3/4" 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 |
3/4" (0.750" / 19.05 mm) |
| Thickness |
3/8" (0.375" / 9.53 mm) |
| Pull Force |
Approximately 29 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 29 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? |
Industrial fixtures, magnetic assemblies, woodworking, robotics, engineering projects, product development, and DIY applications. |
Product Overview
These 3/4" x 3/8" N42 Neodymium Disc Magnets are designed for applications requiring exceptional holding power in a compact form. The 3/4-inch diameter provides a large contact surface for secure attachment, while the 3/8-inch thickness creates a deep magnetic field that delivers substantially greater holding force than thinner disc magnets.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets provide an outstanding balance of strength, reliability, and value. They are ideal for magnetic fixtures, woodworking, industrial equipment, product assemblies, robotics, engineering projects, and custom applications where dependable magnetic performance is essential.
Each magnet is protected with a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, offering excellent 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. Disc magnets deliver exceptional holding power while maintaining a compact profile, making them one of the most versatile magnet shapes available.
These magnets are magnetized through their thickness, placing the north and south poles on the two flat circular faces. Their design makes them ideal for magnetic fixtures, closures, woodworking, robotics, product assemblies, displays, electronics, 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 3/4" x 3/8" N42 disc magnet provides approximately 29 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 |
N42 |
| Shape |
Disc |
| Diameter |
3/4" (0.750" / 19.05 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 |
Approximately 29 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 that provides superior durability and corrosion resistance.
Benefits
- Excellent scratch resistance
- Superior 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 magnetic closures |
| 3/4" x 3/8" |
Heavy-duty fixtures, woodworking, robotics, industrial assemblies |
| Large |
Industrial mounting and fabrication |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, jigs, magnetic assemblies |
| Engineering |
Product development and prototyping |
| Robotics |
Positioning systems, sensors, and magnetic attachments |
| Electronics |
Components and magnetic assemblies |
| Woodworking |
Hidden magnetic mounts and heavy-duty closures |
| DIY & Makers |
Home improvement, custom builds, workshop organization |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 29 pounds of pull force under ideal testing conditions.
Is N42 stronger than N35 magnets?
Yes. N42 provides significantly greater magnetic strength and holding power than N35 magnets of the same size.
Can this magnet rust?
Like all neodymium magnets, it contains iron and may corrode if the protective coating becomes damaged or exposed to moisture for extended periods.
Can it 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 NdFeB rare earth magnets
- ISO-certified quality
- High-strength N42 grade
- Durable Nickel-Copper-Nickel triple-layer coating
- Excellent corrosion resistance
- Consistent magnetic performance
- Precision manufacturing for reliable results
- Competitive wholesale pricing
- Bulk discounts available
- Trusted by manufacturers, engineers, educators, and DIY makers worldwide
