1/2" x 3/8" N42 Neodymium Disc Magnets – Strong Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
1/2" (12.7 mm) |
| Thickness |
3/8" (0.375" / 9.53 mm) |
| Pull Force |
Over 18 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Through Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 18 lbs of pull force under ideal conditions. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is N42 stronger than N35 magnets? |
Yes. N42 provides significantly greater magnetic strength than N35, N38, and N40 magnets of the same size. |
| Can it be used outdoors? |
Yes, but additional sealing is recommended for long-term outdoor exposure or humid environments. |
| What is it commonly used for? |
Magnetic fixtures, woodworking, engineering, robotics, product assemblies, industrial equipment, and DIY projects. |
Product Overview
These 1/2" x 3/8" N42 Neodymium Disc Magnets deliver powerful magnetic performance in a compact, heavy-duty design. The 1/2-inch diameter provides excellent surface contact, while the thicker 3/8-inch profile generates a deeper magnetic field and stronger holding force than thinner disc magnets, making them ideal for demanding applications.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets provide an excellent balance of strength, durability, and value. They are well suited for industrial fixtures, woodworking, magnetic closures, product assemblies, robotics, engineering projects, and custom DIY builds where dependable performance is essential.
Each magnet features a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating that provides outstanding resistance to corrosion, scratches, and chipping while maintaining a smooth, polished metallic finish.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a permanent magnet manufactured from NdFeB (Neodymium-Iron-Boron), the strongest commercially available magnetic material. Neodymium magnets offer exceptional magnetic force while remaining compact, making them a popular choice across industrial, commercial, scientific, and consumer applications.
Disc magnets are among the most versatile magnet shapes and are commonly used in magnetic fixtures, closures, sensors, robotics, electronics, woodworking, manufacturing, and product assemblies.
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" N42 disc magnet provides over 18 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 in your specific application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| 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 Triple Layer |
| Magnetization |
Through Thickness |
| Pull Force |
Over 18 lbs |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Nickel-Copper-Nickel Triple-Layer Coating
Every magnet features a Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating for outstanding durability and corrosion resistance.
Benefits
- Superior scratch resistance
- Excellent resistance to chipping and cracking
- Outstanding corrosion protection
- Smooth, polished metallic finish
- Long-lasting durability for industrial, commercial, and everyday applications
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General-purpose magnets |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial applications |
| N42 |
Higher |
Engineering, manufacturing, robotics |
| N52 |
Maximum |
High-performance applications |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts, sensors, miniature electronics |
| Medium |
General holding and woodworking |
| 1/2" x 3/8" |
Heavy-duty magnetic fixtures, closures, industrial assemblies |
| Large |
Industrial mounting and fabrication |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, jigs, magnetic assemblies |
| Engineering |
Product development and prototyping |
| Robotics |
Sensors, positioning systems, magnetic attachments |
| Electronics |
Components and magnetic assemblies |
| Woodworking |
Hidden magnetic mounts and closures |
| DIY & Makers |
Home improvement, custom builds, shop organization |
Common Questions About This Magnet
What is the pull force?
This magnet provides over 18 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 size.
Is this magnet coated?
Yes. It features a Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating that provides excellent protection against corrosion, oxidation, scratches, and everyday wear.
Can this magnet rust?
The protective coating helps prevent corrosion. However, if the coating becomes damaged and the magnet is exposed to moisture for extended periods, corrosion may eventually occur.
Can this magnet be used outdoors?
Yes. However, additional sealing is recommended for long-term outdoor or marine applications.
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 N42 NdFeB rare earth magnets
- ISO-certified quality
- Consistent magnetic performance
- Durable Nickel-Copper-Nickel triple-layer coating
- Excellent corrosion resistance
- Precision manufacturing for reliable performance
- Competitive wholesale pricing
- Bulk discounts available
- Trusted by manufacturers, engineers, educators, and DIY makers worldwide
