Neodymium Disc & Rod Magnets

High tolerance neodymium rare earth disc & rod magnets, N42 grade

Guaranteed tolerances for repeatability with exceptional pricing.

Neodymium Disc & Rod Magnets

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 facililty
  3. ROHS & MSDS certificates availalable.
Description More Information Technical Instructions/Safety
Displaying 1 to 44 (of 44 products)
2.5x1mm Neodymium Disc Magnet

2.5x1mm Neodymium Disc Magnet
SKU: 44200-1
$0.14USD or lower Each
2.5x2.5mm Rod Magnets

2.5x2.5mm Rod Magnets
SKU: 44200-2.5
$0.24USD or lower Each
2.5x5mm Rare Earth Rod Magnet

2.5x5mm Rare Earth Rod Magnet
SKU: 44200-5
$0.27USD or lower Each
2.5x7.5mm Rod Magnets

2.5x7.5mm Rod Magnets
SKU: 44200-7.5
$0.31USD or lower Each
2.5x10mm NdFeb Cylinder Magnet

2.5x10mm NdFeb Cylinder Magnet
SKU: 44200-10
$0.59USD or lower Each
2.5x12.5mm Rod Magnets

2.5x12.5mm Rod Magnets
SKU: 44200-12.5
$0.63USD or lower Each
3x1mm Neodymium Disc Magnet

3x1mm Neodymium Disc Magnet
SKU: 43511
$0.14USD or lower Each
4x1.5mm Disc Magnets

4x1.5mm Disc Magnets
SKU: 43512
$0.19USD or lower Each
5x1mm Neodymium Disc Magnet

5x1mm Neodymium Disc Magnet
SKU: 44201-1
$0.22USD or lower Each
5x2.5mm Neodymium Disc Magnet

5x2.5mm Neodymium Disc Magnet
SKU: 44201-2.5
$0.43USD or lower Each
5x5mm Rod Magnets

5x5mm Rod Magnets
SKU: 44201-5
$0.82USD or lower Each
5x7.5mm Neodymium Rod Magnet

5x7.5mm Neodymium Rod Magnet
SKU: 44201-7.5
$0.94USD or lower Each
5x10mm Neodymium Rod Magnet

5x10mm Neodymium Rod Magnet
SKU: 44201-10
$0.84USD or lower Each
5x12.5mm Cylinder Magnet

5x12.5mm Cylinder Magnet
SKU: 44201-12.5
$1.11USD or lower Each
7.5x1mm Thin Nd Disc Magnet

7.5x1mm Thin Nd Disc Magnet
SKU: 44202-1
$0.30USD or lower Each
7.5x2.5mm Disc Magnets

7.5x2.5mm Disc Magnets
SKU: 44202-2.5
$0.53USD or lower Each
7.5x5mm Disc Magnets

7.5x5mm Disc Magnets
SKU: 44202-5
$0.71USD or lower Each
7.5x7.5mm Rod Magnets

7.5x7.5mm Rod Magnets
SKU: 44202-7.5
$0.81USD or lower Each
7.5x25mm Rare Earth Rod Magnet

7.5x25mm Rare Earth Rod Magnet
SKU: 44202-25
$1.65USD or lower Each
10x1mm Neodymium Disc Magnet

10x1mm Neodymium Disc Magnet
SKU: 44203-1
$0.45USD or lower Each
10x2.5mm NdFeb Disc Magnet

10x2.5mm NdFeb Disc Magnet
SKU: 44203-2.5
$0.93USD or lower Each
10x5mm Neodymium Disc Magnet

10x5mm Neodymium Disc Magnet
SKU: 44203-5
$1.60USD or lower Each
10x7.5mm Neodymium Disc Magnet

10x7.5mm Neodymium Disc Magnet
SKU: 44203-7.5
$1.47USD or lower Each
10x10mm Neodymium Rod Magnet

10x10mm Neodymium Rod Magnet
SKU: 44203-10
$1.76USD or lower Each
10x12.5mm Neodymium Rod Magnet

10x12.5mm Neodymium Rod Magnet
SKU: 44203-12.5
$2.08USD or lower Each
10x15mm Nd Cylinder Magnet

10x15mm Nd Cylinder Magnet
SKU: 44203-15
$2.53USD or lower Each
10x25mm Nd Cylinder Magnet

10x25mm Nd Cylinder Magnet
SKU: 44203-25
$3.47USD or lower Each
12.5x1mm Thin Nd Disc Magnet

12.5x1mm Thin Nd Disc Magnet
SKU: 44204-1
$0.42USD or lower Each
12.5x2.5mm Disc Magnets

12.5x2.5mm Disc Magnets
SKU: 44204-2.5
$1.29USD or lower Each
12.5x5mm Disc Magnets

