Custom N42 Magnets Manufacturer in China
N42 Magnets are among the most widely used grades of rare earth magnets, offering an excellent balance between magnetic strength, cost efficiency, and versatility. Manufactured from premium Neodymium-Iron-Boron (NdFeB) material, N42 magnets provide strong magnetic performance for a wide range of industrial, commercial, and engineering applications.
At Osenc Magnets, we manufacture and supply custom N42 neodymium magnets in various shapes, sizes, coatings, and magnetization directions. Whether you need prototype quantities or large-volume production, our engineering team can provide tailored magnetic solutions for your project.
What Is an N42 Magnet?
N42 magnet is a sintered neodymium magnet grade with a maximum energy product of approximately 42 MGOe. It offers stronger magnetic performance than N35, N38, and N40 grades while remaining more economical than ultra-high grades such as N52 or N55.
Because of its balance between strength and cost, N42 has become one of the most popular magnet grades used worldwide.
N42 Magnet Specifications
| Property | Value |
|---|---|
| Magnet Grade | N42 |
| Material | NdFeB (Neodymium Iron Boron) |
| Maximum Energy Product (BHmax) | 40-43 MGOe |
| Remanence (Br) | 1.30-1.34 T |
| Coercivity (Hcb) | ≥ 923 kA/m |
| Intrinsic Coercivity (Hcj) | ≥ 955 kA/m |
| Density | 7.4-7.6 g/cm³ |
| Curie Temperature | 310-340°C |
| Max Working Temperature | 80°C |
| Manufacturing Process | Sintered |
Values may vary slightly depending on production batch and application requirements.
Available N42 Magnet Shapes
As a custom neodymium magnet manufacturer, we can produce N42 magnets in virtually any shape.
N42 Disc Magnets
Disc magnets are commonly used in:
- Sensors
- Consumer electronics
- Medical devices
- Promotional products
- Magnetic closures
Popular dimensions:
- D10 x 2 mm
- D20 x 5 mm
- D25 x 10 mm
- Custom sizes
N42 Ring Magnets
Ring magnets are widely used in:
- Brushless motors
- Loudspeakers
- Magnetic couplings
- Generators
- Rotary encoders
Available with:
- Axial magnetization
- Diametric magnetization
- Multipole magnetization
N42 Block Magnets
Block magnets provide maximum magnetic force and are often selected for:
- Industrial machinery
- Magnetic separators
- Holding systems
- Automation equipment
Typical sizes include:
- 20 x 10 x 5 mm
- 50 x 25 x 10 mm
- 100 x 50 x 25 mm
Custom dimensions are available.
N42 Arc & Segment Magnets
Arc magnets are specifically designed for:
- Servo motors
- Electric motors
- Wind generators
- Magnetic rotor assemblies
Features include:
- Precise arc angles
- Tight dimensional tolerances
- Multipole magnetization options
N42 Countersunk Magnets
Countersunk magnets are ideal for mounting applications where screws are required.
Applications:
- Furniture
- Signage
- Industrial fixtures
- Retail displays
N42 Magnet Coating Options
Neodymium magnets require protective coatings because NdFeB material is susceptible to corrosion.
We offer multiple coating solutions:
Nickel (Ni-Cu-Ni)
The most popular coating option.
Benefits:
- Bright metallic appearance
- Good corrosion resistance
- Cost-effective
Zinc (Zn)
Advantages:
- Lower cost
- Basic corrosion protection
- Suitable for indoor use
Epoxy Coating
Advantages:
- Enhanced corrosion resistance
- Suitable for humid environments
- Black appearance
Gold Coating
Benefits:
- Decorative finish
- Enhanced protection
- Premium appearance
Custom Coatings
Available options include:
- PTFE
- Parylene
- Chemical coating
- Rubber coating
- Plastic overmolding
N42 Magnet Applications
N42 magnets are used across many industries due to their strong magnetic performance and competitive pricing.
Electric Motors
N42 magnets are commonly integrated into:
- Brushless DC motors
- Servo motors
- Stepper motors
- Industrial drive systems
Their high magnetic energy density improves efficiency while reducing motor size.
Industrial Automation
Applications include:
- Robotic systems
- Linear actuators
- Pick-and-place equipment
- Automated production lines
Renewable Energy
N42 magnets play a vital role in:
- Wind turbine generators
- Permanent magnet generators
- Energy conversion systems
Electronics Industry
Used in:
- Speakers
- Sensors
- Magnetic switches
- Consumer electronics
Medical Equipment
Applications include:
- Diagnostic devices
- Magnetic assemblies
- Precision instruments
Custom coatings are available for specialized environments.
Magnetic Separation Systems
N42 magnets are widely used in:
- Magnetic filters
- Separator bars
- Conveyor separators
- Food processing equipment
Strong magnetic fields help remove ferrous contamination effectively.
N42 vs N35 Magnet
| Property | N35 | N42 |
|---|---|---|
| Magnetic Strength | Lower | Higher |
| Energy Product | 35 MGOe | 42 MGOe |
| Cost | Lower | Moderate |
| Industrial Usage | General | Extensive |
| Motor Applications | Good | Better |
N42 offers significantly stronger magnetic performance while remaining cost-effective.
N42 vs N52 Magnet
| Property | N42 | N52 |
|---|---|---|
| Strength | High | Very High |
| Cost | Lower | Higher |
| Availability | Excellent | Good |
| Industrial Projects | Widely Used | Specialized |
For many industrial applications, N42 provides sufficient magnetic force without the additional cost associated with N52 magnets.
Custom N42 Magnets Available
We specialize in custom-manufactured N42 magnets.
Customization options include:
Custom Shapes
- Disc
- Ring
- Block
- Arc
- Segment
- Tube
- Countersunk
- Cone
- Trapezoid
- Hexagon
- Irregular shapes
Custom Magnetization
- Axial
- Diametric
- Radial
- Multipole
- Custom magnetic orientation
Custom Tolerances
Standard tolerance:
±0.05 mm
Precision machining options available for demanding applications.
Quality Control
Every N42 magnet undergoes strict quality inspection procedures.
Our testing capabilities include:
- Magnetic flux testing
- Gauss measurement
- Pull force testing
- Coating thickness inspection
- Salt spray testing
- Dimension verification
- Magnetization inspection
This ensures consistent performance and reliability.
Why Choose Us as N42 Magnet Supplier
Experienced Manufacturer
Years of expertise in custom neodymium magnet production.
OEM & ODM Support
Engineering support for custom projects.
Flexible MOQ
Suitable for prototypes and mass production.
Fast Global Delivery
Export experience serving customers worldwide.
Competitive Pricing
Direct manufacturer pricing without intermediaries.
Frequently Asked Questions
Standard N42 magnets can operate continuously up to 80°C (176°F). For higher temperatures, N42M, N42H, N42SH, N42UH, and N42EH grades are available.
Yes. N42 magnets offer higher magnetic energy and stronger pull force compared to N40 magnets of the same size.
Yes. We manufacture custom dimensions, shapes, coatings, and magnetization patterns according to customer drawings or specifications.
Industries include:
- Automotive
- Renewable energy
- Industrial automation
- Electronics
- Medical devices
- Aerospace
- Magnetic separation
Nickel coating is the most common choice. For humid or corrosive environments, epoxy coating is generally recommended.
Request a Quote
Osenc Magnets provides high-quality custom N42 NdFeB magnets with competitive factory pricing, fast production lead times, and worldwide shipping. Contact our engineering team today to discuss your project requirements and receive a free quotation within 24 hours.