Neodymium Block Magnets

High tolerance neodymium rare earth block, cube & square magnets, N42 grade Guaranteed tolerances for repeatability with exceptional pricing.

Where indicated, all our neodymium magnets are fully sintered & individually pressed to optimize uniformity of magnetic orientation & are manufactured according to National Magnetic Standards. This ensures that strength variation of +/- 5% between magnets is met both within batches & from batch to batch. You can be certain that our magnets will make your sensors, switches & latches work reliably & according to design.

Coatings

  1. Standard is Cu-Ni-Cu & meets 10 hour salt spray test.
  2. Optional: Epoxy, Parylene, Gold, & more.

Certifications

  1. Certificates of Compliance available on request.
  2. All magnets made in ISO9002 certified facility
  3. ROHS & MSDS certificates available.
Displaying 1 to 34 (of 34 products)
2.5x2.5x1mm Nd Square Magnets

2.5x2.5x1mm Nd Square Magnets

SKU: 44220-1
$0.24USD or lower Each
2.5x2.5x2.5mm Cube Magnets

2.5x2.5x2.5mm Cube Magnets

SKU: 44220-2.5
$0.12USD or lower Each
5x2.5x1mm Thin Nd Block Magnet

5x2.5x1mm Thin Nd Block Magnet

SKU: 44221-1
$0.11USD or lower Each
5x5x1mm Square Magnets

5x5x1mm Square Magnets

SKU: 44222-1
$0.13USD or lower Each
5x5x2.5mm NdFeB Square Magnets

5x5x2.5mm NdFeB Square Magnets

SKU: 44222-2.5
$0.30USD or lower Each
5x5x5mm NdFeB Cube Magnets

5x5x5mm NdFeB Cube Magnets

SKU: 44222-5
$0.32USD or lower Each
7.5x7.5x1mm Square Magnets

7.5x7.5x1mm Square Magnets

SKU: 44225-1
$0.13USD or lower Each
7.5x7.5x2.5mm Nd Square Magnet

7.5x7.5x2.5mm Nd Square Magnet

SKU: 44225-2.5
$0.35USD or lower Each
7.5x7.5x5mm Square Magnets

7.5x7.5x5mm Square Magnets

SKU: 44225-5
$0.50USD or lower Each
7.5x7.5x7.5mm Cube Magnets

7.5x7.5x7.5mm Cube Magnets

SKU: 44225-7.5
$0.54USD or lower Each
10x2.5x2.5mm Nd Block Magnet

10x2.5x2.5mm Nd Block Magnet

SKU: 44226-2.5
$0.21USD or lower Each
10x5x1mm Nd Rectangle Magnet

10x5x1mm Nd Rectangle Magnet

SKU: 44227-1
$0.28USD or lower Each
10x10x1mm NdFeB Square Magnet

10x10x1mm NdFeB Square Magnet

SKU: 44229-1
$0.35USD or lower Each
10x10x2.5mm Square Magnets

10x10x2.5mm Square Magnets

SKU: 44229-2.5
$0.33USD or lower Each
10x10x5mm Square Magnets

10x10x5mm Square Magnets

SKU: 44229-5
$0.77USD or lower Each
10x10x10mm NdFeB Cube Magnets

10x10x10mm NdFeB Cube Magnets

SKU: 44229-10
$1.51USD or lower Each
12.5x2.5x1mm Block Magnets

12.5x2.5x1mm Block Magnets

SKU: 44230-1
$0.14USD or lower Each
12.5x2.5x2.5mm Nd Block Magnet

12.5x2.5x2.5mm Nd Block Magnet

SKU: 44230-2.5
$0.53USD or lower Each
12.5x5x1mm Block Magnets

12.5x5x1mm Block Magnets

SKU: 44231-1
$0.28USD or lower Each
12.5x5x2.5mm Nd Block Magnet

12.5x5x2.5mm Nd Block Magnet

SKU: 44231-2.5
$0.49USD or lower Each
12.5x12.5x2.5mm Square Magnets

12.5x12.5x2.5mm Square Magnets

SKU: 44234-2.5
$0.85USD or lower Each
12.5x12.5x5mm Square Magnets

12.5x12.5x5mm Square Magnets

SKU: 44234-5
$1.07USD or lower Each
