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Cube

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Counterbored

(1)

Stepped

(20)

Adhesive

(3)

Hole Size

#6 screw

(30)

#8 screw

(5)

#10 screw

(1)

Grade

N35

(2)

N42

(268)

N42SH

(7)

N52

(76)

Magnetization Direction

Thickness

(353)

Length (Bar)

(31)

Width

(9)

Length

1/16"

(3)

1/8"

(8)

3/16"

(7)

1/4"

(24)

5/16"

(1)

3/8"

(25)

7/16"

(1)

1/2"

(55)

9/16"

(1)

5/8"

(3)

3/4"

(42)

7/8"

(3)

(74)

1 1/4"

(6)

1 1/2"

(30)

(44)

2 3/4"

(1)

(15)

(9)

(1)

up to 1/8"

(11)

> 1/8" thru 1/4"

(31)

> 1/4" thru 3/8"

(26)

> 3/8" thru 1/2"

(56)

> 1/2" thru 3/4"

(46)

> 3/4" thru 1"

(77)

> 1" thru 2"

(80)

> 2"

(26)

Width

1/16"

(4)

1/8"

(27)

3/16"

(11)

.188"

(1)

1/4"

(58)

5/16"

(1)

3/8"

(34)

7/16"

(1)

1/2"

(100)

9/16"

(1)

5/8"

(4)

3/4"

(26)

7/8"

(3)

(49)

1 1/2"

(14)

(16)

(3)

up to 1/8"

(31)

> 1/8" thru 1/4"

(70)

> 1/4" thru 3/8"

(35)

> 3/8" thru 1/2"

(101)

> 1/2" thru 3/4"

(31)

> 3/4" thru 1"

(52)

> 1" thru 2"

(30)

> 2"

(3)

Thickness

1/32"

(8)

1/16"

(48)

1/10"

(2)

1/8"

(77)

3/16"

(15)

.188"

(1)

1/4"

(77)

3/8"

(25)

7/16"

(1)

1/2"

(61)

9/16"

(1)

3/4"

(9)

(18)

1 1/2"

(2)

(6)

up to 1/8"

(135)

> 1/8" thru 1/4"

(93)

> 1/4" thru 3/8"

(26)

> 3/8" thru 1/2"

(62)

> 1/2" thru 3/4"

(11)

> 3/4" thru 1"

(18)

> 1" thru 2"

(8)

Pull Force

up to 2 lb

(32)

> 2 thru 5 lb

(42)

> 5 thru 10 lb

(86)

> 10 thru 20 lb

(66)

> 20 thru 50 lb

(77)

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(29)

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(16)

> 250 lb

(5)

Plating

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(328)

Black Nickel Plated

(1)

Gold Plated

(2)

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(1)

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(17)

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(4)

Applications

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(1)

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(2)

Surplus

(4)

Hole Angle

82°

(36)

Max Operating Temp

176°F (80°C)

(346)

302°F (150°C)

(7)

Price

categories
> neodymium
> blocks

Various permanent rare earth block neodymium magnets

Strong Rare Earth Neodymium Block Magnets

Strong rare earth neodymium block magnets in block, square, rectangle and brick shapes

Neodymium block, rectangle and square magnets engineered for industrial use, electronics, and versatile DIY projects.

Versatile neodymium block magnets for industrial, electronic, and DIY applications

Huge inventory | Low prices | Fast shipping

Neodymium Block Magnets - are the strongest block magnets on the market and are classified as permanent rare-earth magnets. We offer many grades and sizes from small to large for block, brick, square, rectangle, cube and bar shapes. If you need a size or grade we do not stock, we provide Custom Block Neodymium Magnets in addition to full service expert magnet engineering and design advice, abundant free knowledge and DIY guides and free magnet strength and field calculators.

Types of block magnets

A block magnet is a wide term that includes brick magnets, square magnets, rectangle magnets, cube magnets and bar magnets. The below pictures group these into 3 distinct categories.

Block Magnets

All block, cube, bar, brick, square and rectangle magnets in one category
Bar Magnets

Block magnets long and thin or magnetized through length
Cube Magnets

Block magnets in perfect cube shape

Available coatings for block magnets

We provide the below nickel, black nickel, gold, rubber and plastic coatings for our block magnets. Our default 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 and silver available. See custom neodymium block magnets for more details

Nickel
Black Nickel
Gold
Rubber
Plastic

Neodymium Magnet Coatings

Learn which coating is best for your block magnets
Custom Block Magnets

Don't see the coating you need? Get a custom block magnet quote.

Technical information for block magnets

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: N35, N38, N40, N42, N45, N48, N50, N52.
Heat grades - Available in heat grades: N, NM, NH, NSH, NUH, NEH, NAH.
Sizes - Available from 1/32" or about 0.8mm, all the way up to 6" or about 150mm. We also have popular sizes like 1/4", 1/2", 3/4", 1", 2" with many sizes with countersunk holes. You can use our magnet finder tool and select metric sizes to find close equivalents to popular metric sizes like 5mm, 10mm, 25mm, 50mm diameters, hole size or thicknesses, etc.
Tolerances - Dimensional tolerances for all block magnets are 0.004" or 0.1mm.
Pull force - Testing for all block magnets pull forces was done with precision equipment in real world use situations. You can use our free Magnet Strength Calculator and listed pull force for each product as a reference point, but each use case may present a unique situation and pull force may vary.

Neodymium Magnet Specs

See specs for all neodymium magnets or check product page for block specific info
Magnet Grades

Learn more about block magnets in our comprehensive magnet grade blog article
Temperature & Neodymium Magnets

Learn how temperature affects neodymium magnets

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

General magnet info

Neodymium Magnet Info

Learn the basics about rare earth neodymium magnets
Magnetic Fields

Learn the basics about magnetic fields and gauss strength ratings
Magnet Basics

Learn the basics of magnets and how they work
Magnet FAQ

Answers to many common and uncommon magnet questions

Neodymium magnets (NdFeB) are the strongest rare earth permanent magnets available. Our neodymium block magnet selection features - plastic and rubber coated magnets, adhesive backed magnets and much more. Block magnets come in huge variety of sizes from tiny magnets to large very strong magnets and can be used for many different applications.

What is a block magnet? - A block magnet is a cube shaped magnet that can come in anything from a square to a rectangle to a long bar shape.

What are block magnets used for? - Block magnets can be used in a wide variety of applications such as holding, mounting, attaching, magnetic knife holders, magnetic water treatment, magnetic tool holders and more!

Block magnet applications and uses

Block magnets have flat surfaces giving them a large surface area and making them easy to integrate into any product or project. They are used in a wide variety of applications from fastening, hanging, industrial, recycling, assembly lines, electronics and consumer products 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.