3" x 2" N45 Neodymium Disc Magnets – Heavy-Duty Industrial Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N45 |
| Shape |
Disc |
| Diameter |
3" (76.2 mm) |
| Thickness |
2" (50.8 mm) |
| Pull Force |
Approximately 645 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
13,800 Gauss |
| Certification |
ISO Certified |
*Note: Actual pull force may vary depending on the application, contact surface, steel thickness, air gap, and mounting method. Due to the extremely high magnetic force, this magnet should be handled with extreme caution and appropriate safety equipment.
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 645 lbs of pull force under ideal conditions. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is this stronger than N35 magnets? |
Yes. N45 delivers significantly greater magnetic strength than N42, N40, N38, and N35 magnets of the same size. |
| Can it be used outdoors? |
Yes, but additional sealing is recommended for long-term outdoor or marine environments. |
| What is it commonly used for? |
Heavy industrial machinery, magnetic separators, manufacturing fixtures, engineering projects, robotics, research equipment, and specialized magnetic assemblies. |
Product Overview
These 3" x 2" N45 Neodymium Disc Magnets are engineered for industrial applications requiring extraordinary magnetic strength and maximum holding power. The 3-inch diameter provides a broad magnetic contact surface, while the substantial 2-inch thickness creates an exceptionally deep magnetic field capable of producing approximately 645 pounds of pull force under ideal conditions. These magnets are ideal for demanding industrial, manufacturing, and engineering applications where reliable high-force performance is essential.
Manufactured from premium N45 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver significantly greater magnetic energy than N42, N40, N38, and N35 grades while offering an excellent balance between strength and value. They are widely used in heavy-duty magnetic fixtures, magnetic separators, industrial automation, robotics, scientific research, lifting systems, and custom engineering projects.
Each magnet features a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, providing outstanding protection against corrosion, scratches, and chipping while maintaining a smooth, polished finish. Manufactured in ISO-certified facilities, these magnets deliver consistent quality and dependable long-term performance.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a permanent NdFeB (Neodymium-Iron-Boron) magnet manufactured from an alloy of neodymium, iron, and boron. Neodymium magnets are the strongest commercially available permanent magnets and are widely used throughout manufacturing, engineering, robotics, scientific research, industrial automation, electric motors, and heavy machinery.
This magnet is magnetized through its 2-inch thickness (axially magnetized), placing the north and south poles on the two flat circular faces. This orientation produces maximum holding force against ferromagnetic materials and is ideal for heavy-duty magnetic assemblies and industrial applications.
How Strong Is This Magnet?
This 3" x 2" N45 disc magnet delivers approximately 645 pounds of pull force under ideal laboratory conditions using a thick, clean steel plate.
Actual holding force depends on several factors, including:
- Surface material
- Steel thickness
- Contact area
- Air gap
- Mounting method
- Environmental conditions
Because of its extremely powerful magnetic field, this magnet should be handled carefully. Improper handling can result in severe pinch injuries or damage to nearby tools, equipment, or electronic devices.
Note: Pull force values are based on ideal laboratory conditions. Always test performance in your intended application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N45 |
| Shape |
Disc |
| Diameter |
3" (76.2 mm) |
| Thickness |
2" (50.8 mm) |
| Pull Force |
Approximately 645 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
13,800 Gauss |
| Certification |
ISO Certified |
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General purpose |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial |
| N42 |
Higher |
Engineering |
| N45 |
Very High |
Heavy-duty industrial applications |
| N52 |
Maximum |
High-performance |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts & sensors |
| Medium |
General holding |
| Large |
Industrial mounting |
| Extra Large (3" × 2") |
Heavy machinery, magnetic separators, lifting fixtures, industrial engineering |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Heavy-duty fixtures & jigs |
| Industrial |
Magnetic separators & machinery |
| Robotics |
High-force positioning systems |
| Engineering |
Product development & specialized equipment |
| Scientific |
Laboratory research & testing |
| Energy |
Motors, generators & magnetic assemblies |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 645 pounds of pull force under ideal testing conditions.
Is N45 stronger than N35 magnets?
Yes. N45 offers substantially greater magnetic strength and holding power than N35 magnets of the same dimensions.
Can it rust?
The Nickel-Copper-Nickel triple-layer coating provides excellent protection against corrosion. If the coating becomes damaged and moisture reaches the magnet, corrosion may occur over time.
Can it be used outdoors?
Yes. However, additional sealing is recommended for prolonged outdoor exposure, marine environments, or high-humidity conditions.
What direction is it magnetized?
This magnet is magnetized through its 2-inch thickness (axially magnetized), 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 commercial, industrial, OEM, educational, and reseller orders.
Why Buy From Super Magnet Store?
- Premium NdFeB rare earth magnets
- ISO-certified quality
- High-performance N45 magnetic grade
- Durable Nickel-Copper-Nickel triple-layer coating
- Exceptional industrial holding power
- Precision manufacturing
- Excellent corrosion resistance
- Competitive pricing
- Bulk discounts available
- Fast shipping
- Trusted by manufacturers, engineers, researchers, industrial professionals, and OEMs worldwide
