N42 Neodymium Disc Magnet 5/16" x 1/8" Rare Earth Magnet
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Disc Magnet |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
5/16 inch (0.3125") |
| Thickness |
1/8 inch (0.125") |
| Pull Force |
Approx. 3.5–4 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 3.5–4 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 noticeably greater magnetic strength than N35, N38, and N40 magnets of the same dimensions. |
| Can it be used outdoors? |
Yes. The Nickel-Copper-Nickel triple-layer coating provides excellent corrosion resistance. For prolonged outdoor or marine exposure, additional sealing is recommended. |
| What is it commonly used for? |
Crafts, electronics, magnetic closures, sensors, woodworking, prototypes, educational projects, and DIY applications. |
Product Overview
The N42 Neodymium Disc Magnet 5/16" x 1/8" offers dependable magnetic performance in a compact, versatile size. Measuring 5/16 inch in diameter and 1/8 inch thick, this rare earth disc magnet provides excellent surface contact and reliable holding power while remaining small enough to fit into tight spaces and precision assemblies.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver stronger magnetic performance than N35, N38, and N40 magnets while maintaining excellent value for everyday industrial, commercial, and hobby applications. Their compact design makes them ideal for electronics, woodworking, crafts, magnetic closures, fixtures, prototypes, and educational demonstrations.
Each magnet is protected by a durable Nickel-Copper-Nickel triple-layer coating that resists corrosion, oxidation, and everyday wear while providing a smooth, polished finish. Designed for reliable long-term performance, these magnets are an excellent choice for engineers, makers, educators, manufacturers, and DIY enthusiasts.
What Is a Neodymium Disc Magnet?
A neodymium disc magnet is a circular permanent magnet manufactured from neodymium, iron, and boron (NdFeB). These rare earth magnets offer outstanding magnetic strength while remaining compact and lightweight, making them ideal for applications requiring maximum holding power in minimal space.
Disc magnets are commonly used in electronics, manufacturing, woodworking, magnetic closures, sensors, retail displays, crafts, and embedded assemblies because they combine a low-profile shape with excellent magnetic performance.
How Strong Is This Magnet?
This N42 neodymium disc magnet produces approximately 3.5 to 4 pounds of pull force under ideal conditions against a thick, flat steel surface. Its 5/16-inch diameter provides increased surface contact, while the 1/8-inch thickness creates a deeper magnetic field than thinner disc magnets, resulting in stronger holding power.
With a Br Max of approximately 13,200 Gauss, this magnet offers dependable performance for a wide variety of precision, industrial, and DIY applications.
Technical Specifications
| Property |
Specification |
| Material |
Neodymium Iron Boron (NdFeB) |
| Grade |
N42 |
| Shape |
Disc |
| Diameter |
0.3125 inch (5/16") |
| Thickness |
0.125 inch (1/8") |
| Pull Force |
Approx. 3.5–4 lbs |
| Br Max |
Approx. 13,200 Gauss |
| Max Operating Temperature |
176°F (80°C) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Through Thickness (poles on flat surfaces) |
| Material Note |
Brittle – handle carefully to avoid chipping |
| 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, electronics, woodworking |
| N52 |
Maximum |
High-performance engineering and precision manufacturing |
Disc Magnet Size Comparison
| Size |
Typical Use |
| Small |
Crafts & sensors |
| Medium |
General holding |
| Large |
Industrial mounting |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Fixtures, positioning, product assembly |
| Robotics |
Sensors and positioning systems |
| Electronics |
Components, switches, sensor assemblies |
| Education |
STEM projects and classroom demonstrations |
| DIY |
Crafts, woodworking, magnetic closures, prototypes |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 3.5 to 4 pounds of pull force under ideal conditions against a thick steel surface.
Is N42 stronger than N35?
Yes. N42 magnets provide significantly greater magnetic strength than N35 magnets while maintaining excellent value for engineering and general-purpose applications.
Can it rust?
Like all neodymium magnets, the core material can corrode if exposed. The Nickel-Copper-Nickel triple-layer coating provides excellent protection against moisture, oxidation, and everyday wear.
Can it be used outdoors?
Yes. The triple-layer nickel coating provides excellent corrosion resistance. For continuous outdoor or humid environments, an additional protective sealant is recommended.
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. 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?
-
Premium NdFeB rare earth magnets
-
ISO-certified quality
-
Reliable N42 magnetic performance
-
Durable Nickel-Copper-Nickel triple-layer coating
-
Excellent corrosion resistance
-
Precision manufacturing tolerances
-
Bulk discounts available
-
Fast shipping from a trusted magnet supplier
