SuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.com
SuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.com
SuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.com
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SuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.comSuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.comSuperMagnetMan Neodymium Ring Magnet. Used as medical magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth neodymium magnets also used as automotive magnets. www.supermagnetman.com

R111045H - Ring Magnet - 12.70mm ID x 6.35mm TH - N45H - Nickel Plated

Thickness 0.250" (6.35mm)
Inside Diameter 0.500" (12.70mm)
Outside Diameter 1.500" (38.10mm)
Grade Neodymium 45H
Max Working Temp 120°C
Coating Nickel
Direction of Magnetism Through thickness
MOQ 1
Price:
$10.80
Stock:
In stock (58 units), ready to be shipped

Additional Resources

Pull Force Calculator

Estimate holding power for your application.

Go to Calculator
Coating Specifications

Compare different coatings for corrosion resistance, and durability to choose the right option for your specific application.

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Material Grades & Curves

Explore Neodymium & Samarium Cobalt magnet material specs and BH curves to ensure proper material selection for your specific application.

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Custom Solutions

SuperMagnetMan is the e-commerce brand of SM Magnetics, here to make it easy to get the magnets you need for prototyping, testing, or small-scale use. When you're ready for a custom solution—whether that’s a fully engineered magnetic system, simulation support, or a complete assembly—our team at SM Magnetics is ready to help you bring it to life.

About the Product

Neodymium ring magnets deliver very high flux in a compact footprint—ideal for prototype assemblies. Common uses include encoders, shaft sensing, and rotor and stator test builds, with additional applications in magnetic couplings and concentric fixtures. The inner and outer-diameter geometry simplifies precise, concentric mounting and hardware pass-through, while axial magnetization creates a clean annular field that works well with Hall and reed sensors. Select grade and magnetization to meet field strength and temperature margin requirements (standard grades operate around 80–100 °C, with high-temperature variants available). Choose coatings to match the environment, then confirm holding force with the pull-force calculator and review material data and tolerances before moving to production.

Customer Reviews

Based on 3 reviews
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M
Michelle Lynch
Magnet broke

Hi, one of the magnets broke when we were trying to pry them apart.

Hi Michelle,

I am so sorry to hear you had some magnets break on you. The product part number, R111045H, is made of neodymium which will break upon impact if the magnets are not handled properly as they enter the magnetic field of another magnet or its own field gets close enough to another magnet or metal surface. This ring specifically is also quite large so its field is bigger and, depending on the application, can have approximately a 35lb pull force which is quite strong if this catches someone by surprise. The proper precautions should be taken when handling these. If you have further concerns or questions about the damage you’ve experienced, please send them to our Operations Department at orders@supermagnetman.com and we will be happy to discuss this further.

Thanks,
SM Magnetics Team

M
Mike Pendleton
Never received

Have yet to receive order

Hey Mike,

Thank you for your business. We are sorry to hear that you never received your order! This is the first time we have actually heard from you about your order. No worries we will get you taken care of quickly! I have passed this issue over to our Shipping Department so they can file a claim. You should hear from them soon! Please let us know if you need any further assistance.

Again, we apologize for any inconvenience!

Kelley Cameron
Marketing Manager

S
Steve Ferguson
Amazingly strong magnets

I got two sets of 6. Unfortunately I got them too close to each other and they bit me! Took a small chunk out of my finger and then it took two people with pliers to pry them apart when they were stuck together without the gasket in between. Ouch. In the care and feeding of your magnets, keep them away from each other!

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