12.5x12.5x12.5mm Cube Magnets

12.5x12.5x12.5mm Cube Magnets

SKU: 44234-12.5
$2.40USD or lower Each
20x10x5mm Block Magnets

20x10x5mm Block Magnets

SKU: 44251-5
$1.31USD or lower Each
25x2.5x2.5mm Nd Block Magnet

25x2.5x2.5mm Nd Block Magnet

SKU: 44256-2.5
$0.44USD or lower Each
25x5x2.5mm NdFeb Slab Magnet

25x5x2.5mm NdFeb Slab Magnet

SKU: 44257-2.5
$0.82USD or lower Each
25x10x2.5mm Block Magnets

25x10x2.5mm Block Magnets

SKU: 44259-2.5
$1.41USD or lower Each
25x10x5mm NdFeB Block Magnet

25x10x5mm NdFeB Block Magnet

SKU: 44259-5
$2.08USD or lower Each
25x12.5x2.5mm Block Nd Magnet

25x12.5x2.5mm Block Nd Magnet

SKU: 44260-2.5
$1.45USD or lower Each
25x12.5x5mm Neo Block Magnet

25x12.5x5mm Neo Block Magnet

SKU: 44260-5
$2.30USD or lower Each
25x25x2.5mm Square Magnets

25x25x2.5mm Square Magnets

SKU: 44265-2.5
$2.86USD or lower Each
25x25x5mm NdFeb Square Magnet

25x25x5mm NdFeb Square Magnet

SKU: 44265-5
$4.64USD or lower Each
25x25x25mm Neo Cube Magnets

25x25x25mm Neo Cube Magnets

SKU: 44265-25
$18.59USD or lower Each
50x5x2.5mm Nd Block Magnet

50x5x2.5mm Nd Block Magnet

SKU: 44402-2.5
$1.16USD or lower Each
More Information

Applications

SKU Size Shape Application
44227-2.5 15x2.5mm Block EDF Jet RC Model
44231-2.5 12.5x5x2.5mm Block Magnetic Necklace
44234-2.5 12.5x12.5x2.5mm Square Magnetic Jewelry-Brooch
44257-2.5 25x5x2.5mm Block 3D-Printed-Kinetic-Charger
44257-2.5 25x5x2.5mm Block Magnetic Pendant
44259-5 25x10x5mm Block 3D Printed Halbach Generator

Custom Magnet Assemblies

Indigo Instruments is partnered with a world class designer & manufacturer of magnets & magnet assemblies. For more information see: Custom Machined Magnet Assemblies & Magnetic Filters.

See the Technical Tab below for General Specifications. .

For detailed specifications on individual magnets, click on their respective images for gauss ratings & pull forces with different air gaps.

Technical
Specifications for Fully Sintered/Pressed
Neodymium Magnets, N42 Grade
Remanent
Flux Density

(Br)
Coercivity
(bHc)
Intrinsic
Coercivity

(jHc)
Max.
Energy Product

(BHMax)
Curie
Temp.

(Tc)
Working
Temp.

(Tw)
Temp.
Coeff.

(αB)r
13,000G; 1300mT 12.0 Oe; 955 A/m 17.0 Oe; 1353 A/m 42 MGO; 334 kJ/m3 310oC 80oC -0.12%/Co

 

Specifications for Fully Sintered/Pressed
Neodymium Magnets, N42 Grade

RemanentFlux Density
(Br)
13,000G; 1300mT
Coercivity
(bHc)
12.0 Oe; 955 A/m
Intrinsic Coercivity
(jHc)
17.0 Oe; 1353 A/m
Max.Energy Product
(BHMax)
42 MGO; 334 kJ/m3
Curie Temperature
(Tc)
310oC
Working Temperature
(Tw)
80oC
Temp.Coefficient
(αB)r
-0.12%/Co

 

  • nickel-copper-nickel coated
  • size tolerance for dimensions <10mm: +/- 0.05mm
  • size tolerance for dimensions >10mm: +/- 0.1mm
  • size tolerance for dimensions >50mm: +/- 0.2mm
  • magnet strength variance piece to piece: ± 5%
  • axis of magnetization is perpendicular to page

 

This table is a summary of pull forces for all block magnets. It assumes complete saturation & no air gap. 

