The earth itself have super magnetic field, so body has adaptability to magnetic field even if dependence on magnetic field. Medical domain speaking weak and stable magnetic field is good for health, so kinds of magnet therapy items produced.
19, What type of magnets can be used as motor magnets?
For magnetic materials, motor magnets can use rare earth motor magnets(include SmCo motor magnets and NdFeB motor magnets) and Ferrite motor magnets/ceramic motor magnets;
For shapes of magnets, motor magnets can adopt disc magnets, arc magnets, ring magnets, and trapezoid magnets
20, What is salvage magnets?
Salvage magnets are strong magnets that specially used to salvage metal things from river or marine. At the beginning, nude neodymium magnets with holes were used as salvage magnets. But the magnet material is fragile, then people think out ways with magnetic circuit design that not only prorect the magnets from damage but also strength the magnetic force, the products are known as pot magnets or channel magnets. With strong magnetic force, the magnetic assembly often used to search metal things under deep water. So that salvage magnets also called as search magnets and fishing magnets.
21, Can you make hole through NdFeB sphere magnets / NdFeB magnetic balls?
Yes, we can make hole on NdFeB sphere magnets/magnetic balls.
22, Can you supply waterproof magnets?
Yes, are professional water proof magnets producer, and we can make all kinds of waterproof magnets. Our water-proof magnets include rubber coated magnets, plastic coated magnets and teflon coated magnets.
23，Will SmCo magnets rust or not?
Because the SmCo magnets contained iron components, so SmCo magnets will also rust. But compared with NdFeB magnets, the iron content is relatively low, therefore, rust phenomenon is not very serious for SmCo magnets. If put the SmCo magnets in the seawater, the surface will produce some rust, but does not affect its performance and use. Therefore, usualy SmCo magnet does not require electroplating.
24, Which type of SmCo magnet is more expensive? SmCo(1:5) or SmCo(2:17)? Why?
First of all, the price of SmCo5 magnet is higher than the price of Sm2Co17 magnet.
Cobalt content of smco5 magnet is higher than sm2co17 magnet, Cobalt metal is a scarce metal in China and needs to be imported, so the price is very expensive. In addition, the content of rare earth is higher for SmCo5 magnet, besides of cobalt, others are samarium and praseodymium rare earth material.Because of strict control of mining and resource scarcity,the prices for rare earth material are too expensive now. So, although the magnetic energy of SmCo5 magnet is lower than that of Sm2Co17 magnet, but the price of SmCo5 magnet is higher than Sm2Co17 magnet.
25,What's the difference between SmCo5 magnets and Sm2Co17 magnets?
The representation of grades is different: SmCo5 magnet is represented by XY, while Sm2Co17 magnet is represented by XYG
The ingredients is different: the main ingredient of SmCo5 magnet is samarium ,cobalt, praseodymium, or just pure samarium cobalt. The main components of Sm2Co17 magnet are samarium,cobalt, copper, iron, zirconium.
The physical performance is different: the maximum working temperature of SmCo5 magnet is 250℃, the maximum operating temperature of Sm2Co17 magnet is 350℃, the mechanical and physical performance of SmCo5 magnet is better than Sm2Co17 magnet, slightly easier to process, and Sm2Co17 magnet is more brittle.
26, Why do you need sample fee for magnet sample?
1，The rare earth magnetic material are usually very expensive, such as samarium cobalt magnet and neodymium-iron-boron magnet, which belongs to non standard parts, magnets are customized product, unlike the standard parts are ready to take a few as samples, usually need to go through a complex machining process. The machining cycle usually take about a week or even longer. It produce a certain amount of manpower cost.
2, Each process needs to occupy the corresponding production equipment, which will cause some delay to other normal order.
3, The quantity of samples is small, sometimes the processing ways of samples are different from that of batch order, batch orders are made with matched rough material,
While samples are usually made with non-matched rough magnetic material, this not only cause waste on magnetic material but also need more process. So the unit price for samples is much more than that from batch order, we can not make samples at the price for batch order.
4, In fact, the sample fee we charge is much less than the actual cost of the sample, the purpose is hope to genuine cooperate with customers, also to remind customers to be careful on making magnet samples, minimize unnecessary costs.
So we hope every customer think of it from our point of view, and bear some cost for magnets sample. Thank you!
27, How long will the plating take for NdFeB magnets?
How long the plating take for NdFeB magnets? There is no specific answer, generally look at where the NdFeB magnets used, and whether need salt spray test, if you want the NdFeB magnets pass salt spray test, it will be longer, or 3-4 hours is ok .
28, Why there is unfilled corner for neodymium magnets after electroplating?
Unfilled corner can not be avoided during the process of electroplating for neodymium magnets, the following factors can cause unfilled corner to a neodymium magnet.
1, The chamfer of the neodymium magnet is not big enough
2, The size of neodymium magnets are too large
3、The speed is too fast and the neodymium magnet knock against each other.
4、Material of the neodymium magnets has problems, it is too brittle
29, How to check the coating quality for neodymium strong magnets?
Because the corrosion resistance of neodymium magnets is poor, so electroplate needed to improve the corrosion resistant ability, most of the neodymium magnet manufacturers just send the neodymium magnet to the electroplating factory for electroplating, the plating is good or not, how to detect the quality of the coating for a neodymium magnet? What are the detection methods?
The quality of the coating has a direct impact on the service life of NdFeB magnet, and the main methods for testing the quality of NdFeB magnets coating are as below:
1, visual appearance
The appearance is mainly observed by the naked eye, in the natural light (sunlight, non direct) under the best, or in the illumination equivalent to 40W fluorescent lamp observation. There should be no blisters, peeling, partial plating and uneven tone, stains, water stains and so on
2, Measure the coating thickness of NdFeB magnets.
3, Drop testing which is mainly for galvanized NdFeB magnets products
4, Cross cut testing which is mainly for Nickel plating NdFeB magnets.
5, Quench and thermal shock testing
6, PCT pressure test
7, SST salt spray test
8, Constant temperature and humidity test, etc.
30,Where to buy/purchase countersunk magnets?
Countersunk magnets include neodymium countersunk magnets,ceramic countersunk magnets and SmCo countersunk magnets. Meank Magnetics is a professional neodymium countersunk magnets producer,we can make high-quality neodymium countersunk magnets for you.
31, How to choose magnets?
Before choosing one magnet,have to know what function needed for the magnets?
The shape of needed magnets:disc magnets,ring magnets,block magnets,arc magnets and cone magnets.
The sizes of needed magnets: length,width,height,diameter and tolerance.
The magnetic force,quantity and target price of the needed magnets
32, What is direction of magnetization?
Most of magnetic materials can be fully magnetized through a certain direction,this direction is called as direction of magnetization(direction of oriented).The the magnetic force of magnets that have no direction of oriented(called as isotropic magnets) are weaker than the magnets have direction of oriented which called as anisotropic magnets.
33, Where to buy high quality neodymium magnets?
There are so many China neodymium magnets suppliers,but not every supplier can supply high-quality neodymium magnets. As a professional magnetic material producer,Meank Magnetics only deliver qualified neodymium magnets,which include good properties and good appearance. We sincerely welcome every customer's offer request.
34,What is the difference between Zinc plating and Nickel plating on Nd-Fe-B magnets?
1.Difference appearance,Zinc plating is white or blue,nickel plating is silver,it looks brighter than Zinc plating.
2.Corrosion resistance is different,nickel plating can generally pass neutral salt spray test 48 hours,zinc plating is generally 24 hours.
3.The viscosity of zinc plating is better than tha of nickel plating.
4.There's no difference in magnetism.