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  • custom High-Performance permanent Neodymium Square countersunk Magnet
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  • custom High-Performance permanent Neodymium Square countersunk Magnet

    This elegant set of six metal square frames with central round apertures is ideal for resin coaster making, crafting projects, or stylish drink coaster holders. Crafted from corrosionresistant metal with a brushed gold finish, these lightweight yet durable frames support coaster discs, DIY resin pours, or display use. Compatible with felt or cork bumpers, they protect surfaces and add sophistication to your tablescape. Stackable and lasercut, each frame can be customized with engraved logos or decorative designs—perfect for makers, home décor enthusiasts, and gift giving.


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Description

This elegant set of six metal square frames with central round apertures is ideal for resin coaster making, crafting projects, or stylish drink coaster holders. Crafted from corrosionresistant metal with a brushed gold finish, these lightweight yet durable frames support coaster discs, DIY resin pours, or display use. Compatible with felt or cork bumpers, they protect surfaces and add sophistication to your tablescape. Stackable and lasercut, each frame can be customized with engraved logos or decorative designs—perfect for makers, home décor enthusiasts, and gift giving.



Custom High-Performance permanent Neodymium Square countersunk Magnet


  


1. Product Overview & Application Scenarios

 

This custom excellent thermal stability  high-Performance permanent Neodymium Square countersunk Magnet features through-holes and is constructed from high-performance neodymium iron boron (NdFeB) material with N52 grade magnetic strength. The triple-layer nickel-copper-nickel plating provides a durable, silver-white finish while ensuring corrosion resistance. With a maximum operational temperature limit of 80°C (176°F), these custom industrial use energy efficient strong magnetic force stable High-Performance permanent Neodymium Square countersunk Magnets  offer customizable dimensions - including width, thickness, and hole specifications - to meet your exact application requirements.



Key Industrial Applications:



  


2. Technical Specifications

- Product Name: custom High-Performance permanent Neodymium Square countersunk Magnet

- Magnet Grade: N52 (Br ≥14.2 kGs, Hcj ≥12 kOe)  

- Dimension: 20mm x 20mm x 3mm

- Dimensional Tolerance: +/-0.05 

- Operating Temperature: ≤80°C (High-temp versions available)  

- Density: ≥7.5 g/cm³  

- Surface Magnetic Field: 1,800 Gs  

- Magnetic Flux : 2.0 mWb  (Fluxmeter-tested)  

 

3. Surface Treatment & Coating Technology

To enhance this custom professional grade high torque energy efficient fast response  High-Performance permanent Neodymium Square countersunk Magnet’ s corrosion resistance, surface quality, and magnetic stability, the following treatments are used:


Edge Reinforcement: Laser cladding with nickel-based alloy at magnet seams (prevents electrochemical corrosion)

Edge Rounding: Reduces magnetic field distortion

Default Coating: Triple layer Ni-Cu-Ni (customizable)

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

Optional Coatings: Gold or silver plating for better conductivity and corrosion resistance



  



4. Appearance & Dimensional Inspection

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

 

Automated Intelligent Inspection: High-speed cameras with AI algorithms detect and reject defects (e.g., cracks, scratches, discoloration) and dimensional anomalies, improving yield and reducing human error.

 

Magnetic Flux Consistency Test: Fluxmeters or Hall-effect testers measure magnetic flux across batches to ensure uniform performance in end-user applications.


                                     

5. Reliability Testing

To ensure magnet maintain excellent corrosion resistance in complex or harsh environments, the salt spray test is an essential accelerated aging method. It simulates long-term exposure to marine climates, industrial pollution, humidity, or acidic and alkaline conditions, allowing for a reliable evaluation of the protective performance and durability of the magnet's surface coating.

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

                    

 

 

 

6. 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, and tracking codes.

 


We know logistics is more than moving goods — it’s about delivering your promise. Our trusted solutions offer:

Global shipping coverage

Real-time tracking from origin to destination

Enhanced safety at every stage

Dedicated service with customized shipping plans

With our robust land, sea, and air network, your business moves faster, safer, and with complete confidence.

 

7. 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.


20+ years of magnet manufacturing expertise

 

Strict quality control & customization capability

 

Multilingual technical support with global delivery

 

RoHS and REACH compliant

     

                             

 

 

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

    

 

8.  Usage Precautions

⚠ Safety & Handling Guidelines

Handle with care: Neodymium magnets are brittle and can chip or crack if dropped or impacted.

 

Avoid injury: Always slide magnets apart—do not force or pry them to separate.

 

Check polarity before use: Incorrect installation may cause malfunction or damage to equipment.

 

Store properly: Keep in a dry, neutral environment; avoid contact with moisture, acids, or corrosive substances.

 

Keep away from sensitive electronics: Do not place near hard drives, magnetic cards, pacemakers, or similar devices.

 

9. Customization & Services

Customizable magnet dimensions, geometry, and surface coatings (including layer count, thickness, and color)

 

Precision magnetization orientation and adjustable magnetic field intensity

 

Optional laser marking for logos, part numbers, or traceability codes

 

Specialized packaging and pull-force testing tailored to your application needs


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.


 Precision Magnetics, Tailored for Performance.


If you have any magnet-related needs, we offer free customized magnet services. Please feel free to contact us at any time.

Contact Us
 Phone/WhatsApp/WeChat: +86 13829120676
 Email: Info@jinconn.com
 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.



 





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