipping.

Select high-temperature resistant grades for long-term high-temperature working conditions to avoid demagnetization.

Epoxy coating is preferred for humid and outdoor environments to enhance anti-rust and anti-corrosion performance.

7. Factory Direct Supply

We provide factory direct sales of standard round magnets with fast stock delivery. Non-standard customized ring magnets and countersunk round magnets support rapid prototyping. Our professional engineers provide free magnetic selection and assembly solutions. We support large-batch OEM customized production.