Field Strength (Gauss) & Pull Forces in Pounds & Kilograms at Surface/Centre of Magnet
SKU Size (mm) Gauss Pounds Kilograms
43524 4 × 2 × 1 3723 0.27 0.12
44220-1 2.5 × 2.5 × 1 3786.5 0.2 0.1
44220-2.5 2.5 × 2.5 × 2.5 5666.8 1.0 0.4
44221-1 5 × 2.5 × 1 3192.2 0.36 0.16
44222-1 5 × 5 × 1 2199.2 0.6 0.3
44222-2.5 5 × 5 × 2.5 4333.3 1.5 0.7
44222-5 5 × 5 × 5 5666.8 3.8 1.7
44225-1 7.5 × 7.5 × 1 1516.3 1.0 0.5
44225-2.5 7.5 × 7.5 × 2.5 3335.7 2.6 1.2
44225-5 7.5 × 7.5 × 5 4976.1 5.0 2.3
44225-7.5 7.5 × 7.5 × 7.5 5666.8 8.5 3.9
44226-2.5 10 × 2.5 × 2.5 4870.9 1.16 0.53
44227-1 10 × 5 × 1 1791.7 0.95 0.43
44227-2.5 10 × 5 × 2.5 3723 2.39 1.09
44227-5 10 × 5 × 5 5248.1 4.55 2.07
44229-1 10 × 10 × 1 1151.4 1.4 0.7
44229-2.5 10 × 10 × 2.5 2662.8 3.8 1.7
44229-5 10 × 10 × 5 4333.3 7.9 3.6
44229-10 10 × 10 × 10 5666.8 15.1 6.9
44230-1 12.5 × 2.5 × 1 2900.4 0.69 0.31
44230-2.5 12.5 × 2.5 × 2.5 4800.9 1.72 0.78
44231-1 12.5 × 5 × 1 1725.9 1.09 0.5
44231-2.5 12.5 × 5 × 2.5 3590.7 2.78 1.26
44231-5 12.5 × 5 × 5 5101.1 5.41 2.46
44234-1 12.5 × 12.5 × 1 926.5 1.9 0.9
44234-2.5 12.5 × 12.5 × 2.5 2199.2 5.2 2.3
44234-5 12.5 × 12.5 × 5 3786.5 11.1 5.0
44234-12.5 12.5 × 12.5 × 12.5 5666.8 23.6 10.7
44251-5 20 × 10 × 5 3723 13.2 6.0
44256-2.5 25 × 2.5 × 2.5 4692.6 2.78 1.26
44257-2.5 25 × 5 × 2.5 3380.8 4.46 2.03
44257-5 25 × 5 × 5 4800.9 9.31 4.23
44259-2.5 25 × 10 × 2.5 2105.4 6.88 3.13
44259-5 25 × 10 × 5 3590.7 14.9 6.77
44260-2.5 25 × 12.5 × 2.5 1791.7 7.65 3.48
44260-5 25 × 12.5 × 5 3192.2 17.15 7.8
44265-2.5 25 × 25 × 2.5 1151.4 10.9 5.0
44265-5 25 × 25 × 5 2199.2 25.2 11.4
44265-25 25 × 25 × 25 5666.8 94.5 42.9
44402-2.5 50 × 5 × 2.5 3320.8 6.88 3.13

 

Instructions/Safety
  • Can damage computer gear & credit cards.
  • Handle with care. Magnets can snap together and break skin or a finger or shatter on impact.