Permanent Magnets 20150924

Neodymium Magnets VS Ferrite Magnets 

Do permanent magnets really harm our body? 
1. Harm of magnetic field: magnetic fields can promote human blood circulation, and there is no statistic indicating that the magnetic field is harmful to the human body, so we do not need to worry about harms of magnetic field.
2. Whether or not magnetic field harms human body depends on the strength of magnetic field. Generally strength of magnetic field less than 3000 Gauss (magnetic field units) does no harm to human body. Magnetic field strength over 3000 Gauss may harm human body. However such harm of magnetic field to human body is so little that it can be ignored. According to test, the harms magnetic field do on people is only one-fifth of TV.

"High temperature magnet" --- ferrite magnets VS neodymium iron boron magnets

Ferrite permanent magnets and neodymium magnets are different in the following ways:
1. NdFeB magnets are highly temperature-resistant, usually can stand 80 degrees, and demagnetization occurs when the operating temperature exceeds 80 degree.
2. Stability of ferrite magnets is excellent. It is oxide itself, and very stable, while Nd-Fe-B magnet is alloy, and prone to oxidation, so coating is necessary.
3. Performance of neodymium permanent magnets is better than that of ferrite.
4. Price of ferrite is much more favorable than that of NdFeB.

Application of pushing and pulling forces of magnets in rail transport 
There being two different types of magnetic force:
pulling and pushing force, there are two different corresponding application types of magnetic floating trains: a: railway based on repulsion force generated by superconducting electromagnets on trains and coil forces of rails; b railway based on pulling forces of permanent magnet, which means installing magnets at the bottom and tops of the train and equip the T-rail with reaction plate and induction steel plates on bottom and arm parts to control the electric current through magnets, and keep a distance of 10 mm between the magnet and guides (error of plus or minus 2 mm) and to maintain the gravity balance of rail steel and vehicles, so that the vehicles runs suspending on the tracks.

Hot Extrusion Magnets 20150831

Isotropic & Anisotropic Neodymium Permanent Magnet Manufacturer

China Rare Earth Magnet Limited produces two kinds of hot extrusion NdFeB magnets: hot extrusion of isotropic neodymium magnets (MQ2) and hot extrusion of anisotropic magnets (MQ3).

Hot-pressing isotropic NdFeB magnet is isotropic magnet by compacting rapid quenching neodymium iron boron magnetic powder at high temperature.

Hot extrusion anisotropic NdFeB magnet is mainly the radiation orientation of annular magnet, which is made by rapid quenching neodymium permanent magnet powder compacted and extrusion deformed under high temperature.

Features:
1. High magnetic strength, the maximum magnetic energy of radial orientated magnet ring can reach 240 ~ 360 kj/m3.
2. The magnetism of ring magnets across radial orientation, the magnetism is uniform, making the motor run quiet, the torque output is smooth
3. The high heat resistance, the maximum operating temperature can reach 180 ℃.
4. The magnetization poles and magnetic declination are not to be scheduled in the magnet forming process, can be made by changing and designing magnetization coil.
5. The magnetization waveform of the ring magnets can be magnetized as rectangle waveform and other special magnetization waveform according to the user’s requirements.
6. Multi-poles and poles deflection of ring magnets can be realized without assembling, which enables the assembly of motors conveniently.
7. The ring magnet is built in nanocrystalline structure, high density, and has excellent corrosion resistance with epoxy electrophoretic coating
8. The thickness of Epoxy electrophoretic coating can reach 20-35 microns.
9. Hot extrusion anisotropic rare earth permanent magnet ring with radiation orientation is mainly used in EPS motor, servo motor, electric tools, and all kinds of dc motors, etc.

Bonded Neodymium Magnet

NdFeB Permanent Magnet Manufacturer – China Rare Earth Magnet Limited 

Commonly, bonded neodymium magnets are made of NdFeB powder and epoxy resin. Also, they can be molded and extruded with plastic. They have the following characteristics.

1. High Magnetic Performance
The magnetism, which is consistent and stable, is between sintered neodymium magnets and ferrite magnets.

2. High Precision and Great Free Degree of Shape
The shapes and sizes are decided by molds, which can be made into ring, arc, block and so on. They do not need sintering or post processing.

