25x10mm Neodymium Disc Magnet

SKU: 44209-10

$9.24USD or lower Each

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[5]   4 Reviews    | Write a Review

The 25x10mm (2.5cm x 1cm) neodymium disc magnet is one of our most powerful and super strong magnet & can work with axial flux generators. Want to demonstrate eddy current braking? Drop this magnet down a 1" diameter copper or aluminum pipe & be amazed.

Safe shopping for best bang for the buck? Here's what some of our customers have to say about us.

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...

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....

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....I couldn't be happier...

We have sold NdFeB magnets since 1996 and have offered N42 grade since 2003, the best value for strength vs cost then & now. Don't be fooled by claims of higher strength, N52, at lower cost:
"...(Indigo) N42 Neodymium magnets...the real deal…bought magnets on Amazon advertised as N52… another cheap Chinese fake". Read the complete review.
Details Specs Reviews Related Products
Details

The Mark I Magnaprobe can respond to as little as 0.3 gauss & will detect weaknesses in magnetic shielding. The Mark II Magnaprobe is a fast & convenient way to confirm magnet are positioned with their poles pointing correctly.

Specifications
Field Strength (Gauss) & Pull Force in Pounds & Kilograms at 5 Distances Above Magnet
SKU: 44209-10      Size:  25 × 10mm
Distance (mm): 0 0.1 1 10 100
Gauss 4123.0 4095.2 3833.8 1473.8 8.8
Lb 37.84 37.33 32.72 4.84 0.00
Kg 17.20 16.97 14.87 2.20 0.00

 

Magnet Documentation
Drawing Compliance MSDS ROHS Graph
Magnet Technical Diagram Certificate of Compliance MSDS ROHS N42 Graph


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


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%


American (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


Here's what 3 happy customers said about us on our Google Page:


...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....Read more of what Tracy Myerson had to say.

I've dealt with Indigo Instruments for years now....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....Read more of what Ian Kelly had to say.

Been doing business with Indigo for many years. Their Neodymium magnets are superb in quality and price....Read more of what Peter Maran had to say.
 
Reviews (4)
2021-01-26
Really can't say enough about Indigo Instruments! Shipping is fast, customer service is consistently great and the product is awesome. Thanks folks!
— Origin Goods
2020-12-16
Unbeatable price and selection. Great customer service and fast shipping.
— Marc
— Indigo: Thank you for kind words.
2018-09-19
These magnets were stronger by far than I had imagined. I bought 4 and 3 inadvertently got stuck together: no one has been able to separate them--kid you not. Big, strong guys cannot get them apart. If you need to lift an elephant, get one of these; if you need to lift a tank you'd better get three just to be sure :). Delivered quite quickly and well packaged so as not to interfere with air traffic navigational equipment...
— freebie
2018-01-10
Product exactly as described. Shipping was great and is second time I ordered through Indigo and won't be my last. Highly recommend!
— Chris
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