Durable ultra-powerful commercial grade countersunk hole customizable ndfeb magnets

Understanding Neodymium Magnets

Our maximum force durable ultra-powerful commercial grade countersunk hole customizable ndfeb magnets are engineered from high-grade NdFeB (Neodymium-Iron-Boron) for maximum magnetic strength and performance. Designed with precision countersunk mounting holes for easy screw installation, these magnets offer secure attachment to wood, metal, and other surfaces, making them perfect for woodworking, construction, industrial machinery, and home DIY applications. Featuring a triple-layer Ni-Cu-Ni coating and optional plastic protection, they deliver exceptional durability and corrosion resistance, even in demanding environments. Available in a wide range of sizes, shapes, and grades (N25–N56) with temperature resistance up to 250°C, these magnets can be tailored to meet specific project requirements, including custom magnetic pole marking. Whether used in manufacturing, medical devices, robotics, automotive, or home improvement, our countersunk neodymium magnets ensure reliable, long-lasting holding power. Backed by over 15 years of expertise and a stable supply partnership with the China National Rare Earth Group, they offer the perfect blend of strength, precision, and durability for any application.

Countersunk Hole Neodymium Disc Magnet

Durable ultra-powerful commercial grade long lasting countersunk hole customizable ndfeb magnets are easy to install and provide a strong magnetic hold, making them suitable for a wide range of applications. In industrial environments, they’re often used to secure safety covers, fix metal plates in place, or hold components steady during use. Around the house, they work well for magnetic latches, organizing garage tools, or keeping heavy doors closed. In retail, they’re commonly used to mount signs and displays where strength and flexibility are important. Their durable design and wide range of uses make them a practical solution for many everyday tasks.

Magnet Grade: N42

These high temp durable ultra-powerful commercial grade long lasting countersunk hole customizable ndfeb magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 42 MGOe. Well-suited for various applications including motors, sensors, and precision assemblies, they deliver consistent magnetic performance. Their reliable field strength makes them a preferred choice for consumer electronics and technical equipment alike. Widely adopted across industries, N42 magnets are valued for their dependable and efficient performance.

APPLICATION EXAMPLES

Material Neodymium (NdFeB)

Product Name: Countersunk hole customizable magnets
Magnetic Grade: N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe)
Thickness: D 8mm x 3mm

Countersunk Hole: 3mm
Dimensional Tolerance: Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm

Magnetisation Direction: Axially Magnetised

Polarity: Countersunk Face North
Operating Temperature: ≤80°C (high-temp version available)
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)

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