Flower-Slot NdFeB Ring Magnet with Center Bore

1. Product Overview

Precision Engineering · Structural Innovation

This four-lobed strong magnetic force stable neodymium ring magnet is engineered with a unique petal-shaped contour, surpassing conventional circular magnets in both form and function. The combination of a center bore and a multi-lobed outer profile provides enhanced mechanical locking, anti-rotation capability, and seamless integration in precision components like motors, encoders, and sensor hubs.

 Structural Advantages:

Anti-Rotation Locking: Lobed outer profile prevents rotational slip under high-speed conditions, improving mechanical reliability

Precision Fit: The symmetrical slot pattern ensures consistent assembly alignment, ideal for automated production

Multi-Surface Contact: Enhances bonding or mechanical coupling with shafts, sleeves, or positioning elements

 Performance Highlights:

Made from high-grade N52 neodymium, delivering ultra-strong magnetic force in compact form

Protected by triple-layer Ni-Cu-Ni coating for excellent corrosion and oxidation resistance

Thermal stability up to 200°C, making it suitable for demanding environments such as automotive and aerospace

Tight machining tolerance (±0.05mm) ensures a perfect fit for high-precision application.

2. Technical Specifications

Product Name: Flower-Slot NdFeB Ring Magnet with Center Bore

Magnet Grade: N45 (Br ≥ 14.8 KGs, Hcj ≥ 10.5 KOe) — Customizable

Dimensions: Y10x8x5mm

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. Appearance & 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. 

4. Reliability Testing

Impact & Vibration Test: Simulates shipping and usage conditions to ensure operational stability.

5. Packaging & Transportation

Quality Control: Every magnet undergoes 100% inspection using calipers, projectors, and automated systems to ensure no defects like cracks, chips, oxidation, or coating issues.

Optimal Magnetization & Packaging: Magnets are evenly magnetized and arranged for efficient packaging and easy automation, tailored to your needs for top performance.

Advanced Packaging: Our multi-layer vacuum packaging, with moisture barriers and desiccants, protects against corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shockproof, moisture-resistant, and anti-magnetic leakage packaging meets international standards, complete with product lists, labels, and tracking codes for easy handling.

At the heart of logistics is more than just movement — it's about delivering on your promises and ensuring customer satisfaction. Our comprehensive solutions provide:

Global logistics coverage to keep you connected everywhere.

Real-time visual tracking for complete transparency at every stage.

Multi-layered security for safe, reliable transport.

Personalized customer service with customized shipping plans tailored to your needs.

With our trusted land, sea, and air network, we help your business reach new heights and expand globally, every step of the way.

6.  FAQ

❓ Q1: What industries can this shaped neodymium magnet be used in?

✅ Answer：
This magnet is widely used in motors, sensors, automation assemblies, smart locks, consumer electronics, and medical devices requiring precise alignment and strong magnetic force.

❓ Q2: What are the advantages of this flower-shaped magnet compared to regular ring magnets?

✅ Answer：

The multi-lobed or flower shape offers better anti-rotation and anti-slip properties, ensuring secure mechanical locking and precision mounting—ideal for high-speed rotor systems and precise assemblies.

❓ Q3: Can you customize the size, grade, or coating of the magnet?

✅ Answer：
Yes, we offer full customization on dimensions, bore position, magnetic grades (N35–N52), and coatings (Ni-Cu-Ni, epoxy, zinc, etc.)

7.Application Scenarios

High-End Motors & Drive Systems

Application Scenarios: Brushless DC motors (BLDC), stepper motors, servo motors, precision rotor systems
Structural Contribution: The lobed outer profile prevents magnet displacement or slippage during high-speed rotor rotation
Key Benefits:

More stable torque output, reducing vibration and noise

Improved assembly accuracy, significantly lowering alignment errors

High-temperature resistant materials support up to 200°C operation, ideal for EVs, power tools, etc.

Consumer Electronics Components

Application Scenarios: Wireless earbud cases, laptop hinge assemblies, magnetic mounting elements
Structural Contribution: Unique shape supports concealed structural integration and reliable magnetic attachment
Key Benefits:

Compact size with strong holding force, satisfying industrial aesthetic demands

Balanced magnetic field with no leakage, avoiding interference with precision electronics

Custom coating options (epoxy, black zinc, etc.) provide both visual appeal and protection

Smart Locks & Mechanical Positioning Systems

Application Scenarios: Fingerprint locks, electro-lock magnetic positioning, anti-drop latch modules
Structural Contribution: Four-lobed design offers multi-point contact for stable alignment, center bore allows screw/pin fixing
Key Benefits:

Enhanced structural stability, prevents loosening and shifting

Simplifies assembly, improves installation efficiency

Magnetic closure enhances tactile feel and security

8. Why Choose us ？

At JinConn, we are committed to delivering high-performance magnetic products and customized services that help our clients gain a competitive edge. Here’s why industry leaders choose us:

✅ Rich Industry Experience

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

✅ Strong R&D and Customization Capabilities

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

✅ Certified Quality Assurance

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

✅ Technical Support & Responsive Service

From product selection and prototyping to mass production, our expert team provides fast, reliable technical support to keep your projects on track.

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 & Services

·  Customized Magnet Sizes, Shapes, and Coatings: We offer fully tailored magnet dimensions, shapes, and coating options, including multiple layers, varying thicknesses, and color choices.

·  Personalized Magnetization & Strength: Magnetization direction and field strength can be adjusted to meet your specific application requirements.

·  Laser Engraving: We provide laser engraving services for logos, serial numbers, or other custom markings.

·  Specialized Testing: We conduct packaging and suction force testing to ensure performance in unique or demanding applications.

Contact us to receive free samples and customized magnet solutions

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