12.5x5mm Disc Magnets
SKU: 44204-5
$2.34USD or lower Each
12.5x7.5mm Disc Magnets

12.5x7.5mm Disc Magnets
SKU: 44204-7.5
$2.30USD or lower Each
12.5x10mm NdFeb Disc Magnet

12.5x10mm NdFeb Disc Magnet
SKU: 44204-10
$2.47USD or lower Each
12.5x12.5mm Rod Magnets

12.5x12.5mm Rod Magnets
SKU: 44204-12.5
$3.19USD or lower Each
12.5x25mm Rod Magnets

12.5x25mm Rod Magnets
SKU: 44204-25
$3.55USD or lower Each
15x1mm Thin Nd Disc Magnet

15x1mm Thin Nd Disc Magnet
SKU: 44205-1
$0.82USD or lower Each
15x2.5mm Neodymium Disc Magnet

15x2.5mm Neodymium Disc Magnet
SKU: 44205-2.5
$1.35USD or lower Each
15x5mm Neodymium Disk Magnet

15x5mm Neodymium Disk Magnet
SKU: 44205-5
$2.44USD or lower Each
15x25mm NdFeB Cylinder Magnet

15x25mm NdFeB Cylinder Magnet
SKU: 44205-25
$6.16USD or lower Each
20x5mm Neodymium Disk Magnet

20x5mm Neodymium Disk Magnet
SKU: 44207-5
$3.22USD or lower Each
20x20mm Neodymium Rod Magnet

20x20mm Neodymium Rod Magnet
SKU: 44207-20
$9.50USD or lower Each
25x2.5mm Strong Nd Disk Magnet

25x2.5mm Strong Nd Disk Magnet
SKU: 44209-2.5
$2.96USD or lower Each
25x5mm Disc Magnets

25x5mm Disc Magnets
SKU: 44209-5
$6.25USD or lower Each
25x10mm Neodymium Disc Magnet

25x10mm Neodymium Disc Magnet
SKU: 44209-10
$9.24USD or lower Each
25x20mm Rare Earth Disk Magnet

25x20mm Rare Earth Disk Magnet
SKU: 44209-20
$15.38USD or lower Each
More Information

What Customers Say About our Neodymium Magnets

[Actual reviews done on Google Places]

Roman Teliszczuk: Purchased neodymium magnets for work. The quality, price, packaging and delivery were excellent. I highly recommend Indigo Instruments.

Mark Elliott: Great website especially the dimensional and polarity information. Magnets arrived quickly and were as expected. Used to replace weak door alarm sensor magnets.

Ron Bennett: Fantastic support and product. Beats Amazon price with real customer service. After online order was placed, they called and and asked if I had any questions and gave clear instructions on pickup process. Order was ready and in stock and the product was of the highest quality and exactly as described. Will buy other items from Indigo instruments.

Ian Kelly: I've dealt with Indigo Instruments for years now. They have always been personable and very knowledgeable. Most recently I sent them a hand-drawn sketch of my interpretation of something I saw on YouTube and wanted recommendations on what magnets to use. Chris called me up, discussed the project and made some recommendations. His recommendation was bang on. I couldn't be happier with the end product.

Tracy Myerson: Super fast shipping, excellent prices, and great quality product! I purchased N42 Neodymium magnets, they are the real deal. I had previously bought magnets on Amazon that were advertised as N52, they were just another cheap Chinese fake. These folks sell authentic, high quality stuff and get it to you fast. Highly recommended!

Brenda McIntyre: love these guys, high quality, quick service and reasonable pricing!!

Peter Maran: Been doing business with Indigo for many years. Their Neodymium magnets are superb in quality and price. Other items, tools, magnifiers, tweezers, and so on, all quality made withstanding the test of time.

Applications

SKU Size Shape Application
44201-2.5 5x2.5mm Disc 3D Printed Business Card Holder
44201-2.5 5x2.5mm Disc Magnetic Scanning Targets
44203-1 10x1mm Disc Wall Art-Insurance Company
44205-2.5 15x2.5mm Disc Wall Art-Dental Office

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.

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

 

  • magnetized through the thickness
  • nickel-copper-nickel coated
  • size tolerance for dimensions <10mm: ± 0.05mm
  • size tolerance for dimensions >10mm: ± 0.1mm
  • magnet strength variance piece to piece: ± 5%

 

This table lists the pull forces for all our disc magnets. It assumes complete saturation & no air gap. See individual magnets for values with different gaps.

