Customized heat resistance permanent round nickel plated countersunk magnet

Customized heat resistant permanent round nickel plated countersunk magnet

     1. Product overview & Applicaion fields 

   Precision customized heat resistant energy efficient small round nickle plated countersunk magnetic ring  is made from rare earth neodymium-iron-boron (NdFeB) material. It features strong magnetic force and stable performance. The central countersunk hole design allows for secure mounting using flat-head screws, compatible with metal, wood, plastic, and other materials. It offers firm installation, shock resistance, and is suitable for environments requiring frequent operation.

 Customized  fast magnetic response heat resistant round nickle coating counterbore magnet offers high residual induction (Br), high intrinsic coercivity (Hcj), and excellent directionality. It is ideal for applications requiring strong magnetic adhesion and structural integration, including automation equipment, sensor systems, electro-mechanical assembly, positioning fixtures, and speaker mounting. It is a preferred magnetic component in engineering projects.

  Customized heat resistant permanent round nickel plated countersunk magnet are widely used in magnetic tool holders, concealed cabinet latches, speaker mounting systems, and sensor installations. With their exceptional magnetic strength, high stability, and convenient mounting structure, they not only enhance the functionality and aesthetics of end products but also provide users with a more efficient, safer, and modern usage experience.

  Specifically, for magnetic tool holders, the countersunk hole allows the magnet to be flush-mounted into panels, ensuring a concealed and visually clean finish. Additionally,  this thermally stable tailor-made permanent  round nickle plated magnet ensures secure installation of audio components, effectively preventing vibration and detachment. The countersunk design also enables firm fastening to metal brackets or wooden enclosures without compromising the acoustic design. Moreover, this low noise operation precision customized heat resistant permanent round nickle plated countersunk magnet ‘s structure ensures that magnets can be securely fixed to a variety of materials—such as in concealed cabinet latches—delivering a seamless, stable, and reusable magnetic solution for various devices.

 2. Techinical Specification

Product Name:  Customized heat resistant permanent round nickel plated countersunk magnet

Magnet Grade: N48 (Br ≥ 14.8 KGs, Hcj ≥ 10.5 KOe) — Customizable

Dimensions: D24-D21×4 mm

Tolerance: ±0.05 mm (Length, Width, Thickness)

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

Density: ≥7.5 g/cm³

Surface Magnetic Field: 2400 Gauss (Measured using Japan TM-801 Gauss meter)

Magnetic Flux: 2.2 mWb (Measured; value varies by material grade)

 3. Surface Treatment & Coating Technology

To enhance corrosion resistance, surface quality, and magnetic stability, this customized high adhesive force heat resistant permanent round nickle plated countersunk magnet 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

Coating Benefits:

Salt spray resistance and improved oxidation durability

Higher surface hardness and scratch resistance

Enhanced gloss, suitable for exposed parts

4. Apperance & Dimensional Inspection

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.

    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 Test

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.

Damp Heat Test: Evaluates resistance to high humidity and corrosion.

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 understand logistics is more than just transport — it's about your commitment and customer satisfaction. Our solutions offer:

Global logistics support

End-to-end visual tracking

Multiple layers of transport safety

One-on-one customer service for tailored shipping plans

With our reliable land, sea, and air logistics network, we empower your business to go further and soar higher.

7. FAQ

Q: How to choose the correct magnetization direction?

Axial Magnetization: Magnetic lines flow through thickness — best for concentrated fields

Radial Magnetization: Magnetic lines radiate outward — for uniform field distribution

Multipole Magnetization: Multiple poles along circumference — for complex fields (e.g., motors, sensors)

Q: What is the maximum working temperature of a ring magnet?

Standard N-series: up to 80°C

High-temp grades (SH/UH/EH): up to 150°C–230°C

Dysprosium-enriched formulations can further enhance temperature resistance

Q: Does magnetism decay over time?

Under normal conditions (room temp, dry, no heavy vibration), NdFeB magnets exhibit excellent time stability (<5% loss over 10 years). However, factors like:

Temperature overrun

Strong external magnetic fields

Surface corrosion

Mechanical impact may affect performance.

 8. Why choose us ?

    Dongguan Jinconn New Materials 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 over a decade of expertise in magnetic materials and precision magnet manufacturing, we understand the technical demands of a wide range of industries.

Our in-house engineering and tooling teams enable us to offer custom-shaped, high-precision, and application-specific magnets tailored to your unique requirements.

We adhere to international standards including ISO 9001, ISO 14001, and IATF 16949, with strict quality control from raw materials to finished products.

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.

 9. 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.

10. Customization & Service 
 

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