About Us

Who We Are

Nanjing Huajin Magnet Co., Ltd. is a professional neodymium magnet manufacturer, specializing in high-performance NdFeB (sintered neodymium magnets) for global industrial applications.

With years of experience in the magnetic materials industry, we provide reliable solutions for sectors such as electronics, automotive, and industrial equipment, serving customers worldwide.

Advanced Manufacturing & Quality Assurance

Equipped with automated production lines, we ensure high-precision and high-volume manufacturing of NdFeB magnets and magnetic assemblies.

Our ISO-certified quality control system covers the entire process—from raw materials to final inspection—ensuring stable quality, tight tolerance, and consistent magnetic performance for demanding applications.

Customization & Global Service

We provide comprehensive OEM & ODM neodymium magnet solutions, including custom sizes, grades (N25–N52), coatings, and magnetization.

Supported by an experienced team, we deliver fast response, technical support, and reliable global supply, helping clients achieve efficient and scalable project execution.

Neodymium Magnet Production Process

The production of sintered NdFeB (neodymium magnets) involves precise and controlled processes to ensure high magnetic performance, tight tolerance, and stable quality for industrial applications.

Raw Material Preparation: High-purity Nd, Fe, and B materials are selected to ensure consistent magnetic properties.
Pressing: Powder is compacted under a magnetic field to align domains and form the initial shape.
Sintering: High-temperature sintering creates a dense structure with strong magnetic performance.
Cutting & Slicing: Blocks are processed into discs, blocks, rings, or custom sizes.
Grinding & Machining: Precision machining ensures tight tolerance and smooth surface finish.
Coating: Surface treatments such as NiCuNi, Epoxy, Zinc, or Gold improve corrosion resistance.
Magnetization: Magnets are magnetized axially or diametrically based on application needs.
Inspection: Full quality checks cover magnetic strength, dimensions, and coating quality.
Packaging: Products are packed with magnetic shielding for safe global shipping.

Frequently Asked Questions About Neodymium Magnets

What is the strongest type of neodymium magnet you offer?

We supply high-performance NdFeB magnets from N25 to N52 grades, with N52 providing the highest magnetic strength. Custom grades and high-temperature options are also available.

Can you provide custom neodymium magnets based on drawings?

Yes, we offer full OEM & ODM services, including custom size, shape (disc, block, ring), coating, and magnetization based on your drawings or application requirements.

What is your minimum order quantity (MOQ)?

MOQ depends on size and specifications. For standard sizes, we support flexible MOQ, while custom products are optimized for bulk production.

What is the typical lead time for orders?

Standard products: 3–7 days Custom orders: 7–20 days depending on complexity and quantity

What coatings do you offer for corrosion resistance?

We provide NiCuNi (Nickel), Epoxy, Zinc, and Gold coatings, ensuring durability and corrosion resistance for different environments.

How do you ensure consistent quality?

We follow a strict ISO quality control system, including raw material inspection, in-process control, and final testing for magnetic performance and tolerance.

Can magnets be customized for high-temperature applications?

Yes, we offer high-temperature resistant grades (e.g., N35SH, N42UH) suitable for motors, automotive, and industrial environments.

Do you support global shipping and export?

Yes, we export to 100+ countries, providing reliable logistics solutions and magnetic shielding packaging for safe international delivery.

Can you help optimize magnet design for my application?

Our engineering team provides technical support, magnetic circuit design, and cost optimization, helping improve performance and reduce material cost.

How are magnets packaged for shipment?

Magnets are packed with anti-magnetic shielding, foam protection, and export cartons to ensure safety during air and sea transportation.