3. Excellent Corrosion-resistance
They can be used for long time in daily or bad environment after being coated or specially process.

4. Various Magnetization Method
They can be magnetized with multi-poles, oblique poles. Also, waveforms include square wave and sine wave.

Bonded neodymium magnets are mainly used in various kinds of micro permanent magnet motors, including spindle motors, stepping motors, synchronous motors, direct current motors and DC brushless motors. They can partly take place of neodymium magnets and ferrite magnets, which makes assembly process simpler, cheaper, more reliable and more efficient.

N35 Magnets

N35 Neodymium Permanent Magnets in Disc, Block, Ball, Ring 

N35 Neodymium Disc Magnets Manufacturer China Rare Earth Magnet Limited: 
Material: Sintered Neodymium Iron Boron Magnets
Grade: N35
Plating: NiCuNi
Magnetized through Thickness 30mm
Size: D45x30mm / Price: USD***/pc
Size: D50x30mm / Price: USD***/pc
Size: D60x30mm / Price: USD***/pc

N35 16x10x2mm Neodymium Block Magnets: 
We are an experienced manufacturer of permanent magnets .
Material: Sintered NdFeB Magnets
Grade: N35
Size: 16x10x2mm
Plating: Zinc Magnetized through Thickness 2mm
USD***/pc

Neodymium Magnetic Ball Manufacturer China Rare Earth Magnet Limited: 
We are neodymium ball magnets manufacturer, if you want to order such products, we need to know the grade, size, and quantity.
Grade: N35
Size: D5mm
Magnetized Through Diameter
Plating / Price:
NiCuNi / USD***/pc
Gold / USD***/pc
Color Blue / USD***/pc

N35 Ring Neodymium Magnets : 
Material: Sintered NdFeB Magnets
Grade: N35 Permanent Magnet
Plating: NiCuNi
Magnetized through Axial
Size/Price:
D50.8xd44.45x9.53mm / USD***/pc
D26.92xd12.497x9.98 / USD***/pc
D9.53xd3.175x1.52mm / USD***/pc

N50 Block Permanent Magnets 20150604

N35, N42, N50 Neodymium Block Magnets 50x20x9mm with NiCuNi Coating 

50x20x9mm Neodymium Block Magnets :
I’m from México. I'm looking for magnets neodymium with dimensions 20 mm x 50 mm x 9 mm thick. Please send proposals and prices, we need as 1000 pieces.

NdFeB Magnets Manufacturer China Rare Earth Magnet Limited: 
Thanks for your enquiry about neodymium permanent magnets.
You didn't mention the grade of the magnet in last email. We provided a quotation below based on N35, N42 and N50 for your reference. The maximum working temperature of these materials is 80℃.
Material: Sintered NdFeB Magnets
Size: 50x20x9mm
Magnetized through 9mm
Grade / FCA Hong Kong Price
N35 / USD***/pc
N42 / USD***/pc
N50 / USD***/pc
Please feel free to contact us if you would like to order or have other questions.

Magnetic Properties: 
I have some questions:
1. How many gauss has the N50 grade?
2. How many gauss has the N42 grade?
3. Has coating to prevent corrosion?

Magnetic Properties of N42 & N50 Neodymium Magnet: 
Here is the magnetic property of N42 and N50 permanent magnet for your reference. Which grade would you like to order?

Yes. Ni-Cu-Ni is a triple layer coating of Nickel-Copper-Nickel which is good to prevent magnets from oxidation and corrosion.
I will calculate shipping cost and total amount for you when you decide to order.

Magnet Order: 
We will request 1,000 pieces grade N50, please give me your account number to make the transfer if you can calculate the shipping cost.

Permanent Magnet Manufacturer China Rare Earth Magnet Limited: 
We are pleased to receive your order of N50 magnets.
The gross weight of 1000 pieces is 92KGS or so. Which airport is the nearest one to your delivery address?
I will calculate air freight cost for you.

Shipping Neodymium Magnets by Air: 
The name is International Airport of Mexico City.

