1/2" x 3/8" N45 Epoxy-Coated Neodymium Disc Magnets – Strong Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N45 |
| Shape |
Disc |
| Diameter |
1/2" (12.7 mm) |
| Thickness |
3/8" (0.375" / 9.53 mm) |
| Pull Force |
Approximately 19 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel-Epoxy Quadruple Layer |
| Magnetization |
Through Thickness |
| Br Max |
13,800 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 19 lbs of pull force under ideal conditions. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is N45 stronger than N42 magnets? |
Yes. N45 provides greater magnetic strength than N42, N40, N38, and N35 magnets of the same size. |
| Can it be used outdoors? |
Yes. The epoxy outer coating provides enhanced corrosion resistance, making it better suited for humid and outdoor environments. |
| What is it commonly used for? |
Industrial fixtures, woodworking, magnetic assemblies, marine applications, robotics, engineering projects, and DIY builds. |
Product Overview
These 1/2" x 3/8" N45 Epoxy-Coated Neodymium Disc Magnets are engineered to deliver powerful magnetic performance in a compact, heavy-duty design. The 1/2-inch diameter provides excellent contact area, while the 3/8-inch thickness generates a deeper magnetic field and greater holding power than thinner disc magnets.
Manufactured from premium N45 grade NdFeB (Neodymium-Iron-Boron), these magnets offer stronger magnetic performance than N42, N40, N38, and N35 grades. They are ideal for demanding applications requiring dependable holding power, including manufacturing, engineering, woodworking, robotics, product assemblies, and custom projects.
Each magnet is protected by a durable Nickel-Copper-Nickel-Epoxy quadruple-layer coating, combining the strength of traditional nickel plating with an outer epoxy layer that provides enhanced resistance to corrosion, moisture, scratches, and everyday wear.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a permanent rare earth magnet made from NdFeB (Neodymium-Iron-Boron), the strongest commercially available permanent magnetic material. These magnets produce exceptional magnetic force while maintaining a compact size, making them ideal for industrial, commercial, scientific, and consumer applications.
Disc magnets are widely used in magnetic fixtures, closures, sensors, robotics, woodworking, product assemblies, electronics, and countless DIY projects.
Neodymium magnets are also known as Neo magnets, NdFeB magnets, NIB magnets, or super magnets.
How Strong Is This Magnet?
This 1/2" x 3/8" N45 disc magnet provides approximately 19 pounds of pull force under ideal laboratory conditions using a thick, clean steel surface.
Actual holding force depends on several factors, including:
- Surface material
- Steel thickness
- Contact area
- Air gap
- Mounting method
- Environmental conditions
For maximum holding performance, use this magnet against a clean, flat, thick steel surface.
Note: Pull force values are estimates based on ideal testing conditions. Actual performance should always be verified for your specific application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N45 |
| Shape |
Disc |
| Diameter |
1/2" (12.7 mm) |
| Thickness |
3/8" (0.375" / 9.53 mm) |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel-Epoxy Quadruple Layer |
| Magnetization |
Through Thickness |
| Pull Force |
Approximately 19 lbs |
| Br Max |
13,800 Gauss |
| Certification |
ISO Certified |
Nickel-Copper-Nickel-Epoxy Quadruple-Layer Coating
These magnets feature a Nickel-Copper-Nickel-Epoxy (Ni-Cu-Ni-Epoxy) quadruple-layer coating, providing superior protection in environments where moisture and corrosion resistance are important.
Benefits
- Enhanced corrosion resistance
- Excellent protection against humidity and moisture
- Improved scratch and wear resistance
- Smooth black epoxy finish
- Greater durability than standard nickel-plated magnets in harsh environments
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General-purpose magnets |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial applications |
| N42 |
Higher |
Engineering and manufacturing |
| N45 |
Very High |
Industrial, marine, robotics, woodworking |
| N52 |
Maximum |
High-performance applications |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts, sensors, electronics |
| Medium |
General holding, woodworking |
| 1/2" x 3/8" |
Industrial fixtures, magnetic assemblies, heavy-duty closures |
| Large |
Heavy industrial mounting |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, jigs, magnetic assemblies |
| Engineering |
Product development and prototypes |
| Robotics |
Positioning systems and magnetic attachments |
| Marine |
Corrosion-resistant magnetic applications |
| Woodworking |
Hidden magnetic mounts and closures |
| DIY & Makers |
Custom projects, inventions, shop organization |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 19 pounds of pull force under ideal testing conditions.
Is N45 stronger than N42?
Yes. N45 delivers greater magnetic strength and energy than N42 magnets of the same dimensions.
What are the advantages of the epoxy coating?
The Nickel-Copper-Nickel-Epoxy quadruple-layer coating provides enhanced protection against moisture, corrosion, scratches, and wear, making it well suited for demanding environments.
Can it rust?
The epoxy coating provides excellent corrosion protection. However, if the coating becomes damaged and the magnet is exposed to moisture, corrosion may eventually occur.
Can it be used outdoors?
Yes. The epoxy-coated finish offers improved durability for outdoor and humid environments, although additional sealing is recommended for continuous exposure to water or saltwater.
What direction is it magnetized?
This magnet is magnetized through its thickness, with the north and south poles located on the two flat circular faces.
Do you offer bulk discounts?
Yes. Contact Super Magnet Store for wholesale pricing and volume discounts on large quantity orders.
Why Buy From Super Magnet Store?
- Premium N45 NdFeB rare earth magnets
- ISO-certified quality
- Stronger than N42, N40, N38, and N35 magnets
- Nickel-Copper-Nickel-Epoxy quadruple-layer coating for enhanced corrosion resistance
- Consistent magnetic performance
- Precision manufacturing for reliable results
- Competitive wholesale pricing
- Bulk discounts available
- Trusted supplier serving industrial, commercial, educational, and DIY customers worldwide
