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SKU: ND028-D

Neodymium Magnets 0.4 x 2.4 inch Diametrically Magnetized

$ 9.98
$ 9.98

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0.4" x 2.4" N48 Diametrically Magnetized Neodymium Cylinder Magnets – Strong Rare Earth Magnets

Quick Facts

Attribute Value
Magnet Type Neodymium Rare Earth Cylinder Magnet
Grade N48
Shape Cylinder
Diameter 0.4" (10 mm)
Length 2.4" (61 mm)
Pull Force Approximately 60 lbs*
Material NdFeB (Neodymium-Iron-Boron)
Coating Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer
Magnetization Diametrically Magnetized
Br Max 14,200 Gauss
Certification ISO Certified

*Note: Actual pull force may vary depending on the application, contact surface, steel thickness, air gap, and mounting method. Diametrically magnetized magnets perform differently than axially magnetized magnets in many applications. Testing in your specific application is recommended.

Quick Answers

Question Answer
How strong is this magnet? Approximately 60 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. N48 delivers substantially greater magnetic strength than N45, N42, N40, N38, and N35 magnets of the same size.
Can it be used outdoors? Yes, but additional sealing is recommended for long-term outdoor or marine environments.
What is it commonly used for? Magnetic couplings, rotary mechanisms, encoders, sensor systems, motors, engineering prototypes, and precision alignment assemblies.

Product Overview

These 0.4" x 2.4" N48 Diametrically Magnetized Neodymium Cylinder Magnets are engineered for specialized applications where magnetic orientation is just as important as magnetic strength. Unlike standard cylinder magnets that are magnetized through their length, these magnets are diametrically magnetized, placing the north and south poles on opposite curved sides of the cylinder. This creates a lateral magnetic field that is ideal for rotating components, sensing systems, and precision mechanical assemblies.

The 0.4-inch diameter allows these magnets to fit into compact assemblies, while the 2.4-inch length provides increased stability and a larger magnetic interaction zone. Manufactured from premium N48 grade NdFeB (Neodymium-Iron-Boron) material, they produce approximately 60 pounds of pull force under ideal conditions and offer stronger performance than N45, N42, N40, N38, and N35 magnets.

Each magnet features a durable Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating, providing excellent resistance to corrosion, scratches, and chipping while maintaining a smooth, polished finish. Manufactured in ISO-certified facilities, these magnets deliver consistent quality and dependable long-term performance.

What Is a Diametrically Magnetized Cylinder Magnet?

A diametrically magnetized cylinder magnet is a permanent NdFeB (Neodymium-Iron-Boron) magnet whose magnetic poles are located on opposite sides of the cylinder's diameter rather than on its ends. This produces a magnetic field that extends sideways from the curved surface, making it ideal for rotating magnetic fields and precision positioning.

Diametrically magnetized cylinder magnets are commonly used in:

  • Magnetic couplings
  • Electric motors
  • Rotary encoders
  • Hall-effect sensor systems
  • Precision positioning devices
  • Scientific instruments
  • Engineering prototypes

This magnet is magnetized through its 0.4-inch diameter, with the north and south poles located on the curved sides.

How Strong Is This Magnet?

This 0.4" x 2.4" N48 cylinder magnet delivers approximately 60 pounds of pull force under ideal laboratory conditions.

Actual holding force depends on several factors, including:

  • Surface material
  • Steel thickness
  • Contact area
  • Air gap
  • Mounting method
  • Magnetic orientation
  • Environmental conditions

Because this magnet is diametrically magnetized, its magnetic behavior differs from standard axially magnetized cylinder magnets. Performance should always be evaluated in the intended application.

Technical Specifications

Specification Value
Magnet Type Neodymium Rare Earth Cylinder Magnet
Grade N48
Shape Cylinder
Diameter 0.4" (10 mm)
Length 2.4" (61 mm)
Pull Force Approximately 60 lbs*
Material NdFeB (Neodymium-Iron-Boron)
Coating Nickel-Copper-Nickel Triple Layer
Magnetization Diametrically Magnetized
Br Max 14,200 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
N48 Very High Precision industrial applications
N52 Maximum High-performance

Cylinder Magnet Size Comparison

Size Typical Use
Small Sensors & electronics
Medium General holding
Long Cylinder (0.4" × 2.4") Rotary systems, magnetic couplings, encoders, precision alignment

Applications by Industry

Industry Common Uses
Manufacturing Precision fixtures & magnetic couplings
Robotics Rotary position sensing
Electronics Encoders & Hall-effect sensors
Industrial Motors & automation equipment
Research Laboratory instruments
DIY Custom mechanical and engineering projects

Common Questions About This Magnet

What is the pull force?

This magnet provides approximately 60 pounds of pull force under ideal testing conditions.

What does diametrically magnetized mean?

The north and south poles are located on the curved sides of the cylinder instead of the ends, creating a magnetic field that extends sideways.

Is N48 stronger than N35 magnets?

Yes. N48 provides significantly greater magnetic strength and energy than N35 magnets of the same dimensions.

Can it rust?

The Nickel-Copper-Nickel triple-layer coating provides excellent corrosion resistance. If the coating becomes damaged, moisture exposure may eventually cause corrosion.

Can it be used outdoors?

Yes. Additional sealing is recommended for prolonged outdoor or marine environments.

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 rare earth magnets
  • ISO-certified quality
  • High-performance N48 magnetic grade
  • Precision diametrical magnetization
  • Durable Nickel-Copper-Nickel triple-layer coating
  • Consistent magnetic performance
  • Excellent corrosion resistance
  • Competitive pricing
  • Bulk discounts available
  • Fast shipping
  • Trusted by engineers, manufacturers, researchers, educators, and DIY professionals worldwide


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