Neodymium Ring Magnets

High tolerance neodymium rare earth ring magnets, N42 grade

Guaranteed tolerances for repeatability with exceptional pricing.

Neodymium Ring and Annular 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.
Displaying 1 to 18 (of 18 products)
5x2.5x1mm Ring Magnets

5x2.5x1mm Ring Magnets

SKU: 44600-1
$0.15USD or lower Each
5x2.5x2.5mm NdFeB Ring Magnet

5x2.5x2.5mm NdFeB Ring Magnet

SKU: 44600-2.5
$0.20USD or lower Each
5x2.5x7.5mm Ring Magnets

5x2.5x7.5mm Ring Magnets

SKU: 44600-7.5
$0.22USD Each
7.5x2.5x1mm Ring Magnets

7.5x2.5x1mm Ring Magnets

SKU: 44601-1
$0.26USD or lower Each
7.5x5x1mm Nd Circular Magnet

7.5x5x1mm Nd Circular Magnet

SKU: 44602-1
$0.20USD or lower Each
7.5x5x2.5mm Nd Ring Magnet

7.5x5x2.5mm Nd Ring Magnet

SKU: 44602-2.5
$0.37USD or lower Each
7.5x5x5mm Nd Circular Magnet

7.5x5x5mm Nd Circular Magnet

SKU: 44602-5
$0.53USD or lower Each
10x2.5x1mm Ring Magnets

10x2.5x1mm Ring Magnets

SKU: 44603-1
$0.18USD or lower Each
10x5x2.5mm Neo Donut Magnet

10x5x2.5mm Neo Donut Magnet

SKU: 44604-2.5
$0.35USD or lower Each
12.5x2.5x5mm Nd Ring Magnet

12.5x2.5x5mm Nd Ring Magnet

SKU: 44606-5
$1.95USD or lower Each
12.5x2.5x10mm Ring Magnets

12.5x2.5x10mm Ring Magnets

SKU: 44606-10
$0.66USD Each
12.5x5x1mm Nd Thin Ring Magnet

12.5x5x1mm Nd Thin Ring Magnet

SKU: 44607-1
$0.30USD or lower Each
12.5x5x5mm Ring Magnets

12.5x5x5mm Ring Magnets

SKU: 44607-5
$2.47USD or lower Each
12.5x7.5x5mm Ring Magnets

12.5x7.5x5mm Ring Magnets

SKU: 44608-5
$0.95USD or lower Each
15x5x1mm Nd Thin Washer Magnet

15x5x1mm Nd Thin Washer Magnet

SKU: 44611-1
$0.70USD or lower Each
17.5x5x1mm Nd Flat Ring Magnet

17.5x5x1mm Nd Flat Ring Magnet

SKU: 44616-1
$0.90USD or lower Each
17.5x5x2.5mm Nd Ring Magnet

17.5x5x2.5mm Nd Ring Magnet

SKU: 44616-2.5
$0.90USD or lower Each
25x12.5x2.5mm Nd Ring Magnet

25x12.5x2.5mm Nd Ring Magnet

SKU: 44632-2.5
$1.75USD 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
44607-2.5 D12.5xd5x2.5mm Ring Reed Switch Motor
44608-5 D12.5xd7.5x5mm Ring Pocket Screwdriver

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
  • N42 grade: ~13,000 gauss (1.3T)
  • nickel-copper-nickel coated
  • size tolerance for dimensions <10mm: +/- 0.05mm
  • size tolerance for dimensions >10mm: +/- 0.1mm
  • magnet strength variance piece to piece: <8%
  • 80C maximum operating temperature
     
Holding Force in Pounds & Kilograms
Part Number (SKU) Size (mm) Pounds Kilograms
44600-1 5x2.5 x 1 0.38 0.17
44600-2.5 5 x 2.5 x 2.5 1.03 0.47
44600-5 5 x 2.5 x 5 1.6 0.73
44600-7.5 5 x 2.5 x 7.5 1.67 0.76
44600-10 5 x 2.5 x 10 1.68 0.76
44601-1 7.5 x 2.5 x 1 0.80 0.36
44601-2.5 7.5 x 2.5 x 2.5 2.02 0.92
44601-5 7.5 x 2.5 x 5 3.7 1.68
44602-1 7.5 x 5 x 1 0.58 0.26
44602-2.5 7.5 x 5 x 2.5 1.48 0.67
44602-5 7.5 x 5 x 5 2.47 1.12
44603-1 10 x 2.5 x 1 1.2 0.55
44603-2.5 10 x 2.5 x 2.5 3.1 1.41
44603-5 10 xI 5 x 5   6.14 2.79
44604-1 10 x 5 x 1 1.05 0.48
44604-2.5 10 x 5 x 2.5 2.67 1.21
44604-5 10 x 5 x 5 5.17 2.35
44604-10 10 x 5 x 10 6.83 3.10
44606-1 12.5 x 2.5 x 1 1.59 0.72
44606-2.5 12.5 x 2.5 x 2.5 4.29 1.95
44606-5 12.5 x 2.5 x 5 8.91 4.05
44606-10 12.5 x 2.5 x 10 12.80 5.82
44607-1 12.5 x 5 x 1 1.47 0.67
44607-2.5 12.5 x 5 x 2.5 3.92 1.78
44607-5 12.5 x 5 x 5 8.05 3.66
44608-1 12.5 x 7.5 x 1 1.25 0.57
44608-2.5 12.5 x 7.5 x 2.5 3.24 1.47
44608-5 12.5 x 7.5 x 5 6.48 2.95
44611-1 15 x 5 x 1 1.88 0.85
44616-1 17.5 x 5 x 1 2.27 1.03
44616-2.5 17.5 x 5 x 2.5 6.4 2.91
44632-2.5 25 x 12.5 x 2.5 8.09 3.68

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.