China Rare Earth Magnet Limited: 
We prepared a Pro-forma Invoice attached for your information.
Please arrange payment after you confirm to order the magnets.

N35 Ring Magnets D14xd8x12mm with Black Epoxy Coating

China Neodymium Permanent Magnet Manufacturer 

N35 Neodymium Ring Magnets: 
I had an idea for an invention that would make screwdrivers easier to use. I need to locate a neodymium N35 ring magnet with an inner diameter that would slip over a standard driver bit which I believe is between 7.7 an 8mm.
The outside diameter isn't critical, but it would be nice to have a thicker cross section, like 5 or 6 mm.
Do you have anything like that as a stock size?

Neodymium Magnet Manufacturer China Rare Earth Magnet Limited:
Currently we don't have same or similar sizes in stock.
We can produce permanent magnets in compliance with your specific dimensions.
How about the axially thickness of the ring magnets?
And how many pieces do you need?
D14xd8x thickness (mm)

N35 D14xd8x12mm Ring Magnets with Epoxy Coating: 
D14mm X d8mm X AT 12mm times 500 pieces N35 epoxy coated to start with to see how I can manufacture my new invention.
Shipping quote would be to Canada

Permanent Magnet Manufacturer China Rare Earth Magnet Limited: 
Please find our quotation as below:
Material: Sintered NdFeB Magnets
Size: ring, D14xd8x12mm
Grade: N35
Ex-works Shenzhen Price: USD***/pc
Magnetized through Thickness
Black Epoxy
Please feel free to contact us if you would like to order or have other questions.

Freight: 
Does that quote include shipping to Canada, or is that extra?

Shipping Neodymium Permanent Magnet by Express: 
The shipping cost was not included in the price I gave you.
The shipping cost of 500pcs to Canada by express excluding any taxes or duties is US$***.
I will send you a Pro-forma Invoice when you decide to order.

China Rare Earth Magnet Limited
Tags: Neodymium Magnet China, Ring Magnets

Rare Earth Permanent Magnet Technology Improves Financing Value of Neodymium Magnets

Neodymium Permanent Magnets Manufacturer China Rare Earth Magnet Limited 

Developed by China Aerospace Science and Technology Cooperation, bonded neodymium segment magnets with the biggest dimension, recently, are successfully manufactured by Aerospace Electro-magnet Cooperation in Hunan. Performance indexes of the sample all meet standard. It will soon be sent to the USA. Net weight of the bonded neodymium magnet reaches 400g, which is a Big Mac, comparing with traditional mini bonded neodymium magnets weighing only a few grams.

As a milestone in the development of rare earth permanent magnetic materials, neodymium magnet materials are called “King Magnet”, due to the excellent magnetic performance. With extremely high energy product, coercive force and energy dense, applications of neodymium permanent magnet materials are taken to an extreme, which are widely used in modern industry and electric technology and usually employed in instruments, motors and separators.

Permanent magnets play an important role in strategic emerging industry, of which the sophistication is a significant standard of evaluating a country’s technological level. As a priority in permanent magnets, neodymium magnets have an undoubtedly essential position in area of rare earth application. Zhang Anwen, secretary general of Chinese Society of Rare Earth indicates that in the future application area of rare earth, permanent magnets, oil catalytic cracking and emission purification will have the fastest growth. It is expected that in 2018, the compound growth rates will respectively reach 10.1%, 8% and 6%.

Some organizations point out that frequency air-conditioners, wind power and energy-saving elevators are the main growing power in extension of permanent magnets’ application, especially in automobile market. According to statistics, each hybrid power car consumes 2.5 kilograms of neodymium magnets and each electrical car needs 5 kilograms.

Meanwhile, according to expectation of Global Wind Energy Council, installation capacity of wind energy will be doubled during 2013 to 2017. In addition, lifting machines, oil pump motors, magnetic separators, electric tools and rail transportation will have stably increasing demand of rare earth permanent magnetic materials. It is estimated that demand of rare earth permanent magnet will reach 150 thousand tons after 5 years.

With continuous improvement of permanent magnet technology, neodymium magnet application will be broadened as well as investing value of rare earth metals will be manifested.

China Rare Earth Magnet Limited
Tags: Neodymium Magnets