N42 Neodymium Block Magnet with 3/16" Center Hole 3" x 1.5" x 0.75" Thick Rare Earth NdFeB Magnet
Quick Facts
| Attribute |
Value |
| Magnet Type |
Neodymium Rare Earth Block Magnet |
| Grade |
N42 |
| Shape |
Block with Center Hole |
| Length |
3" (76.2 mm) |
| Width |
1.5" (38.1 mm) |
| Height |
0.75" (19.05 mm) |
| Center Hole |
3/16" (0.1875") Diameter |
| Pull Force |
Approx. 165 lbs |
| Material |
NdFeB (Neodymium-Iron-Boron) |
| Coating |
Nickel-Copper-Nickel (Ni-Cu-Ni) |
| Magnetization |
Through Thickness |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
Quick Answers
| Question |
Answer |
| How strong is this magnet? |
Approximately 165 lbs of pull force under ideal conditions. |
| What size is the center hole? |
3/16-inch diameter. |
| What is this magnet made of? |
NdFeB (Neodymium-Iron-Boron) rare earth material. |
| What is it commonly used for? |
Wind turbine generators, industrial equipment, magnetic fixtures, automation systems, and heavy-duty engineering applications. |
| Is N42 stronger than N35? |
Yes. N42 provides greater magnetic strength than N40, N38, and N35 grades. |
Product Overview
Neodymium magnets are the world's strongest commercially available permanent magnets. Super Magnet Store offers premium-quality N42 neodymium block magnets manufactured to stringent quality standards using advanced production technology. These magnets deliver exceptional magnetic strength, dependable performance, and long-term durability for industrial, commercial, and engineering applications.
This N42 neodymium block magnet measures 3" x 1.5" x 0.75" and features a 3/16-inch center hole for convenient mechanical mounting. It generates approximately 165 lbs of pull force under ideal conditions, making it well suited for demanding magnetic assemblies and heavy-duty holding applications.
Manufactured from neodymium, iron, boron, and other minor elements, this magnet is stronger than N40, N38, and N35 grades. The Nickel-Copper-Nickel triple-layer coating provides excellent corrosion resistance and long service life.
Originally designed for applications such as 3 kW wind turbine generators, this magnet is also suitable for numerous industrial and engineering projects requiring secure mounting and exceptional magnetic performance.
What Is a Neodymium Block Magnet with a Center Hole?
A neodymium block magnet with a center hole combines the high holding force of a rare earth block magnet with the convenience of mechanical fastening. The through-hole allows the magnet to be securely mounted using bolts, shafts, or custom hardware, making it ideal for permanent installations and industrial equipment.
How Strong Is This Magnet?
This N42 neodymium block magnet produces approximately 165 lbs of pull force under ideal conditions. Actual holding strength depends on steel thickness, surface finish, air gaps, operating temperature, and mounting configuration. Its 13,200 Gauss Br Max provides reliable magnetic performance for demanding applications.
Technical Specifications
| Specification |
Value |
| Product Name |
N42 Neodymium Block Magnet with Center Hole |
| Material |
Neodymium Iron Boron (NdFeB) |
| Grade |
N42 |
| Shape |
Block with Through Hole |
| Dimensions |
3" × 1.5" × 0.75" |
| Center Hole Diameter |
3/16" (0.1875") |
| Coating |
Nickel-Copper-Nickel Triple Layer |
| Magnetization Direction |
Through Thickness (0.75") |
| Pole Orientation |
On the 3" × 1.5" Surfaces |
| Pull Force |
Approx. 165 lbs |
| Br Max |
13,200 Gauss |
| Certification |
ISO Certified |
| Operating Temperature |
Up to 176°F (80°C) |
Note: Pull force is an estimate only and varies depending on mounting surface and application.
Magnet Grade Comparison
| Grade |
Relative Strength |
Typical Applications |
| N35 |
Standard |
General purpose |
| N38 |
Moderate |
Consumer products |
| N40 |
High |
Industrial |
| N42 |
Higher |
Industrial equipment & engineering |
| N45 |
Premium |
High-performance assemblies |
| N48 |
Very High |
Heavy-duty applications |
| N50 |
Ultra High |
Advanced industrial systems |
| N52 |
Maximum |
Maximum-performance applications |
Common Applications
-
Wind turbine generators (including 3 kW systems)
-
Industrial machinery
-
Magnetic couplings
-
Heavy-duty fixtures and tooling
-
Generator and motor assemblies
-
Scientific and engineering equipment
-
Custom automation systems
Frequently Asked Questions
How much weight can this magnet hold?
This magnet provides approximately 165 lbs of pull force under ideal laboratory conditions. Actual holding force varies depending on the steel surface, alignment, air gap, and mounting method.
What is the purpose of the center hole?
The 3/16-inch through hole allows the magnet to be mechanically mounted using bolts, shafts, or custom fasteners for secure installation in machinery or equipment.
Can this magnet be used outdoors?
The Nickel-Copper-Nickel coating provides good corrosion resistance. For long-term outdoor or marine environments, additional sealing or protective housing is recommended.
What direction is it magnetized?
This magnet is magnetized through the 0.75-inch thickness, with the north and south poles located on the 3" × 1.5" faces.
Is this magnet suitable for wind turbines?
Yes. This magnet is commonly used in 3 kW wind turbine generator applications and other generator or motor designs requiring high magnetic performance.
Do you offer wholesale pricing?
Yes. Contact Super Magnet Store for competitive wholesale pricing and volume discounts on neodymium block magnets.
Safety Notice
This is an extremely powerful neodymium magnet capable of generating very high attractive forces. Use caution during handling to prevent pinch injuries, chipping, or breakage. Keep away from children, pacemakers, sensitive electronics, and magnetic storage media. Always follow recommended magnet safety guidelines.
Why Buy From Super Magnet Store?
-
Premium NdFeB rare earth magnets
-
High-strength N42 magnetic performance
-
Approximate 165 lb pull force
-
3/16-inch center hole for secure mounting
-
Nickel-Copper-Nickel triple-layer coating
-
ISO-certified manufacturing
-
Ideal for generators, wind turbines, and industrial equipment
-
Wholesale pricing available
-
Superior quality and consistent performance guaranteed
