3/4" x 3/4" N42 Diametrically Magnetized Neodymium Cylinder Magnets – Strong Rare Earth Magnets
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Cylinder Magnet |
| Grade |
N42 |
| Shape |
Cylinder |
| Diameter |
3/4" (0.750" / 19.05 mm) |
| Height |
3/4" (0.750" / 19.05 mm) |
| Pull Force |
Approximately 48 lbs* |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) Triple Layer |
| Magnetization |
Diametrically Magnetized (Through Diameter) |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
*Note: Actual pull force may vary depending on the application, contact surface, steel thickness, and mounting method. Testing in your specific application is recommended.
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 48 lbs of pull force under ideal conditions. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| Is N42 stronger than N35 magnets? |
Yes. N42 provides significantly greater magnetic strength than N35, N38, and N40 magnets of the same size. |
| Can it be used outdoors? |
Yes, but additional sealing is recommended for long-term outdoor exposure or humid environments. |
| What is it commonly used for? |
Magnetic couplings, rotary mechanisms, motors, sensors, engineering prototypes, automation, and custom industrial applications. |
Product Overview
These 3/4" x 3/4" N42 Diametrically Magnetized Neodymium Cylinder Magnets are engineered for specialized applications requiring a magnetic field across the diameter rather than through the ends. With equal 3/4-inch diameter and height, they provide a perfectly balanced cylindrical profile for precision assemblies, rotating mechanisms, and magnetic coupling systems.
Manufactured from premium N42 grade NdFeB (Neodymium-Iron-Boron), these magnets deliver powerful magnetic performance with approximately 48 pounds of pull force. Their diametrical magnetization places the north and south poles on opposite curved sides of the cylinder, making them ideal for motors, encoders, sensors, rotary positioning systems, and other applications where lateral magnetic fields are required.
Each magnet is protected by 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.
What Is a Diametrically Magnetized Cylinder Magnet?
A diametrically magnetized cylinder magnet is a permanent NdFeB (Neodymium-Iron-Boron) magnet with its magnetic poles located on opposite sides of the cylinder rather than on the flat ends.
Unlike standard cylinder magnets that are magnetized through their height, diametrically magnetized magnets produce a magnetic field across the diameter, making them ideal for:
- Magnetic couplings
- Electric motors
- Rotary encoders
- Position sensors
- Automation equipment
- Scientific instruments
- Precision engineering applications
Neodymium magnets are also commonly known as Neo magnets, NdFeB magnets, NIB magnets, or super magnets.
How Strong Is This Magnet?
This 3/4" x 3/4" N42 diametrically magnetized cylinder magnet delivers approximately 48 pounds of pull force under ideal laboratory conditions.
Actual magnetic performance depends on:
- Surface material
- Steel thickness
- Contact area
- Air gap
- Mounting method
- Magnetic circuit design
Because this magnet is diametrically magnetized, its performance differs from standard axially magnetized cylinder magnets and should be evaluated in the intended application.
Note: Pull force values are estimates based on ideal laboratory conditions. Actual performance should always be verified for your application.
Technical Specifications
| Specification |
Value |
| Magnet Type |
Neodymium Rare Earth Cylinder Magnet |
| Grade |
N42 |
| Shape |
Cylinder |
| Diameter |
3/4" (0.750" / 19.05 mm) |
| Height |
3/4" (0.750" / 19.05 mm) |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization |
Diametrically Magnetized (Through Diameter) |
| Pull Force |
Approximately 48 lbs* |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Nickel-Copper-Nickel Triple-Layer Coating
Every magnet features a Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer coating for superior durability and corrosion resistance.
Benefits
- Excellent scratch resistance
- Superior resistance to chipping and cracking
- Outstanding corrosion protection
- Smooth, polished metallic finish
- Long-lasting durability for industrial and commercial applications
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General-purpose magnets |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial applications |
| N42 |
Higher |
Engineering, motors, automation |
| N52 |
Maximum |
High-performance applications |
Cylinder Magnet Size Comparison
| Size |
Typical Use |
| Small |
Sensors, electronics, miniature motors |
| Medium |
General holding and magnetic fixtures |
| 3/4" x 3/4" |
Motors, magnetic couplings, encoders, industrial automation |
| Large |
Heavy-duty industrial equipment |
Applications by Industry
| Industry |
Common Uses |
| Manufacturing |
Precision fixtures and magnetic assemblies |
| Robotics |
Rotary positioning systems and actuators |
| Automation |
Magnetic couplings and motion control |
| Electronics |
Motors, encoders, and sensors |
| Engineering |
Product development and prototypes |
| Research |
Scientific instruments and laboratory equipment |
Common Questions About This Magnet
What is the pull force?
This magnet provides approximately 48 pounds of pull force under ideal testing conditions.
What does diametrically magnetized mean?
It means the magnet is magnetized through its diameter, with the north and south poles located on opposite curved sides instead of the flat ends. This creates a lateral magnetic field that is ideal for rotating assemblies and sensor applications.
Is N42 stronger than N35 magnets?
Yes. N42 provides significantly greater magnetic strength and holding power than N35 magnets of the same dimensions.
Can this magnet rust?
Like all neodymium magnets, it contains iron and may corrode if the protective coating becomes damaged or exposed to moisture for extended periods.
Can it be used outdoors?
Yes. However, additional sealing is recommended for long-term outdoor or marine applications.
What direction is it magnetized?
This magnet is diametrically magnetized through its diameter, with the magnetic poles located on the opposite curved sides of the cylinder.
Do you offer bulk discounts?
Yes. Contact Super Magnet Store for wholesale pricing and volume discounts on large quantity orders.
Why Buy From Super Magnet Store?
- Premium NdFeB rare earth magnets
- ISO-certified quality
- High-strength N42 grade
- Precision diametrical magnetization
- Durable Nickel-Copper-Nickel triple-layer coating
- Excellent corrosion resistance
- Consistent magnetic performance
- Competitive wholesale pricing
- Bulk discounts available
- Trusted by manufacturers, engineers, educators, and OEM customers worldwide
