3" x 1.5" N48 Neodymium Disc Magnets – Heavy-Duty Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N48 |
| Shape |
Disc |
| Diameter |
3" (76.2 mm) |
| Thickness |
1.5" (38.1 mm) |
| Pull Force |
Approximately 630 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
14,200 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, proper handling and safety precautions are strongly recommended.
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 630 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. N48 provides greater magnetic strength than N45, 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-duty industrial fixtures, magnetic separators, robotics, engineering projects, scientific equipment, manufacturing machinery, and high-performance magnetic assemblies. |
Product Overview
These 3" x 1.5" N48 Neodymium Disc Magnets are engineered for industrial applications requiring exceptional magnetic strength and deep magnetic penetration. The 3-inch diameter provides a broad magnetic contact area, while the substantial 1.5-inch thickness generates an extremely powerful magnetic field capable of producing approximately 630 pounds of pull force under ideal conditions. They are ideal for demanding industrial, commercial, and engineering applications where dependable high-strength performance is critical.
Manufactured from premium N48 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver significantly greater magnetic energy than N45, N42, N40, N38, and N35 grades while providing an outstanding balance between performance and value. They are commonly used in heavy-duty magnetic fixtures, magnetic separators, industrial automation, robotics, manufacturing equipment, scientific research, and specialized engineering projects.
Each magnet is protected by a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, providing outstanding resistance to corrosion, scratches, and chipping while maintaining a smooth, polished finish. Manufactured in ISO-certified facilities, these magnets deliver consistent quality and long-lasting reliability.
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 in manufacturing, robotics, engineering, scientific research, automation, electric motors, generators, and industrial machinery.
This magnet is magnetized through its 1.5-inch thickness (axially magnetized), placing the north and south poles on the two flat circular faces. This orientation provides maximum holding force and deep magnetic penetration, making it ideal for heavy-duty industrial fixtures and precision engineering applications.
Neodymium magnets are also commonly known as Neo magnets, NdFeB magnets, NIB magnets, or super magnets.
How Strong Is This Magnet?
This 3" x 1.5" N48 disc magnet delivers approximately 630 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
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 measured under ideal laboratory conditions. Actual performance should always be verified for your intended application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N48 |
| Shape |
Disc |
| Diameter |
3" (76.2 mm) |
| Thickness |
1.5" (38.1 mm) |
| Pull Force |
Approximately 630 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
14,200 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 |
| N48 |
Ultra High |
High-performance industrial applications |
| N52 |
Maximum |
Maximum magnetic performance |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts & sensors |
| Medium |
General holding |
| Large |
Industrial mounting |
| Extra Large (3" × 1.5") |
Heavy machinery, magnetic separators, lifting fixtures, and 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 630 pounds of pull force under ideal testing conditions.
Is N48 stronger than N35 magnets?
Yes. N48 delivers 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 eventually occur.
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 1.5-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 N48 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
