custom precision engineered high temperature resistant strong rare earth Neodymium single countersunk block magnet

1. Product Overview & Application Scenarios

Engineered with premium N45SH-grade neodymium, these custom industrial grade high torque output precision engineered high temperature resistant strong rare earth Neodymium single countersunk block magnets deliver superior magnetic performance coupled with exceptional thermal stability. Unlike traditional alnico magnets that gradually suffer from magnetic decay – a key factor in locomotive performance degradation – our advanced N45SH formulation offers significantly elevated coercivity, ensuring unparalleled resistance to demagnetization.

The high coercivity design guarantees permanent magnetic stability, making these custom high adhesive force precision engineered high temperature resistant energy efficient strong rare earth Neodymium single countersunk block magnets  ideal for heritage models where enduring performance is critical. Boasting a 6.27kg pull force and 150°C thermal tolerance, they excel in high-output motor applications while preserving the operational integrity of restored locomotives over decades.

Why Professionals Choose N45SH:

Eliminates aging-related flux loss that plagues conventional magnets

Maintains peak field strength even under continuous heavy loads

Future-proof solution for collectors prioritizing authentic, long-term performance

For restorers committed to preserving vintage engineering excellence, these magnets represent the definitive balance of cutting-edge materials science and historical fidelity.

Technical Specifications

- Product Name: custom precision engineered high temperature resistant strong rare earth Neodymium single countersunk block magnet

- Magnet Grade: N45SH (Br ≥13.3 kGs, Hcj ≥12.6 kOe)  

- Dimension: 12mm x 10mm x 13mm   

- Dimensional Tolerance: +/-0.05 

- Operating Temperature: ≤150°C (High-temp versions available)  

- Density: ≥7.5 g/cm³  

- Surface Magnetic Field: 3,800 Gs  

- Magnetic Flux : 2.0 mWb  (Fluxmeter-tested)  

Surface Treatment & Coating Technology

To enhance this custom precision engineered  fast response high temperature resistant strong magnetic force rare earth Neodymium single countersunk block 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

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.

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.

 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!

  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.

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.

Contact Us：

 Phone/WhatsApp/WeChat: +86 13829120676

 Email: Info@jinconn.com

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