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Neodymium Block Magnets

Sizes range from tiny cubes and thin blocks to large heavy-duty block magnets

Powerful rare earth neodymium block, rectangle and square magnets engineered for industrial use, electronics, and versatile DIY projects.

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Strong Rare Earth Neodymium Block Magnets for Sale

Huge stock and selection of rare earth neodymium block magnets. Permanent neodymium square, rectangle and block magnets come in multiple grades from N35 to the strongest grade N52. Our standard block magnets are N42 which a nice balance between high performance and low cost. We offer block magnets, cube magnets and bar magnets which are the typical north south magnets often used in science class. ranging from small bricks with lengths and thickness as low as 1/16" all the way up to very powerful blocks 6" for heavy duty applications. We also offer thin flat block magnets with a thickness as low as 1/32" (~.8mm).

We offer large bulk discounts for all block magnets and have additional promotions, sales and special discount coupons for our newsletter subscribers.

Block Magnet Coatings

We offer the below nickel (Ni-Cu-Ni), black nickel (Ni-Cu-Ni-BlackNi), gold (Ni-Cu-Ni + Au), rubber and plastic coatings for our block magnets. Our standard coating is a 3-layer nickel-copper-nickel (Ni-Cu-Ni) to protect from moisture and corrosion, enhance durability and to give a nice smooth silver finish. Additional coatings such as epoxy (Ni-Cu-Ni + epoxy) and silver (Ni-Cu-Ni + Ag) available. See custom neodymium block magnets for more details

Nickel
Black Nickel
Gold
Rubber
Plastic

Block Magnet Magnetization Directions

We offer block magnets in through thickness, through width and through length magnetization directions. Most block magnets are through their thickness dimension and bar magnets are through the length dimension and resemble the traditional north and south pole magnets used in science experiments. Our products are listed in order of length, width, then thickness. Below are diagrams of three magnetic polarizations we provide.

Through thickness polarization
Through width polarization
Through length polarization

Block Magnet Specs

Get more detailed technical information and specifications for neodymium block magnets below on our specs page and product specific features, downloads, drawings, magnetic field data and stats on individual product pages.

Strength Grades

Available in strength grades:

Heat Grades

Available in heat grades:

Sizes

Available in tiny sizes from 1/32" or about 0.8mm up to large 6" or about 150mm. Popular sizes like 1/4", 1/2", 3/4", 1", 2", many with countersunk holes. Use our magnet finder tool for metric equivalents.

Tolerances

Dimensional tolerances for all block magnets are 0.004" or 0.1mm.

Pull Force

Magnet strength testing for all block magnets was done with precision equipment. Use our free Magnet Strength Calculator. Pull force may vary by use case.

Block Magnet General Information

Below are some common questions we get regarding block magnets.

What is a block magnet?

A block magnet is a magnet in a brick shape with a length, width and height (thickness) that can come in anything from a square or rectangle to a long bar or cube shape.

Block Magnet Applications

Block magnets are used in a wide variety of applications from industrial, recycling, electronics to DIY projects and every day use. Check out our applications categories, magnet uses page and blog to learn more about how neodymium block magnets are used.

Neodymium Block Magnets

1/4 x 1/2 x 3/16 Inch Neodymium Rare Earth Stepped Block Magnet N42 SB483-IN

1/4 x 1/2 x 3/16 Inch Neodymium Rare Earth Stepped Block Magnet N42 SB483-OUT

5/16 x 5/16 x 5/16 Inch Neodymium Rare Earth Cube Magnet N42 B555

3/8 x 1/8 x 1/16 Inch Neodymium Rare Earth Bar Magnet N42 B621

3/8 x 3/16 x 1/32 Inch Neodymium Rare Earth Bar Magnet N42 B6301

3/8 x 3/16 x 1/16 Inch Neodymium Rare Earth Bar Magnet N42 B631

3/8 x 3/16 x 1/16 Inch Neodymium Rare Earth Bar Magnet N52 B631-N52

3/8 x 3/16 x 1/8 Inch Neodymium Rare Earth Bar Magnet N42 B632

3/8 x 3/16 x 3/16 Inch Neodymium Rare Earth Bar Magnet N42 B633

3/8 x 1/4 x 1/16 Inch Neodymium Rare Earth Block Magnet N42 B641

3/8 x 1/4 x 1/8 Inch Neodymium Rare Earth Block Magnet N42 B642

3/8 x 1/4 x 1/4 Inch Neodymium Rare Earth Block Magnet N42 B644

3/8 x 3/8 x 1/16 Inch Neodymium Rare Earth Block Magnet N42 B661

3/8 x 3/8 x 1/8 Inch Neodymium Rare Earth Block Magnet N42 B662

3/8 x 3/8 x 1/8 Inch Neodymium Rare Earth Block Magnet N52 B662-N52

3/8 x 3/8 x 3/16 Inch Neodymium Rare Earth Block Magnet N42 B663

3/8 x 3/8 x 1/4 Inch Neodymium Rare Earth Block Magnet N42 B664

3/8 x 3/8 x 1/4 Inch Neodymium Rare Earth Stepped Block Magnet N42 SB664-IN

3/8 x 3/8 x 1/4 Inch Neodymium Rare Earth Stepped Block Magnet N42 SB664-OUT

3/8 x 3/8 x 3/8 Inch Neodymium Rare Earth Cube Magnet N42 B666