1.5" x 1/2" N42 Neodymium Disc Magnets – Strong Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
1.5" (38.1 mm) |
| Thickness |
1/2" (0.500" / 12.7 mm) |
| Pull Force |
Approximately 79 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
*Note: Actual pull force may vary depending on the application, contact surface, steel thickness, air gap, and mounting method. Testing in your specific application is recommended.
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 79 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. N42 provides greater magnetic strength than 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 magnetic fixtures, industrial machinery, woodworking, robotics, magnetic separators, engineering projects, and manufacturing equipment. |
Product Overview
These 1.5" x 1/2" N42 Neodymium Disc Magnets are engineered to provide exceptional holding power for demanding industrial, commercial, and workshop applications. The 1.5-inch diameter creates a large magnetic contact surface, while the 1/2-inch thickness generates a deep magnetic field capable of producing approximately 79 pounds of pull force under ideal conditions. This combination of size and strength makes these magnets ideal for applications requiring dependable, high-performance magnetic holding.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver significantly greater magnetic strength than N40, N38, and N35 grades. They are widely used in industrial tooling, manufacturing equipment, robotics, magnetic fixtures, engineering prototypes, and heavy-duty product assemblies where reliable performance is essential.
Each magnet features a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, providing excellent resistance to corrosion, scratches, and chipping while maintaining a smooth, polished finish. Manufactured in ISO-certified facilities, these magnets offer consistent quality and long service life.
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, engineering, robotics, automation, scientific equipment, and consumer products.
This magnet is magnetized through its 1/2-inch thickness (axially magnetized), placing the north and south poles on the two flat circular faces. This magnetic orientation provides maximum holding force against steel surfaces and makes disc magnets ideal for magnetic fixtures, tooling, product assemblies, machinery, and industrial applications.
Neodymium magnets are also commonly known as Neo magnets, NdFeB magnets, NIB magnets, or super magnets.
How Strong Is This Magnet?
This 1.5" x 1/2" N42 disc magnet delivers approximately 79 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 laboratory conditions. Actual performance should always be verified for your intended application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
1.5" (38.1 mm) |
| Thickness |
1/2" (0.500" / 12.7 mm) |
| Pull Force |
Approximately 79 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness (Axially Magnetized) |
| Br Max |
13,200 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 |
| N52 |
Maximum |
High-performance |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts & sensors |
| Medium |
General holding |
| Large (1.5" × 1/2") |
Industrial mounting, heavy-duty fixtures, magnetic assemblies |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures & jigs |
| Robotics |
Sensors & positioning |
| Electronics |
Components |
| Industrial |
Magnetic separators, tooling, machinery |
| Education |
STEM projects |
| DIY |
Home projects and workshop organization |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 79 pounds of pull force under ideal testing conditions.
Is N42 stronger than N35 magnets?
Yes. N42 delivers significantly 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 1/2-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 magnets
- ISO-certified quality
- High-performance N42 magnetic grade
- Durable Nickel-Copper-Nickel triple-layer coating
- Consistent magnetic performance
- Precision manufacturing
- Excellent corrosion resistance
- Competitive pricing
- Bulk discounts available
- Fast shipping
- Trusted by manufacturers, engineers, educators, businesses, and DIY enthusiasts worldwide