Field Strength (Gauss) & Pull Forces in Pounds & Kilograms at Surface/Centre of Magnet
SKU Size (mm) Gauss Pounds Kilograms
43511 3 × 1 3661 0.24 0.11
43512 4 × 1.5 3960 0.57 0.26
44200-1 2.5 × 1 4123 0.18 0.08
44200-2.5 2.5 × 2.5 5903.2 0.4 0.18
44200-5 2.5 × 5 6402.9 0.51 0.23
44200-7.5 2.5 × 7.5 6510.2 0.56 0.25
44200-10 2.5 × 10 6549 0.58 0.26
44200-12.5 2.5 × 12.5 6567.2 0.6 0.27
44201-1 5 × 1 2451.2 0.49 0.22
44201-2.5 5 × 2.5 4666.9 1.29 0.59
44201-5 5 × 5 5903.2 2.04 0.93
44201-7.5 5 × 7.5 6261.3 2.2 1.0
44201-10 5 × 10 6402.9 2.26 1.03
44201-12.5 5 × 12.5 6471.8 2.36 1.07
44201-15 5 × 15 6510.2 2.41 1.1
44202-1 7.5 × 1 1700.6 0.87 0.4
44202-2.5 7.5 × 2.5 3661 2.2 1.0
44202-5 7.5 × 5 5280 4.11 1.87
44202-7.5 7.5 × 7.5 5903.2 4.82 2.19
44202-10 7.5 × 10 6179.8 5.22 2.37
44202-12.5 7.5 × 12.5 6321.7 5.52 2.51
44202-15 7.5 × 15 6402.9 5.62 2.55
44202-25 7.5 × 25 6527 5.92 2.69
44203-1 10 × 1 1294.4 1.25 0.57
44203-2.5 10 × 2.5 2951.6 3.24 1.47
44203-5 10 × 5 4666.9 6.48 2.95
44203-7.5 10 × 7.5 5491.5 7.94 3.61
44203-10 10 × 10 5903.2 8.87 4.03
44203-12.5 10 × 12.5 6127.9 9.37 4.26
44203-15 10 × 15 6261.3 9.54 4.34
44203-25 10 × 25 6471.8 10.19 4.63
44204-1 12.5 × 1 1042.7 1.63 0.74
44204-2.5 12.5 × 2.5 2451.2 4.41 2.0
44204-5 12.5 × 5 4123 9.18 4.17
44204-7.5 12.5 × 7.5 5070.3 11.52 5.24
44204-10 12.5 × 10 5596.8 13.25 6.02
44204-25 12.5 × 25 6402.9 16.06 7.3
44205-1 15 × 1 872.3 2.01 0.91
44205-2.5 15 × 2.5 2087.1 5.59 2.54
44205-5 15 × 5 3661 12.1 5.5
44205-7.5 15 × 7.5 4666.9 15.44 7.02
44205-10 15 × 10 5280 18.21 8.28
44205-12.5 15 × 12.5 5659.5 20.24 9.2
44205-25 15 × 25 6321.7 23.9 10.86
44206-1 17.5 × 1 749.4 2.38 1.08
44207-2.5 20 × 2.5 1600.7 7.67 3.49
44207-5 20 × 5 2951.6 17.22 7.83
44207-20 20 × 20 5903.2 36.26 16.48
44209-2.5 25 × 2.5 1294.4 10.01 4.55
44209-5 25 × 5 2451.2 22.77 10.35
44209-10 25 × 10 4123 37.84 17.2
44209-20 25 × 20 5596.8 54.58 24.81


Imperial/Metric Conversion Table

Inch Decimal mm Rounded
1/32" 0.031 0.8 1
3/32" 0.094 2.4 2.5
5/32" 0.156 4.0 4
1/16" 0.063 1.6 1.5
3/16" 0.188 4.8 5
2/10" 0.200 5.1 5
1/8" 0.125 3.2 3.75
1/4" 0.250 6.4 7.5
5/16" 0.313 7.9 7.5
3/8" 0.375 9.5 10
13/32" 0.406 10.3 10
1/2" 0.500 12.7 12.5
9/16" 0.563 14.3 15
5/8" 0.625 15.9 15
11/16" 0.688 17.5 17.5
3/4" 0.750 19.1 20
13/16" 0.813 20.6 20
7/8" 0.875 22.2 22.5
15/16" 0.938 23.8 25

 

Tolerances Sintered Rare Earth Magnets
 
  Dimensions Tolerances

Size:
Unfinished Surfaces:
Dimensions perpendicular to pressing (die formed)

 Inches mm Inches mm
0 to 0.125 0 to 3 +/- 0.006 +/- 0.15
0.126 to 0.625 3 to 16 +/- 0.012 +/- 0.30
0.626 to 0.875 16 to 22 +/- 0.018 +/- 0.45
0.876 and Up 22 and Up +/- 2.5% +/- 2.5%

 

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.