E-mail: [email protected]

Ring Magnets - Magnets with Thru Hole, Hollow Magnets

Manufacture Capacity and Product Details

Composite:Nd(Dy, Tb), Fe, B, Pr, Al, Cu etc.Chemical Formula:Nd2Fe14B
Lead Time:7-25 days depending on quantityTolerance:±0.05mm
Grade:N, M, H, SH, UH, EH, AHDensity:7.4-7.65 g/cm³
Surface Treatment:Zn, Ni, NiCuNi, Cr, Epoxy, Ag, Au etc.Default Fillet:r=0.2-0.5mm
Working Temperature:80℃-240℃ depending on different gradesCertifications:RoHS, SGS, REACH, MSDS
MOQ:≥1 pieceCountry of Origin:China
Customization:Shape, Package, LogoBrand Name:Uwandy Magnets

Payment & Service



100% in advance

PayPal, T/T, WU


100% in advance

T/T, WU, D/P


50% deposit in advance,  balance before shipment

T/T, WU, D/P


30% deposit in advance, 50% before shipment, 20% balance to be negotiated

T/T, D/P, L/C

More better payment tems can be offered for regular customers


1. We provide CAD drawing service for your order

2. We can offer suggestions on grade selection or better solutions for your project

3. We can offer free samples(value less than $50) to regular customers

Safety Warning

Neodymium magnets are brittle, super strong, easily shattered and broken, Here are some tips that will help when working with neodymium magnets:

1. Wear eye protection and gloves when working with magnets if necessary.

2. Slide the magnets rather than pulling off the stack.

3. Keep away magnets from kids in case accident happens.

4. Keep away magnets from objects that might cause damage like smartphone, GPS, pacemaker or other electronic devices.

5. Do not put magnets in high temperature environment, magnets will demagnetize while they are over heated.

6. Magnets can rust and get scratched because magnets contain iron and mostly are nickel plated.

Packing & Shipping

General Packing

1.Clear plastic bag→Small white box→Foam padding carton(36x24x16cm)

2. We will insert at least 6 pieces of steel sheets to block magnetic field for air transport

Shipping Method

Express, Air, Sea, Train, Truckload

Shipment Terms




Ring Magnets

The manufacturing of ring magnets is not a complex process. Ring magnets are created by drilling holes in the circular faces of disc or cylindrical magnets. Neodymium magnets can be easily machined with simple processes, such as drilling, chamfering, and cutting.

Ring Magnets 1
Magnets with Thru Hole 2
Hollow Magnets 1

What are Common applications of ring magnets?

Ring magnets have numerous applications. In the audio industry, they are used in tweeters and speakers. In the motor industry, they find applications in coreless motors. Ring magnets used in the motor industry typically require radially magnetized magnets. Additionally, there are other uses.

EarPods module
EarPods Module
Speaker Module
Speaker Module
coreless motor module
Coreless Motor Module

How are the neodymium ring magnet made?

After cutting neodymium cylinder magnet material to the required thickness, it is placed on a bench drill press. Following proper positioning and drilling, it is crafted into a neodymium ring magnet. Once the holes are drilled, the neodymium magnets go through tolerance selection, electroplating, and magnetization, ultimately becoming the final product.

neodymium ring magnet drilling
neodymium ring magnets manufacture

What is the maximum size of the ring magnets that Uwandy can produce?

Uwandy is capable of producing ring magnets with diameters ranging from 3 to 120mm. Depending on the magnetization direction, the thickness generally does not exceed 40mm. The minimum tolerance can be as tight as ±0.03mm, while for larger magnets, tolerances may vary between ±0.1mm to ±1mm due to the influence of thermal expansion and contraction.

Outer Diameter(mm)Inner Diameter(mm)Height(mm)

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Rated 4.0 out of 5
October 2, 2023

powerful neodymium magnet!

Raymond Jones
Rated 5.0 out of 5
October 2, 2023

Strong disc magnets!

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