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  • precision customized industrial grade corrosion resistant high torque powerful donut-shaped ring magnet

    Explore premium N52 neodymium ring magnets with exceptional magnetic strength, corrosion resistance, and high torque capabilities. Ideal for motors, electronics, DIY projects, and industrial applications. Custom sizes and coatings available.


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Description

Explore premium N52 neodymium ring magnets with exceptional magnetic strength, corrosion resistance, and high torque capabilities. Ideal for motors, electronics, DIY projects, and industrial applications. Custom sizes and coatings available.



precision customized industrial grade corrosion resistant high torque powerful donut-shaped ring magnet



  




Unlock Exceptional Strength with Our N52 Neodymium Counterbore Magnets


Our precision customized industrial grade premium quality high adhesive force corrosion resistant high torque powerful donut-shaped ring magnet (featuring a 5mm central hole) offer exceptional magnetic strength and versatile functionality. Engineered for easy installation across various surfaces, they are ideal for DIY projects, crafting, woodworking, furniture assembly, industrial uses, and advanced scientific applications.

With a powerful N52 grade rating, these precision customized industrial grade strong magentic force fast response corrosion resistant high torque powerful donut-shaped ring magnets deliver superior holding force, making them the perfect solution for tasks that demand maximum strength and precision.

 

65mm x 20mm x (5mm hole) Nickel - Plating permanent high - strength neodymium disc magnets


These precision customized industrial grade high remanence corrosion resistant high torque multipole magnetized powerful donut-shaped ring magnets are ideal for crafting magnetic storage systems, keeping tools neatly arranged, or holding objects securely in place at home. Thanks to their small yet strong design, they’re widely used in manufacturing, engineering, and product development. In construction, they play a key role in aligning and fastening materials during projects. Versatile and reliable, these magnets serve both everyday and industrial applications across various industries.


Magnet Grade: N52


N42 grade neodymium magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 51 MGOe. Well-suited for various applications including motors, sensors, and precision assemblies, they deliver consistent magnetic performance. Their reliable field strength makes them a preferred choice for consumer electronics and technical equipment alike. Widely adopted across industries, N52 magnets are valued for their dependable and efficient performance.

 


 

APPLICATION EXAMPLES

            


Technical Parameters


Product Name: precision customized industrial grade corrosion resistant high torque powerful donut-shaped ring magnet


Magnetic Grade: N52 (Br ≥ 14.6 kGs, Hcj ≥ 12 kOe)


Dimensions: D - 65mm x 20mm (5mm Hole)


Dimensional Tolerance: Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm


Operating Temperature: ≤80°C (high-temp version available)


Density: ≥7.5 g/cm³


Surface Magnetic Field: 2450 ±200 Gauss (measured with TM-801 Gauss meter)


Magnetic Flux: 2.3 mWb (measured with fluxmeter)


 

Manufacturing Process


The product is manufactured through the following key processes:

 A high-speed grinding wheel shapes the magnet's surfaces with tight dimensional tolerances.


● Coolant fluid is applied to control heat, reduce surface stress, and ensure a smooth finish.


● The result is a uniform, precisely dimensioned magnet with clean edges—ideal for high-performance applications.

This precision step is essential for ensuring that the final magnets meet strict quality standards for use in motors, sensors, electronics, and aerospace components      

 



Surface Treatment & Plating


To enhance corrosion resistance and appearance:

Default Plating: Triple-layer Ni-Cu-Ni (customizable).

Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).

Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.

 


Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation


  


Image Measurement System: High-res cameras and algorithms conduct non-contact 2D measurements, especially for complex or irregular shapes, ensuring efficiency and objectivity in mass production.


Reliability Testing

Impact & Vibration Test: Simulates shipping and usage conditions to ensure operational stability.

Constant Temperature & Humidity Test: Performed under 85°C and 85% RH for 96–500 hours. Performance and appearance are compared before and after testing.

  


Applications

Electric Motors & Generators
Application: Precision-engineered magnets are employed in stators, rotors, and brushless DC motors to enhance magnetic flux density, efficiency, and torque performance.

Consumer Electronics
Application: High-performance neodymium magnets are integrated into speakers, haptic systems, vibration motors, and sensors, contributing to compact design and reliable functionality
.

  


Packaging & Transportation

Defect Elimination: 100% inspection using calipers, projectors, visual checks, and automated systems to reject cracked, chipped, oxidized, or coated-defective magnets.

Uniform Magnetization & Structured Arrangement: Magnets are uniformly magnetized and arranged for optimal packaging based on customer requirements to ensure performance and facilitate automated assembly.

Vacuum Sealed Packaging: Multi-layer vacuum sealing with moisture barriers, desiccants or nitrogen, prevents corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shock-proof, moisture-resistant, and anti-magnetic leakage packaging (e.g., multilayer cartons, plastic boxes, metal shielding) ensures compliance with international logistics standards. Each box includes a product list, labels.


  

Why Choose us

Dongguan Jinconn New Material Holdings  Co., Ltd. is a publicly listed enterprise offering integrated R&D, manufacturing, and sales of rare earth magnets. Based in Xiaohe Industrial Zone, Daojiao Town, Dongguan, we serve clients across China and globally.



With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

Usage Precautions?

● Handle gently: Avoid impacts/drops (brittle material).

● Prevent pinching: Slide magnets apart—do not pry.

● Polarity check: Install correctly to avoid malfunctions.

● Avoid moisture/acids: Store in dry, mild environments.

● Keep away from sensitive devices: Hard drives, IC cards, pacemakers, etc.

Customization & Services

 Custom magnet size, shape, and coating (layers, thickness, color)

● Tailored magnetization direction and field strength

● Laser engraving service for logos or serial numbers

● Packaging and suction force testing for special applications


Please contact us for free samples, magnet customization solutions, and MSDSRoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001 or other relevant certificates!

We’re here to help!

Phone/WhatsApp/WeChat: +86 180 3822 5893

Email: info@jinconn.com


Website: www.jinconnmagnet.com


 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong, China


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