Jinconn’s tiny rectangular-shaped N45SH neodymium magnets offer exceptional magnetic strength, high coercivity, and excellent thermal stability. With a corrosion-resistant triple-layer Ni-Cu-Ni coating and precise dimensional tolerance, these professional-grade magnets are ideal for electric motors, sensors, aerospace components, and precision assemblies. Available in custom sizes, magnetization directions, and coatings to match your exact needs.
Neodymium (NdFeB) magnets are known for their exceptional magnetic strength, making them the strongest type of permanent magnet on the market. Their compact size enables them to deliver a high magnetic force, even in space-constrained applications. In construction, they help securely position metal components during assembly, while in the medical sector, they play a vital role in the consistent performance of imaging systems and sensitive equipment. From everyday home tasks to demanding industrial operations, these magnets ensure dependable, long-lasting functionality.
These precision customized industrial grade strong magnetic force high coercivity Strong Tiny rectangular shaped professional Rare Earth Neodymium Magnets are highly versatile and perfect for both DIY tasks and industrial uses. Whether organizing tools, fastening panels, or creating custom assemblies, their strong magnetic grip ensures stable, reliable performance. These industrial grade high torque output high coercivity Strong Tiny rectangular shaped professional Rare Earth Neodymium Magnets are frequently used in engineering, aerospace, and construction for precise alignment and firm-holding power. Ideal for both casual and professional users, these magnets offer a flexible solution across a wide range of applications.
N45SH grade neodymium magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 42-46 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, N45SH magnets are valued for their dependable and efficient performance.
Product Name: industrial grade high coercivity Strong Tiny rectangular shaped professional Rare Earth Neodymium Magnet
Magnetic Grade: N45SH (Br ≥ 13.8 kGs, Hcj ≥ 20 kOe)
Dimensions: L3mm x 3mm x 3mm (customizable)
Dimensional Tolerance: Length ±0.03mm, Width ±0.03mm, Thickness ±0.03mm
Operating Temperature: ≤90°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)
This industrial grade high coercivity Strong magnetic force efficient motor drive Tiny rectangular shaped professional Rare Earth Neodymium Magnet 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
To enhance corrosion resistance and appearance:
Default Plating: Triple-layer Ni-Cu-Ni (customizable).
Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).
Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.
✔ Salt spray & oxidation resistance
✔ Increased surface hardness (scratch-resistant)
✔ Improved gloss (ideal for exposed components)
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.
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.
Q: How to choose the correct magnetization direction?
Axial Magnetization: Magnetic lines flow through the thickness — best for concentrated fields
Radial Magnetization: Magnetic lines radiate outward for a uniform field distribution
Multipole Magnetization: Multiple poles along circumference — for complex fields (e.g., motors, sensors)
Q: What is the maximum working temperature of a ring 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
Q: Does magnetism decay over time?
Under normal conditions (room temp, dry, no heavy vibration), NdFeB magnets exhibit excellent time stability (<5% loss over 10 years). However, factors like:
● Temperature overrun
● Strong external magnetic fields
● Surface corrosion
● Mechanical impact may affect performance.
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 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.
● 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.
● 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
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