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

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

Certifications

Certificates of Compliance available on request.
All magnets made in ISO9002 certified facililty
ROHS & MSDS certificates availalable.

Description More Information Technical Instructions/Safety

Displaying 1 to 18 (of 18 products)

5x2.5x1mm Ring Magnets

SKU: 44600-1

5x2.5x2.5mm NdFeB Ring Magnet

SKU: 44600-2.5

5x2.5x7.5mm Ring Magnets

SKU: 44600-7.5

7.5x2.5x1mm Ring Magnets

SKU: 44601-1

7.5x5x1mm Nd Circular Magnet

SKU: 44602-1

7.5x5x2.5mm Nd Ring Magnet

SKU: 44602-2.5

7.5x5x5mm Nd Circular Magnet

SKU: 44602-5

10x2.5x1mm Ring Magnets

SKU: 44603-1

10x5x2.5mm Neo Donut Magnet

SKU: 44604-2.5

12.5x2.5x5mm Nd Ring Magnet

SKU: 44606-5

12.5x2.5x10mm Ring Magnets

SKU: 44606-10

12.5x5x1mm Nd Thin Ring Magnet

SKU: 44607-1

12.5x5x5mm Ring Magnets

SKU: 44607-5

12.5x7.5x5mm Ring Magnets

SKU: 44608-5

15x5x1mm Nd Thin Washer Magnet

SKU: 44611-1

17.5x5x1mm Nd Flat Ring Magnet

SKU: 44616-1

17.5x5x2.5mm Nd Ring Magnet

SKU: 44616-2.5

25x12.5x2.5mm Nd Ring Magnet

SKU: 44632-2.5

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.