Neodymium Ring Magnets

As a leading NdFeB magnet manufacturer in China, MAG SPRING supplies a wide range of high-performance Neodymium Ring Magnets (also known as donut magnets or circular magnets). These ring-shaped magnets are specially designed for applications requiring a central aperture for mounting on shafts, dowels, or cylindrical components. We offer both bulk supply and fully customized services to meet diverse industrial and consumer product requirements.

Product Overview

Our Neodymium Ring Magnets are high-performance sintered NdFeB permanent magnets with a hollow cylindrical structure. They provide strong magnetic force in a compact ring shape, ideal for assembly, mounting, and integration into various devices. With customizable sizes, coatings, and magnetization directions, our ring magnets deliver reliable performance for electronics, automotive, motors, sensors, and consumer products.

Technical Specifications

• Product Type: Neodymium Ring Magnets (NdFeB Donut / Circular Magnets)
• Material: Sintered Neodymium-Iron-Boron (NdFeB)
• Size Range: Outer diameter & inner diameter from 0.5mm up to 250mm
• Coatings: NiCuNi, White Zinc, Color Zinc, Gold, Epoxy, Teflon, and custom coatings
• Magnetization: Standard axial magnetization; customized direction available upon request
• Tolerance: Precision machining for tight dimensional tolerance
• Compliance: RoHS compliant materials

Available Shapes & Sizes

We provide standard and custom dimensions for Neodymium Ring Magnets to match your design requirements:

• Outer Diameter: 0.5mm – 250mm
• Inner Diameter: Custom based on assembly needs
• Height / Thickness: Customizable for different magnetic performance
• Custom Sizes: Non-standard dimensions available based on drawings or samples

Coating & Surface Options

Multiple protective coatings are available to improve corrosion resistance and service life:

• NiCuNi (Nickel-Copper-Nickel): Standard industrial coating with excellent corrosion resistance
• Zinc: Cost-effective protection for general applications
• Epoxy: Chemical-resistant for harsh environments
• Gold / Silver: For conductivity, appearance, or special applications
• Teflon: Low-friction, anti-corrosion surface

Applications

Neodymium Ring Magnets are widely used in many industries and products:

• Consumer electronics: iPhone, iPad, iPod, headphones, and smart devices
• Automotive tools, sensors, and automotive electronic components
• Micro-motors, servo motors, and magnetic assemblies
• Speakers, audio equipment, and measuring instruments
• Household appliances, cameras, and optical equipment
• Toys, crafts, gifts, and daily-use magnetic products

Advantages

• High magnetic strength with stable performance in ring structure
• Central hole design for easy shaft mounting and assembly
• Wide size range from miniature to large diameter rings
• Multiple coating options for different environments
• Low MOQ (1 piece) for prototype and small-batch testing
• Fast lead time and reliable bulk production capacity
• Fully customizable to match drawings and technical requirements

Production and Delivery

• Production Lead Time: 7–30 days based on order quantity and specifications
• Minimum Order Quantity (MOQ): 1 piece for prototype and testing
• Packaging: Neutral hard carton; export packaging for air or sea shipment
• Custom Packaging: Branded or protective packaging available upon request
• Logistics: Safe and efficient global delivery

Manufacturing Process

Our Neodymium Ring Magnets are produced under strict standardized processes:

• Raw material selection → Smelting → Powder processing
• Forming → Sintering → Performance testing
• Machining & precision grinding → Coating
• Magnetizing → Final inspection → Secure packing

Quality and Compliance

Every batch of Neodymium Ring Magnets undergoes strict quality control:

• Full magnetic performance testing (demagnetization curve check)
• Dimensional inspection for precision assembly
• Coating adhesion and corrosion resistance testing
• ISO9001 quality management system certified process
• All products meet EU RoHS environmental requirements

Certifications & Compliance

• ISO9001 Quality Management System certified
• ISO14001 Environmental Management System certified
• EU RoHS compliant materials
• Environmentally friendly and safe for industrial and consumer use

Customization Service

We provide full customization for Neodymium Ring Magnets based on your needs:

• Custom outer diameter, inner diameter, and height
• Custom magnetic grade and magnetization direction
• Custom surface coating and color
• Technical support for design and application optimization

FAQs

Q: What is the size range of your Neodymium Ring Magnets?
A: We produce ring magnets from 0.5mm up to 250mm in outer diameter, with fully customizable inner diameters.

Q: What coatings are available for ring magnets?
A: Standard coatings include NiCuNi, Zinc, Epoxy, Gold, Teflon, and other custom surface treatments.

Q: What magnetization direction do you provide?
A: Axial magnetization is standard; customized magnetization directions are available based on your design.

Q: What is the MOQ and lead time?
A: MOQ is 1 piece for prototypes. Lead time is 7–30 days depending on quantity and specifications.

About Us

As a leading Neodymium Ring Magnets manufacturer in China, Mag-spring was established in 2003 and is located in Ningbo, Zhejiang Province. We are a comprehensive manufacturer of magnetic application products, specializing in the research, design and production of magnetic filters and various magnetic components.

The company has professional technicians and modern production equipment, operating strictly under the ISO9001 quality system. We also hold ISO14001 environmental certification, and all products meet EU RoHS requirements.

Based on the enterprise tenet of "efficiency, perfection, harmony and dedication" and the slogan "everything we handle must be excellent", our magnetic products are recognized by customers worldwide. We look forward to cooperating with you with high-quality products, competitive prices and reliable service.

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