Neodymium Magnets N42 Block 3/4" x 1/4" x 1/2" Thick NdFeB Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Block Magnet |
| Grade |
N42 |
| Shape |
Block |
| Length |
3/4" (19.05 mm) |
| Width |
1/4" (6.35 mm) |
| Height |
1/2" (12.7 mm) |
| Pull Force |
Approx. 24 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) |
| Magnetization |
Through 1/2" Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
| Weight |
0.05 lbs |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 24 lbs of pull force under ideal conditions. |
| Is N42 stronger than N35? |
Yes. N42 provides significantly greater magnetic strength than N35, N38, and N40 grades. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Can this magnet rust? |
The Nickel-Copper-Nickel coating offers corrosion resistance, but prolonged exposure to moisture may eventually cause corrosion if not properly protected. |
| What is it commonly used for? |
Precision fixtures, sensor mounts, magnetic clamping systems, tool holders, cabinet closures, and industrial assemblies. |
Product Overview
Engineered for precision assemblies and compact fixtures, this N42 neodymium block magnet delivers high magnetic strength in a manageable size. Its rectangular profile provides stable holding power while allowing seamless integration into electronic housings, sensor fixtures, magnetic clamping systems, and alignment jigs.
Measuring 3/4" x 1/4" x 1/2", this compact rare earth magnet produces approximately 24 lbs of pull force under ideal conditions. Manufactured from premium neodymium, iron, boron, and other minor elements, it offers an excellent balance of performance, durability, and cost-efficiency for medium-load industrial and engineering applications.
The durable Nickel-Copper-Nickel triple-layer coating provides enhanced corrosion resistance and long-term durability. Manufactured under ISO-certified quality standards, this magnet delivers dependable performance and consistent magnetic properties for demanding applications.
What Is a Neodymium Block Magnet?
A neodymium block magnet is a rectangular rare earth permanent magnet made from neodymium, iron, and boron (NdFeB). Block magnets provide exceptional holding force and a large contact surface area, making them ideal for industrial fixtures, engineering projects, robotics, electronics, automation equipment, and custom magnetic assemblies.
How Strong Is This Magnet?
This N42 neodymium block magnet generates approximately 24 lbs of pull force under ideal conditions. Actual holding strength depends on steel thickness, surface finish, air gaps, temperature, and mounting configuration. With a BrMax rating of 13,200 Gauss, it provides dependable magnetic performance for medium-load industrial and precision applications.
Technical Specifications
| Specification |
Value |
| Product Name |
N42 Neodymium Block Magnet |
| Material |
Neodymium Iron Boron (NdFeB) |
| Grade |
N42 |
| Shape |
Block |
| Length |
3/4" (19.05 mm) |
| Width |
1/4" (6.35 mm) |
| Thickness |
1/2" (12.7 mm) |
| Pull Force |
Approx. 24 lbs |
| Br Max |
13,200 Gauss |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization Direction |
Through Thickness (0.5") |
| Maximum Operating Temperature |
80°C (176°F) |
| Weight |
0.05 lbs |
| 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 |
Block Magnet Size Comparison
| Size |
Typical Applications |
| Small Blocks |
Electronics |
| Medium Blocks |
Fixtures |
| Large Blocks |
Industrial assemblies |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Precision fixtures & tooling |
| Engineering |
Product development |
| Robotics |
Motion systems |
| Electronics |
Sensor mounts & assemblies |
| Automation |
Alignment systems |
| Education |
STEM projects |
| DIY |
Custom builds |
Common Questions About This Magnet
How can I mount this neodymium block magnet securely?
For flush or recessed installations, use a high-strength epoxy adhesive or embed the magnet in a non-magnetic housing. Avoid excessive impact, which may chip the magnet.
Is N42 strong enough for light industrial applications?
Yes. N42 grade magnets provide excellent magnetic strength and are well suited for medium-load industrial, engineering, and automation projects.
Can I use this magnet outdoors?
It can be used in covered or controlled outdoor environments. For prolonged exposure to rain, humidity, or harsh weather conditions, sealing the magnet in a weather-resistant housing is recommended.
What is the maximum temperature this magnet can safely handle?
This magnet is rated for continuous operation up to 80°C (176°F). Exposure to higher temperatures may permanently reduce magnetic strength.
Is it safe near electronics?
Neodymium magnets can affect sensitive electronic devices. Always verify clearance requirements and magnetic field compatibility before installation.
What direction is it magnetized?
This magnet is magnetized through the 1/2-inch thickness, with the north and south poles located on the 3/4" x 1/4" faces.
Do you offer wholesale pricing?
Yes. Contact Applied Magnets for volume discounts and wholesale pricing on neodymium magnets.
Safety Note
Neodymium magnets are extremely strong and brittle. They may chip, crack, or break if allowed to collide with metal objects or other magnets. Keep away from children, pacemakers, sensitive electronics, and magnetic storage devices. Always handle with care and wear appropriate eye protection when working with strong magnets.
Why Buy From Super Magnet Store?
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Premium NdFeB rare earth magnets
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Consistent magnetic performance
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ISO-certified manufacturing
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Competitive pricing
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Wholesale discounts available
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Superior quality and performance guaranteed
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Reliable strength for industrial and engineering applications
