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🧲 Power your projects with precision and strength—don’t get left behind in the magnet revolution!
This 8-pack of N42H grade NdFeB arc segment magnets features diametrical magnetization with poles arranged for optimal motor and generator efficiency. Coated with a durable Ni+Cu+Ni triple layer, these 36mm diameter by 20mm high magnets resist corrosion and maintain magnetic strength up to 120°C, making them perfect for high-performance wind turbine rotors and custom motor builds.
| ASIN | B07N831KGG |
| Best Sellers Rank | #246,488 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #854 in Rare Earth Magnets |
| Brand | Magerial |
| Brand Name | Magerial |
| Color | Steel Color |
| Customer Reviews | 4.4 out of 5 stars 173 Reviews |
| Included Components | NeodymiumIronBoron Alloy |
| Item Dimensions L x W x Thickness | 1.1"W |
| Item Thickness | 20 millimeters |
| Item Weight | 0.27 g |
| Manufacturer | HMME |
| Material | Copper |
| Material Type | Copper |
| Model Number | ArcMagnets |
| Number of Pieces | 8 |
| Part Number | ArcMagnets |
| Product Dimensions | 1.1"W |
| Shape | Round |
| UPC | 754525931225 |
| Unit Count | 8 Count |
D**Z
NOT SHIPPED AS SHOWN, TRICKY TO PUT TOGETHER
~ These magnets are super strong & don't come assembled in a cylindrical form as shown. They are flat on top of each other separated by plastic. ~ Take care with handling them since they can easily snap pinch your fingers if not careful. ~ It is tricky to put them together if you don't have a separator in between that fits the cylindrical hollow space in-between the magnets. So find a tube that fits then assemble the magnets around it. ~ The other tricky part is getting the correct polarities aligned so the magnets stick together.
C**S
Great quality and measurement accuracy
Used this in a 3d printed generator/motor build that I was testing out. the measurements were accurate enough that I had the build printed before it arrived. These magnets slid right in very snugly and smoothly, so the machining on these are spot on with the description. Very happy with this buy!
J**J
strong
I got these to use on car oil filters, their curvature fit the round filter body perfectly. Yes it really does work and traps the very fine metal particles that pass through the filter media. I highly suggest using these + a magnetic tipped oil drain plug on any engine with a timing chain, oil operated vvt cam gears, solenoids in the oil system, or push rods. Over the last year I have cut open several filters at 4k mileage oil changes and found very fine metal dust captured, the particle size so fine/small you can not feel it. A large % would easily pass through even the best quality filters media.
N**O
Muy buena potencia
Muy buenos pero hay que manejarlos con sumo cuidado. Se me partió uno al pegarse bruscamente con el otro
A**.
Smaller than I pictured
When I ordered I should have taken a measuring tape and actually measured. Got the part and it was smaller than u pictured in my head, but it works great and it's a strong magnet.
P**E
Wow 😳
Soooo strong! Love putting them into different configurations. Be careful, one wrong move and it will collapse, snaping down to its natural gripping cluster⚡️ It'll startle you but then still put a smile on your face. Even after a few snap implosions, there's no chips or cracks. You'll need stroooong fingers to get it back apart. Have fun!!
D**O
Good items
It arrived on time and it was I need, perfect
R**D
Awesome and crazy strong! perfect for all sorts of fun engineering.
Good and strong magnets with sensible field construction Edit: Price recently increased significantly. Droped from 5 star to 3
Trustpilot
3 weeks ago
2 weeks ago