Neodymium Disc & Rod Magnets

N42 Nd Disc & Rod Magnets

Magnets Strengths & Tolerances

Guaranteed & Documented

Neodymium Disc, Rod, Cylinder Magnets

Neodymium rare earth disc & rod magnets, N42 grade, 13,200 gauss.

Guaranteed tolerances for size & strength repeatability.

"Hard" metric: diameter & thickness in 2.5mm increments to simply prototyping process.

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 a strength variation of +/- 5% between magnets is met both within batches & from batch to batch. They are ideal short run prototype magnets for use in sensors, switches or latches & will work reliably & according to design.

All our NIB magnets are rated for maximum performance up to 80C. Higher operating temperature versions (N42H, N42SH) are available as custom orders. All our small disc magnets come with a guaranteed maximum energy product of 13,200 gauss.

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.What Just A Few of Our Customers Have to Say

What Just 2 Customers Have to Say

  1. Fantastic support and product. Beats Amazon price with real customer service....Click on Ron Bennett to see full Google Review.
  2. Super fast shipping, excellent prices, and great quality product! I purchased N42 Neodymium magnets, they are the real deal. ....bought magnets on Amazon...advertised as N52, ...another cheap Chinese fake. These folks sell authentic, high quality stuff.... Click on Tracy Myerson to see full Google Review.
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
$0.18USD 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
$1.05USD or lower Each
2.5x12.5mm Rod Magnets

2.5x12.5mm Rod Magnets

SKU: 44200-12.5
$0.63USD or lower Each
2.5mm Diameter Nd Magnet Bundle

2.5mm Diameter Nd Magnet Bundle

SKU: 44200-PB
$13.95USD Each
3x1mm Neodymium Disc Magnet

3x1mm Neodymium Disc Magnet

SKU: 43511
$0.17USD or lower Each
4x1.5mm Disc Magnets

4x1.5mm Disc Magnets

SKU: 43512
$0.17USD or lower Each
5x1mm Neodymium Disc Magnet

5x1mm Neodymium Disc Magnet

SKU: 44201-1
$0.17USD or lower Each
5x2.5mm Neodymium Disc Magnet

5x2.5mm Neodymium Disc Magnet

SKU: 44201-2.5
$0.53USD or lower Each
5x5mm Rod Magnets

5x5mm Rod Magnets

SKU: 44201-5
$1.02USD 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
$1.41USD or lower Each
5mm Diameter Nd Magnet Bundle

5mm Diameter Nd Magnet Bundle

SKU: 44201-PB
$24.50USD 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
$0.58USD or lower Each
7.5x5mm Disc Magnets

7.5x5mm Disc Magnets

SKU: 44202-5
$0.86USD or lower Each
7.5x7.5mm Rod Magnets

7.5x7.5mm Rod Magnets

SKU: 44202-7.5
$0.81USD or lower Each
7.5x10mm Rod Magnets

7.5x10mm Rod Magnets

SKU: 44202-10
$2.73USD or lower Each
7.5x25mm Rare Earth Rod Magnet

7.5x25mm Rare Earth Rod Magnet

SKU: 44202-25
$1.65USD or lower Each
7.5mm Diameter Nd Magnet Bundle

7.5mm Diameter Nd Magnet Bundle

SKU: 44202-PB
$37.95USD Each
10x1mm Neodymium Disc Magnet

10x1mm Neodymium Disc Magnet

SKU: 44203-1
$0.42USD or lower Each
10x2.5mm NdFeb Disc Magnet

10x2.5mm NdFeb Disc Magnet

SKU: 44203-2.5
$0.61USD or lower Each
10x5mm Neodymium Disc Magnet

10x5mm Neodymium Disc Magnet

SKU: 44203-5
$1.30USD 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
$1.88USD or lower Each
10x15mm Nd Cylinder Magnet

10x15mm Nd Cylinder Magnet

SKU: 44203-15
$3.65USD or lower Each
10x25mm Nd Cylinder Magnet

10x25mm Nd Cylinder Magnet

SKU: 44203-25
$3.47USD or lower Each
12.5x2.5mm Disc Magnets

12.5x2.5mm Disc Magnets

SKU: 44204-2.5
$1.18USD or lower Each
12.5x5mm Disc Magnets

12.5x5mm Disc Magnets

SKU: 44204-5
$1.97USD or lower Each
12.5x10mm NdFeb Disc Magnet

12.5x10mm NdFeb Disc Magnet

SKU: 44204-10
$2.53USD or lower Each
12.5x12.5mm Rod Magnets

12.5x12.5mm Rod Magnets

SKU: 44204-12.5
$3.29USD 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
$0.79USD or lower Each
15x2.5mm Neodymium Disc Magnet

15x2.5mm Neodymium Disc Magnet

SKU: 44205-2.5
$1.84USD or lower Each
15x5mm Neodymium Disk Magnet

15x5mm Neodymium Disk Magnet

SKU: 44205-5
$1.91USD or lower Each
20x20mm Neodymium Rod Magnet

20x20mm Neodymium Rod Magnet

SKU: 44207-20
$9.50USD or lower Each
20x5mm Neodymium Disk Magnet

20x5mm Neodymium Disk Magnet

SKU: 44207-5
$4.59USD 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
$6.45USD 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 More Customers Say About our Indigo 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.

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.

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
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
44202-25 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
44205-25 15 × 25 6321.7 23.9 10.86
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.