Neodymium Permanent Magnets for Hoverboard 20170225

Neodymium Permanent Magnets for Hoverboard 20170225
Magnetic Hover-board: From the Film to Reality

The hover-board may just showed in the film Back to the Future by Michael J Fox in 1989, but it didn’t stop a generation of youngsters to gain one, whether it can skate or not.

Until now, it has taken almost 30 years for the engineers to achieve this dream. They found it is technically possible to make a hover-board with the help of permanent magnets, semiconductors, and liquid nitrogen. And such a hove-board is already invented in lab, even it can only hold a toy soldier.

In brief, the superconductor is wrapped by tinfoil, and put into liquid nitrogen that has been cooled into -197°C (-322F), and then placed on the neodymium magnetic track. Under such incredible temperature, the electric resistance of superconductor almost turns to nothing, which means it can conduct strong currents that create intense NdFeB permanent magnetic fields. Therefore, when you put such a superconductor over the magnetic track, it hovers an inch or more.

So, by now, the real problem is how about the hover-board on the streets without neodymium magnets inside, like pavement or park? Actually, Swedish carmaker Volvo has already built a testing track with NdFeB permanent magnet  being placed in the middle and edges of the lanes to develop driverless cars. And they also found that it is better to place these neodymium block magnets  on the surface of the road, rather than inside. Thus, it may possible to have hover-boards in our daily life in the future, and living like a scientific film may not only a dream.


Tags: permanent magnet, neodymium magnet

SmCo VS NdFeB Permanent Magnets 20170222

SmCo VS NdFeB Permanent Magnets 20170222
SmCo Magnets and NdFeB Magnets for Brushless DC Motor in Vacuum

Look for SmCo & NdFeB Magnets  in Brushless DC Motor: 
I am busy designing a brushless DC motor to be used in a vacuum environment.
Do you know if the bonding material (if any) in your Samarium Cobalt and Neodymium permanent magnets will outgas in vacuum?
I do not have the final size yet, but it will be in the region of *** mm.
My maximum working temperature is below 100°C.
From what I heard the neodymium magnets do not hold up well in vacuum due to its bonding material that "dissolves" in vacuum.
I think the  SmCo magnets  are normally used for vacuum, but wanted to confirm it with you.
Is there a specific magnet type that you would recommend I use?

NdFeB Permanent Magnet Manufacturer China Rare Earth Magnet Limited:
Is you required a shape of rectangle?
Normally, the magnets used in motors are in arc shape.
Many customers use neodymium magnets in motors.
Bonded NdFeB magnets are produced by single-time molding of the mixture of quick-quenched NdFeB powder and bonding agent.
At present, the manufacture process of bonded NdFeB includes "compression molding" and "injection molding".
Compressed bonded NdFeB is made of magnet powder and thermosetting resin (epoxy resin).
Injected bonded NdFeB is made of magnet powder and thermoplastic resin (PA, PPS .etc).
As a whole, it should not dissolve in vacuum (below 100°C)

Requirements to the Magnets Used in Space: 
The magnets will be in an arc shape as you mentioned.
What I probably forgot to mention is that we want to use it in space.
Therefore it should be non-reactive with radiation and atomic oxygen and it must have a life of 7 years.
According to articles, the NdFeB magnets do not last very long in this environment and SmCo should rather be used.

SmCo Permanent Magnets Manufacturer  China Rare Earth Magnet Limited:
Actually, SmCo magnets best fit for the application of aerospace.
Please send us an enquiry of the magnets when you have specific information of the magnets.

Tags: permanent magnet, SmCo magnets, NdFeB magnets, magnet manufacturer, China magnet

Main Parameters of Permanent Magnetic Coupling 20170218

Main Parameters of Permanent Magnetic Coupling 20170218
Neodymium Permanent Magnet Manufacturer China Rare Earth Magnet Limited

Commonly, magnetic coupling  includes several parts: outer rotor, inner rotor, isolating sleeve, and bearing system. Among them, the isolating sleeve and bearing system are used for magnetic transmission. And there are permanent magnets on the rotors in the form of N-S crossing. Only if aligning the magnets, the outer and inner rotor will couple automatically. 

There are main factors for the quality of permanent magnetic coupling as below.

Materials 
Generally, the metal materials always include austenitic stainless less, titanium alloy, hastelloy, etc. For example, with the centrifugal pump in 1900rmp, the eddy current of stainless steel coupling will lose 15% to 20%, while hastelloy can decrease the lost with high electrical resistivity, which is rather expensive in price nevertheless. On the contrast, the non-metallic materials like engineering plastics PEEK and ceramic can even avoid any lost of eddy. However, with high cost and poor impact-resistance, these materials can’t be used widely either.

Magnets 
When the working temperature ≤80℃, rotating speed ≤1000rpm, and the pressure ≤0.5MPa, the neodymium magnet   is the best choice; while the working temperature up to 200℃, it is better to use SmCo permanent magnet. And in that condition, the larger turning radius can be a reference to reduce the arm length of outer rotor accordingly, so as to minimize magnets usage. 

Cooling methods
If the working environment is high temperature, high pressure and high rotating speed, such as 300℃, 3000rpm and 5MPa, it is necessary to consider cooling methods. Usually, there are two ways of cooling: forced air cooling and water cooling. 

