Diametrically NdFeB Magnet Ring Dia. 5.4x2.3x3.9 mm Tube N52 Precision Rotor Neodymium Permanent Sensor Magnets 100-1000pcs

Diametrically NdFeB Magnet Ring Dia. 5.4x2.3x3.9 mm Tube N52 Precision Rotor Neodymium Permanent Sensor Magnets 100-1000pcs

Diametrically NdFeB Magnet Ring Dia. 5.4x2.3x3.9 mm Tube N52 Precision Rotor Neodymium Permanent Sensor Magnets 100-1000pcs

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  • Your PriceUS $35.98piece
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Specifications(1"=25.4mm; 1lbs=0.453kg)

  • Dimensions: OD5.40 x ID2.30 x Thick 3.90 mm (Outer Diameter*Inner Diameter*Thickness)
  • Tolerances: +/-0.05mm
  • Material: NdFeB, Grade N52
  • Plating/Coating: NiCuNi
  • Magnetization Direction: Diametrically Magnetized
  • Max Operating Temp: 176ºF (80ºC)
  • BHmax: 52 MGOe
  • Brand: HMME
  • Other: All magnets passed QC(Br. Flux.Dimensions) and 24-Hour Salt Spray Test

Production Details

Magnetizing and Poles

For more efficient use of the magnets, most of them are magnetized with poles on the largest faces. However, special magnetizing are always there in our applications.

1. Axially Magnetized: with poles on the flat faces. Mostly used for round discs, cylinders, rings

2. Through Thickness: with poles on the two largest faces. Mostly used for blocks, and magnetized through the smallest size of thickness

3. Diametrically Magnetized: with poles on the curves. Mostly used for discs, cylinders, rings, tubes, arc segments

4. In Pair: with poles on the cuvers. It is a special kind of diametrically magnetizing, with S-N and N-S poles, so that the arc segments can assemble a ring, which is for motors, etc

5. Others

Applications and Safety

  1. NdFeB rare earth magnets are mainly used in motors, generators, poly fitters, maesuring instruments, magnetic drives, magnetic resonnce, sensors, linearactuators, microphone assemblies, apeakers, magnetic hooks, MRI/NMR.

  2. Due to the strong magnetizing, never place neodymium magnets near electronic appliances, such as cards, mobile phones, laptops, tablets, televisions, VCRs, computer monitors and other CRT displays.

  3. Never allow neodymium magnets near a person with a pacemaker or similar medical aid. Keep the magnets away from children.

  4. The neodymium magnets are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets.

  5. Some Neodymium magnets will lose their magnetic properties if heated above 175°F (80°C).

  6. The magnets must be slid off/on. Neodymium magnets are brittle and prone to chipping and cracking. They do not take kindly to machining.

About Shipping

  1. We provide free shipping for most of the products. Some are with economy shipping and some are with express shipping.

  2. Only traceable registered mail will be used for your orders. Tracking number will be updated in the order or in the order message after shipment made. You can see the tracking information in a few days after the tracking number post. Feel free to contact us for help if you are not able to track your package.

  3. For economy shipping, there are many options, including Aliexpress Standard Shipping, ePacket, Korea Post, POS Malaysia, Special Line Yanwen, etc. Most of the packages can be delivered within 10-35 days, but for some countries, economy shipping may take up to 60 days (Brazil may take 90 days). Please don’t hesitate to contact us if we can be of any assistance.

  4. For express shipping, FedEx IE&IP, UPS Saver&Expedited, DHL, DPEX are mostly used. Aliexpress Premium Shipping, EMS, Yodel, SF Express are also available. Express shipping usually takes 4-12 days for a delivery. For magnets, it may take 1-2 more days.

  5. As to magnets, they are not friendly to air shipping, which might be refused by airport safety check. To avoid the accidents and delays, we might choose different shipping method with what you indicated in the order. And we guaranty that the new shipping we use will no slower than what you chose.

After Sales and Feedbacks

  1. Please leave us 5-star DSR ratings if you are satisfied with our products and services. We are dedicated to gain 100% happy customers.

  2. If there is any problem with the logistics or products, please make sure to contact us before leaving negative feedbacks. We have complete aftersales service system at your service all the time.

  3. There are always a way to solve a problem by communications and mutual understanding. You can contact us by below ways:

A. Via Aliexpress Message or Order Messages

B. Via Trade Manager

C. Via Emails or other contacts

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