High temperature resistant compact commercial use permanent rectangular epoxy coated countersunk custom magnet

Understanding Neodymium Magnets

Boost your projects with our high temperature supper strength resistant compact commercial use permanent rectangular epoxy coated countersunk custom magnets (10mm x 8mm x 3mm), designed for precision and reliable performance in mid-sized applications such as electric motors, generators, sensors, and rotating assemblies. Crafted from premium rare earth materials, these magnets are the strongest type of permanent magnet available, delivering exceptional pulling power even in compact spaces. The curved arc shape ensures an even distribution of magnetic force, improving efficiency, reducing energy loss, and enhancing overall design performance. Their durable, corrosion-resistant coating makes them ideal for demanding industrial environments, while their versatility allows use in sectors ranging from manufacturing and robotics to medical imaging systems and sensitive instruments. Whether positioning components securely during assembly, driving consistent performance in advanced machinery, or powering everyday DIY projects, these high temperature resistant supper heat strength resistant compact commercial use permanent neodymium rectangular epoxy coated countersunk custom magnets provide dependable, long-lasting functionality to meet the needs of professionals and innovators alike.

10mm x 8mm x 3mm epoxy -plated countersunk custom magnet

These high temperature resistant supper heat strength resistant compact commercial use permanent rectangular epoxy coated countersunk custom magnets are designed for industrial applications, especially in making energy-efficient electric motors and generators. Their curved shape allows them to fit smoothly around the rotor, helping to create a strong and steady magnetic field. This improves motor performance and helps save energy. Commonly used in industries like automotive, robotics, and clean energy, these magnets support systems that need high torque and efficiency. They also play a key role in industrial machinery and automation, helping equipment run reliably and last longer, an important benefit for modern manufacturing.

Magnet Grade: N52

N52 neodymium magnets offer some of the strongest magnetic power available, with an energy rating of up to 49-53 MGOe. As one of the highest grades, they are ideal for projects that need extra-strong magnetism. Their powerful performance makes them a reliable choice for demanding applications where maximum strength is essential.

APPLICATION EXAMPLES

Material Neodymium (NdFeB)

Product Name: Rectangular epoxy coated countersunk custom magnet
Magnetic Grade: N52 (Br ≥ 14.6 kGs, Hcj ≥ 12 kOe)
Dimensions: 10mm x 8mm x 3mm
Dimensional Tolerance: Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm
Operating Temperature: ≤80°C (high-temp version available)

Pull (kg): 1.31KG

Magnetisation Direction: Radially Magnetised
Density: ≥7.5 g/cm³
Surface Magnetic Field: 3800 ±200 Gauss (measured with TM-801 Gauss meter)
Magnetic Flux: 2.3 mWb (measured with fluxmeter)

Manufacturing Process

The product is manufactured through the following key processes:

● A high-speed grinding wheel shapes the magnet's surfaces with tight dimensional tolerances.

● Coolant fluid is applied to control heat, reduce surface stress, and ensure a smooth finish.

● The result is a uniform, precisely dimensioned magnet with clean edges—ideal for high-performance applications.

This precision step is essential for ensuring that the final magnets meet strict quality standards for use in motors, sensors, electronics, and aerospace components.

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.

  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.

 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.

 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 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

  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.

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.

  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.

  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