Tags: permanent magnet, magnetic coupling, neodymium magnet

Disc Neodymium Permanent Magnets Manufacturer 20170215

Disc Neodymium Permanent Magnets Manufacturer 20170215
N45 Neodymium Disc Magnets in Round Metal Cup

Look for Strong Disc Magnets for Round Metal Cup: 

We need permanent magnets in disc form, stronger, material is not important. We need to be installed in the boxes, maybe in round metal cup.
Magnetic power of at least 1,2kg
Max. working temperatur is  arround 21°C/ room temp..
Magnetized direction is through thickness.
What do you recommend?

Neodymium Magnet Manufacturer China Rare Earth Magnet Limited:
We are an experienced permanent magnet  manufacturer, specialized in producing NdFeB magnets.
According to your requirements, we choose the magnets below for your reference.
Material: N35/N45 neodymium disc magnets 
Coating: Ni-Cu-Ni
Magnetized direction: through thickness
Unit price: USD**/pc

Ask for the Force of the Magnets: 
What it means “Grade N45”?
What is the power/force of magnets? This is very imported for us!
Is it of 1,2kg?

NdFeB Permanent Magnets Manufacturer   China Rare Earth Magnet Limited:
Neodymium magnets can be classified in to many grades.
Different grades have different magnetic power.
According to attracting force of 1.2kg you required, our engineers recommend grade N45 for you, which can meet your need.
However, our engineers also suggest to buy samples to test first, because magnetic power should be subject to actual test.

Tags: permanent magnet, neodymium magnet, magnet manufacturer, China magnet

Neodymium Permanent Magnets for Lamp 20170211

Neodymium Permanent Magnets for Lamp 20170211
An Infinite Adjustable Light: The Faro Lamp with Neodymium Magnets

LaSelva Studio designed an infinite adjustable light The Faro Lamp.

It can be placed in anywhere of your house, even the corner, for the light can be given to any direction, up or down, right or left, which is just benefit from the strong neodymium magnets    inside.

Composed of only two main parts, a permanent magnets base and a spherical lamp shade, the lamp can achieve a number of actions, like rotating, wiggling, turning, tilting and so on. It can be adjusted 360° horizontally, 45° vertically, and sideways at any angle as the user requires. Besides, the material and color are also innovative, the buyer can choose different colors for the base and the lamp shade according to their preferences to match different decorative styles.

China Rare Earth Magnet Limited customizes NdFeB neodymium permanent magnets   for different applications. 

Tags: permanent magnets, neodymium magnets

Ring NdFeB Permanent Magnets 20170208

Ring NdFeB Permanent Magnets 20170208
Large N52 Neodymium Ring Magnets for Special Electrical Motors

Look for Large Ring Permanent Magnets for Electrical Motors:
My factory build special electrical motors. And now, I need an offer about some large motor magnets  first for calculation. Can you send me possible dimensions and prices for the ringmagnets.


1.Material: Sintered NdFeB Magnets
2. Grade: N42 or more
3. Plating: Zn
4. Magnetized: yes
5. Magnetization direction: All through thickness
If possible than Tolerance  ±0.01

NdFeB Permanent Magnets  Manufacturer China Rare Earth Magnet Limited:
We are an experienced in producing neodymium magnets.
As magnets used for eletrical motors are customized products, we produce magnets according to client's requirements.
But dimensions of the magnets are too big.
We need to check if we can produce the magnets in such big sizes.

New Specification of the Neodymium Magnets:
I made a new construction now.
Grade: N52 if possible, otherwise the highest as possible (N50, N48,…)

Neodymium Permanent Magnet Manufacturer China Rare Earth Magnet Limited:
Please kindly check the following price:
Material: N52 NdFeB magnets
Size: Large ring shape as per requirement
Plating: Zn
Magnetized direction: through thickness
Unit price: USD**/pc

Tags: permanent magnet, NdFeB magnets, neodymium magnet, neodymium ring magnets, large magnets, magnet manufacturer, China magnet

Custom Neodymium Permanent Magnets 20170204
Strong Custom Neodymium NdFeB Magnets for Steel Gas Cylinder

Look for Custom Neodymium Magnets for Steel Gas Cylinder: 
We are looking for a strong magnet that should stick on a curved surface of a steel gas cylinder, as shown in attached image. The goal is to put an ID label on the cylinder, then cover it by this magnet, so that the label does not get damaged during sandblasting of cylinder.

The magnet should cover not much more than the label size.
Would this be possible to have one for testing?
If ok, we could order some hundreds of them for our manufacturing process.

Custom Neodymium Permanent Magnet Manufacturer   China Rare Earth Magnet Limited:
Many thanks for contacting us.
May I ask why do you choose magnet for such application?
It seems that any leather/paper patch with adhesive tape can achieve similar effect.

The Reason to Choose Strong Permanent Magnets: 
We want to put the label on the steel cylinder before it gets sandblasted to remove all the old paint and rust. A paper or leather adhesive patch would be blown away during this process because the sandblast compressor is really powerful!
That's why we are thinking of strong magnets. They would cover the label and they are easy to put on and remove again.

Custom NdFeB Permanent Magnets Manufacturer  China Rare Earth Magnet Limited:
Well noted.
Thank you for your reply.
Please confirm do you need the neodymium magnet   will be in square shape or arc shape?
Could you please be more specific about the dimensions?

Need Arc Shaped NdFeB Magnets with One Side Curved: 
The best is that one side is arc shaped, because then it would fit nicely on the curved top of the cylinder. The size should be rectangular.
It should look a bit like this: 1 of the 2 large sides should be slightly curved...

China Rare Earth Magnet Limited manufactures permanent magnets with different materials like NdFeB neodymium iron boron in customized shapes.

Tags: permanent magnet, neodymium magnet, NdFeB magnets, magnet manufacturer, China magnet