N42 Neodymium Cylinder Magnet 1/4" x 1" Black Epoxy Coated Rare Earth Magnet
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Cylinder Magnet |
| Grade |
N42 |
| Shape |
Cylinder |
| Diameter |
1/4 inch (0.250") |
| Length |
1 inch (1.000") |
| Pull Force |
Approx. 9 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Black Epoxy-Copper-Nickel Triple Layer |
| Magnetization |
Through Length (Axially Magnetized) |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 9 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 magnets provide greater magnetic strength than N35, N38, and N40 magnets of the same size. |
| Can it be used outdoors? |
Yes. The Black Epoxy-Copper-Nickel triple-layer coating provides enhanced protection against moisture and corrosion, making it better suited for humid or outdoor environments than standard nickel-coated magnets. |
| What is it commonly used for? |
Hidden magnetic mounts, outdoor projects, magnetic closures, alignment systems, woodworking, industrial fixtures, and DIY applications requiring added corrosion resistance. |
Product Overview
The N42 Neodymium Cylinder Magnet 1/4" x 1" Black Epoxy Coated is engineered for applications that require dependable magnetic strength and enhanced environmental protection. Featuring a 1/4-inch diameter and 1-inch length, this slim cylinder magnet generates a deeper magnetic field than shorter magnets while fitting easily into drilled holes, narrow channels, and compact assemblies.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these rare earth magnets provide reliable holding power for woodworking, industrial fixtures, magnetic closures, alignment systems, product assembly, and embedded installations. The extended length delivers increased magnetic reach and stronger holding performance while remaining easy to install.
What distinguishes this magnet is its Black Epoxy-Copper-Nickel triple-layer coating. The nickel underlayers provide a smooth, durable foundation, while the outer black epoxy coating adds an additional barrier against moisture, oxidation, chemicals, and surface wear. This makes the magnet an excellent choice for humid environments, outdoor applications, marine-adjacent projects, and demanding industrial settings where standard nickel-coated magnets may experience faster wear.
What Is a Neodymium Cylinder Magnet?
A neodymium cylinder magnet is a rod-shaped permanent magnet manufactured from neodymium, iron, and boron (NdFeB). Its elongated design creates a deeper magnetic field than a similarly sized disc magnet, making it ideal for embedded mounting, magnetic latches, alignment pins, positioning systems, and precision mechanical assemblies.
Cylinder magnets are widely used in manufacturing, woodworking, electronics, robotics, and engineering because they combine exceptional holding power with a compact diameter that fits easily into drilled holes and tight spaces.
How Strong Is This Magnet?
This N42 cylinder magnet generates approximately 9 pounds of pull force under ideal conditions against a thick, flat steel surface. Its 1-inch length produces a deeper magnetic field than shorter cylinder magnets, providing stronger engagement and more secure holding performance.
The premium N42 magnetic grade offers an excellent balance of strength, reliability, and value, while the Black Epoxy-Copper-Nickel coating helps preserve performance by providing superior protection against corrosion in challenging environments.
Because cylinder magnets have a relatively small contact surface, actual pull force may vary depending on the application, material thickness, surface finish, air gap, and mounting method. Testing in your specific application is recommended.
Technical Specifications
| Property |
Specification |
| Material |
Neodymium (NdFeB) |
| Grade |
N42 |
| Shape |
Cylinder |
| Diameter |
0.250 inch (1/4") |
| Length |
1.000 inch (1") |
| Br Max |
13,200 Gauss |
| Pull Force |
Approx. 9 lbs* |
| Coating |
Black Epoxy-Copper-Nickel Triple Layer |
| Magnetization |
Through Length (Axially Magnetized) |
| Color |
Black |
| 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, woodworking, electronics |
| N52 |
Maximum |
High-performance engineering and precision manufacturing |
Cylinder Magnet Size Comparison
| Size |
Typical Use |
| Small |
Precision electronics, sensors, crafts |
| Medium |
Magnetic closures, woodworking, assemblies |
| Large |
Industrial fixtures, deep-set mounting, and heavy-duty holding |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Precision fixtures, locating pins, assembly tooling |
| Robotics |
Positioning systems, sensors, actuators |
| Electronics |
Embedded components, connectors, miniature devices |
| Marine & Outdoor |
Moisture-resistant magnetic mounting and closures |
| DIY |
Woodworking, resin casting, outdoor projects, custom organizers |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 9 pounds of pull force under ideal conditions against a thick steel surface.
Is N42 stronger than N35?
Yes. N42 delivers significantly greater magnetic strength than N35 magnets of the same dimensions while offering excellent overall performance.
Can it rust?
The Black Epoxy-Copper-Nickel triple-layer coating provides enhanced protection against moisture and corrosion compared to standard nickel-coated magnets. However, if the coating becomes deeply damaged or chipped, the neodymium core may eventually corrode.
Can it be used outdoors?
Yes. The black epoxy outer coating makes this magnet an excellent choice for outdoor, humid, and higher-moisture environments where additional corrosion resistance is desired.
What direction is it magnetized?
This cylinder magnet is axially magnetized through its length, meaning the north and south poles are located on the two circular ends.
Do you offer bulk discounts?
Yes. Super Magnet Store offers competitive wholesale pricing and quantity discounts for manufacturers, distributors, educational institutions, retailers, and OEM customers.
Why Buy From Super Magnet Store?
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Premium NdFeB rare earth magnets
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ISO-certified quality
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Durable Black Epoxy-Copper-Nickel triple-layer coating
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Enhanced corrosion resistance for humid and outdoor environments
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Consistent magnetic performance
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Precision manufacturing tolerances
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Bulk discounts available
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Fast shipping from a trusted magnet supplier
*Pull force is approximate. Because cylinder magnets have a relatively small contact surface, actual holding force may vary depending on the application, material thickness, surface finish, air gap, and mounting conditions. Testing in your specific application is recommended.
