Product Overview
This diametrically magnetized cylindrical magnet features a compact design with strong magnetic force and excellent dimensional stability. Its high energy density and corrosion-resistant nickel coating ensure reliable performance in demanding environments. Ideal for rotor motor applications, it delivers precise magnetic flux, enhances torque output, and improves overall motor efficiency. The uniform shape allows for balanced rotation, reduced vibration, and superior dynamic performance-making it an optimal choice for high-speed, precision-engineered motor assemblies.
Technical Specifications
- Product Name: diametrically magnetized cylindrical magnets
- Magnet Grade: N35 (Br ≥11.8 kGs, Hcj ≥12 kOe)
- Dimensional Tolerance: +/-0.05
- Operating Temperature: ≤80°C (High-temp versions available)
- Density: ≥7.5 g/cm³
- Surface Magnetic Field: 3,500 Gs
- Magnetic Flux : 2.0 mWb (Fluxmeter-tested)
More About N35 Grade
N35 is a standard grade of neodymium iron boron (NdFeB) permanent magnet, known for its balanced magnetic performance and cost efficiency. It offers moderate magnetic strength and stable properties, making it suitable for a wide range of general-purpose applications. N35 magnets are commonly used in motors, magnetic assemblies, sensors, and consumer products. With a typical maximum operating temperature of about 80 °C, N35 is ideal for applications where extreme magnetic force is not required but reliable and economical performance is essential.
Neodymium magnet Knowledge
Rare Earth Neodymium-Iron-Boron Permanent Magnet, M Grade
Core Performance Characteristics
Residual Induction (Br): approx. 1.1–1.3 T
Provides stable and reliable magnetic flux density for consistent performance.
Intrinsic Coercivity (Hcj): typically ≥ 14–16 kOe
Offers enhanced resistance to demagnetization compared with standard N grades, supporting use in moderately elevated temperature environments.
Maximum Operating Temperature: up to ~100 °C
Delivers improved thermal stability, making it suitable for applications with mild heat exposure.
Manufacturing Process
Magnetic Field Alignment and Pressing
The fine powder is compacted into green compacts using either axial or isostatic pressing under a strong magnetic field. This magnetic alignment orients the crystal grains in a preferred direction, significantly enhancing the magnet's anisotropic properties and energy density.
Vacuum Sintering
The pressed compacts are sintered in a high-temperature vacuum furnace. During sintering, particles bond metallurgically, and the magnet reaches near-full density. This step determines the final magnetic performance and structural strength of the magnet.
Heat Treatment (Aging)
After sintering, the magnets undergo precise heat treatment to stabilize the microstructure, optimize coercivity, and improve resistance to demagnetization, especially for high-temperature applications
Why Choose Us
Dongguan Jinconn New Material Holdings Co., Ltd. is a publicly listed company specializing in the full spectrum of rare-earth magnet development-from research and engineering to large-scale production and global sales. Headquartered in the Xiaohe Industrial Zone of Daojiao Town, Dongguan, we proudly supply customers throughout China and around the world.
▼ Over Two Decades of Professional Magnet Manufacturing
More than 20 years of industry experience ensure mature processes, stable performance, and reliable solutions.
▼ Rigorous Quality Assurance & Tailored Engineering
We maintain strict quality control at every stage and offer flexible customization to meet diverse application requirements.
▼ Global Service with Multilingual Technical Support
Our engineering and sales teams provide seamless communication and worldwide shipping to support international customers.
▼ Fully Compliant with RoHS and REACH Standards
All products meet global environmental and safety regulations, ensuring safe and compliant use in a wide range of industries.
Safety, Packaging & Delivery Control
Standardized safety and packaging controls are applied to reduce risks during delivery and application.
Handling & Risk Considerations:
- Rapid attraction may occur when magnets approach each other
- Mechanical shock may cause fracture
- Storage and application temperature should be controlled
- Demagnetization risks should be considered during design
Packaging & Delivery:
- Grouped and isolated packing based on magnetic strength
- Internal cushioning to prevent attraction and collision
- Clear magnetic product identification on cartons
- Shielded or standard packaging selected based on shipping method
FAQ
Q1 How does magnet coating affect reliability and lifetime?
NdFeB magnets are highly susceptible to corrosion. Coating selection depends on environment and application:
Ni-Cu-Ni: Good general-purpose protection, decorative finish.
Epoxy: Superior corrosion resistance, suitable for humid or marine environments.
Zn: Economical, moderate protection.
Parylene: Thin, uniform coating for precision or medical applications.
Improper coating choice can lead to oxidation, strength loss, or mechanical failure.
Q2 Can NdFeB magnets be customized for specific magnetic field distributions?
Yes. Magnetic performance can be tailored through:
Grade selection
Geometry optimization
Magnetization pattern (axial, diametrical, multi-pole, radial)
Assembly design (magnet arrays, Halbach arrays)
Finite Element Analysis (FEA) is commonly used to simulate and optimize field distribution.
Q3 What tolerances are achievable for NdFeB magnets?
Typical dimensional tolerances:
Sintered NdFeB: ±0.05 mm to ±0.1 mm (depending on size and shape)
Precision grinding: Tighter tolerances possible but increase cost
Magnetic property tolerances (Br, Hcj) are defined by industry standards but may vary between production lots.
Contact Us：
Phone/WhatsApp/WeChat: +86 13829120676
Email: Info@jinconn.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.
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