FAQ

  • Q: 1.Why Us?

    1.Scale economy advantage, sharing buyer’s business risk

    Own self-built factory 35,000 square meters, 23 years of professional production experience, huge production capacity.

    2.Strong Processing Ability to Meet All Customer Requirements

    Jintong is equipped with advanced facilities,variety of production mold,can produce high grade of magnet N48,N52,rich experience on production

    3.professional Tech Team

    Jintong R&D team consists of 3 professor-level senior engineers and 6 professional engineers. At present, it has developed 12 new products, 36 technical transformations and 18 innovative technologies. NdFeB manufacturing technology is in an advanced position in the industry.

    4. Proffesional Package and No Worry about Transportation

    Uniform anti-magnetized package which is suitable for various transportation methods; complete document(MSDS;ROHS;THS)and rich operating experience to ensure smooth transportation to your door.444_1t8e

     

  • Q: 2. Neodymium Magnet Application for Permanent Motor and How to Play a Order to Us

    Question from our customer: 

     Could  your magnet be used for permanent magnet aernator generator?

    Our Answer: 

    Yes ,Our magnet is partially esigned for motor/rotor.and our factory only produce the neodymium magnet/permanent magnet.

     We have some fixed clients is motor manufactures. Normally, their supervisor is responsible for purchasing and checking the neodymium magnet.

     

     The motor magnet is asked for 3 Properties

    1.the high grade of magnet(high Flux) :this will increase the times of rotatory per second of rotor.

    2.High working temperature: the mechanic movement is produce high temperature environment.

    3.High magnetic energy: this will help to make more mini motor designation and increase the working efficiency.

     

    A magnet is a decided factor for a motor, the right motor magnet will help the rotor working well ,but if your chose the wrong magnet will destroy the motor even machine.

     

    In order to give u the appropriated magnet for u ,we need more information details:

    1.the usage of magnet?

    Usually, the motor magnet is N40 N42 N45 N48 N50

    We can provide a range of grade of magnet: from N35-N52

    2.the max working temperature?

    We have 80℃ 100℃(M) 120℃(H)

    The 80℃ magnet working under 90℃ will demagnetized.

    The motor magnet is 100℃ Or 120℃

    3.the size of magnet?

    if you can provide us the drawings of magnet is much better

    4.Does your motor will contact water or under a wet environment?

    The neodymium magnet is easy oxides,so we need to do the surface treatment(Coating Zn Or Ni-Cu-Ni)

    The Ni-Cu-Ni three layer coating have better anti-corrosion and anti-oxide performance than Zn Coating. The Zn coating is more economic than Ni Coating.

    AC & DC motor-1

  • Q: 3.Sample fee? Delivery date? Payment terms? Shipment? 

    Sample Fee
    If it is commonly used specifications of the products and our warehouse have inventory, we can provide you with free samples;
    Customized specifications of the products, we need a certain amount of sample fee to control the cost of material.
    Delivery Date
    It’s according to the contract,If for any reason there is a delay, we will contact you with an estimate of the revised delivery date.

    Payment Terms
    T/T, West Union, Paypal are acceptable.Consultation shall prevail.

     

    Shipment
    We always use DHL Courier company.FedEX,EMS etc.,we can talk over this.

  • Q: 4.Can you supply a disc/linder/ring/sphere magnet with one pole on the outside and one on the inside?

    Disc, cylinder, and sphere shapes definitely cannot be manufactured this way.  Rings magnetized this way are referred to as “radially magnetized”, but it is not currently possible to manufacture neodymium ring magnets this way.  We are working on it.

    Ndfeb magnets

  • Q: 5.What materials do magnets attract?

     

    Ferro magnetic materials are strongly attracted by a magnetic force.  The elements iron (Fe), nickel (Ni), and cobalt (Co)  are the most commonly available elements. Steel is ferromagnetic because it is an alloy of iron and other metals.

  • Q: 6.How can I identify the poles of the magnets?

    There are several simple methods that can be used to identify the (Scientific) North and South poles of neodymium magnets.
    1)  The easiest way is to use another magnet that is already marked. The North pole of the marked magnet will be attracted to the South pole of the unmarked magnet.
    2)  If you take an even number of magnets and pinch a string in the middle of the stack and dangle the magnets so they can freely rotate on the string, the North pole of the magnets will eventually settle pointing North. This actually contradicts the “opposites attract” rule of magnetism, but the naming convention of the poles is a carry over from the old days when the poles were called the “North-seeking” and “South-seeking” poles.  These were shortened over time to the “North” and “South” poles that we know them as.
    3)  If you have a compass handy, the end of the needle that normally points North will be attracted to the South pole of the neodymium magnet.
    4)  Use one of our Pole Identifier Devices.
    (Please note: In some magnetic therapy applications, the definitions of the poles are reversed from the scientific definition described above. Please be sure to confirm the proper definition of the poles prior to using magnets for medical purposes)
    Also check out our article, Which Pole is North?

    QQ图片20160818143553

  • Q: 7.How Are The Neodymium Magnets Made?

    Sintered neodymium magnets are made with several steps. At first, a Nd-Fe-B alloy is formulated based on the magnetic characteristics of final permanent magnets supposed to reach. The alloy is produced in a vacuum furnace. Then the alloy is crushed into a powder form. Sintered neodymium magnets are formed by powder metallurgical process. These magnets can be die pressed or isostatically pressed. During the pressing process, magnetic fields are applied with assistance of specially designed fixture to align magnetic “domains” and optimize the magnetic performance of these magnets. Then pressed magnets are placed into a furnace under protective atmosphere for sintering. After sintering the magnet shape is rough, and need to be machined and ground to achieve desired shape and tolerances. A surface coating is usually applied on neodymium magnets. Zinc or nickel coating is common used as a protective layer. Other materials such as cadmium chromate plating or aluminum chromate plating, tin or polymer (epoxy) are also used for this purpose.

     

 

 

 

 

 

 

 

 

INQUIRY DETAILS *

INQUIRY NOW
  • captcha