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SKU: ND066-Epoxy

Rare Earth Magnets Epoxy-Cu-Ni 1.5 in x 1/4 in Neodymium Disc

$ 17.25
$ 17.25

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1.5" x 1/4" N42 Epoxy-Coated Neodymium Disc Magnets – Strong Rare Earth Magnets

Quick Facts

Attribute Value
Magnet Type Neodymium Rare Earth Disc Magnet
Grade N42
Shape Disc
Diameter 1.5" (38.1 mm)
Thickness 1/4" (0.250" / 6.35 mm)
Pull Force Approximately 40 lbs*
Material NdFeB (Neodymium-Iron-Boron)
Coating Epoxy + Copper + Nickel (3-Layer)
Magnetization Through Thickness (Axially Magnetized)
Br Max 13,200 Gauss
Certification ISO Certified

*Note: Actual pull force may vary depending on the application, contact surface, steel thickness, air gap, and mounting method. Testing in your specific application is recommended.

Quick Answers

Question Answer
How strong is this magnet? Approximately 40 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 greater magnetic strength than N40, N38, and N35 magnets of the same size.
Can it be used outdoors? Yes. The Epoxy + Copper + Nickel coating offers enhanced corrosion resistance, making it better suited for humid and outdoor environments than standard nickel-coated magnets.
What is it commonly used for? Marine equipment, outdoor fixtures, woodworking, industrial machinery, magnetic separators, robotics, and engineering projects.

Product Overview

These 1.5" x 1/4" N42 Epoxy-Coated Neodymium Disc Magnets combine powerful magnetic performance with enhanced corrosion protection for demanding environments. The 1.5-inch diameter provides a broad magnetic contact surface, while the 1/4-inch thickness creates a concentrated magnetic field capable of producing approximately 40 pounds of pull force under ideal conditions. Their balanced design makes them an excellent choice for industrial equipment, woodworking, automation, and outdoor applications.

Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver significantly greater magnetic strength than N40, N38, and N35 grades. They provide dependable holding power for magnetic fixtures, manufacturing equipment, engineering assemblies, and countless commercial applications.

Unlike standard nickel-plated magnets, these magnets feature an Epoxy + Copper + Nickel 3-layer coating that offers superior corrosion resistance and excellent adhesion. This coating makes them particularly well suited for humid environments, light outdoor use, and applications where additional protection against moisture is beneficial.

What Is a Neodymium Disc Magnet?

A neodymium disc magnet is a permanent NdFeB (Neodymium-Iron-Boron) magnet manufactured from an alloy of neodymium, iron, and boron. Neodymium magnets are the strongest commercially available permanent magnets and are widely used throughout manufacturing, engineering, robotics, automation, scientific equipment, and consumer products.

This magnet is magnetized through its 1/4-inch thickness (axially magnetized), placing the north and south poles on the two flat circular faces. This magnetic orientation provides maximum holding force against steel surfaces and makes disc magnets ideal for magnetic fixtures, tooling, product assemblies, and industrial applications.

Neodymium magnets are also known as Neo magnets, NdFeB magnets, NIB magnets, or super magnets.

How Strong Is This Magnet?

This 1.5" x 1/4" N42 disc magnet provides approximately 40 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 laboratory conditions. Actual performance should always be verified for your intended application.

Technical Specifications

Specification Value
Magnet Type Neodymium Rare Earth Disc Magnet
Grade N42
Shape Disc
Diameter 1.5" (38.1 mm)
Thickness 1/4" (0.250" / 6.35 mm)
Pull Force Approximately 40 lbs*
Material NdFeB (Neodymium-Iron-Boron)
Coating Epoxy + Copper + Nickel (3-Layer)
Magnetization Through Thickness (Axially Magnetized)
Br Max 13,200 Gauss
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

Disc Magnet Size Comparison

Size Typical Use
Small Crafts & sensors
Medium General holding
Large (1.5" × 1/4") Industrial mounting, heavy-duty fixtures, magnetic assemblies

Applications by Industry

Industry Common Uses
Manufacturing Fixtures & jigs
Robotics Sensors & positioning
Electronics Components
Marine Corrosion-resistant magnetic mounting
DIY Home projects
Industrial Magnetic separators, tooling, automation systems

Common Questions About This Magnet

What is the pull force?

This magnet provides approximately 40 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 it rust?

The Epoxy + Copper + Nickel 3-layer coating provides superior corrosion resistance compared to standard nickel coatings. If the coating becomes damaged, corrosion may still occur over time.

Can it be used outdoors?

Yes. The epoxy-coated finish makes this magnet better suited for outdoor and humid environments than standard nickel-coated magnets. For marine or saltwater applications, additional sealing is still recommended.

What direction is it magnetized?

This magnet is magnetized through its 1/4-inch thickness (axially magnetized), 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 commercial, industrial, OEM, educational, and reseller orders.

Why Buy From Super Magnet Store?

  • Premium NdFeB magnets
  • ISO-certified quality
  • High-performance N42 magnetic grade
  • Durable Epoxy + Copper + Nickel 3-layer coating
  • Superior corrosion resistance
  • Consistent magnetic performance
  • Precision manufacturing
  • Competitive pricing
  • Bulk discounts available
  • Fast shipping
  • Trusted by manufacturers, engineers, educators, businesses, and DIY enthusiasts worldwide


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