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FAQs

1
FAQ
Q: Are you trading company ort manufacturer?
A: ZK magnet is a top manufacturer of ferrite magnets and Ndfeb magnet for over 35years.
Q: Which information do we need to supply when i have inquiry?
A: If you have any inquiry,pls kinday advise the following items:
Magnet's dimensions or drawing with tolerances;Material grade or magnetic properties magnetic direction,surface coatin(if nevessary);quantiry and delivery terms.
Q: What about the delivery time of our products?
A: Generally, Ndfeb magent is about7-10days if the materials in stock, or it is 15days if the materials are not in stock .it is according to quantiry.
Segment ferrite magnet, if have suitable tooling, need about 7-10days.
If have no tooling, need open a new tooling, need about 35days.
Cutting Block ferrite magnet is about 7-10days.
Other sharpe, Ring ferrite manget/Disc ferrite magnet need about 7-10days. MOQ:10pcs
Q: How to pay you?
A: T/T in advance(telegraphic transfer -banck order) for small order, or samples order. or shipment by air. Western Union case-for small order or samples order. Other payment: L/C, D/A, D/P, MoneyGra, Paypel, Alipay or Escrow
Q: Could I pay a visit to your factory?
A: Yes,of course.Our plant locatd 1 hour from Yiwu station,2.5hours from hangzhou airport, 3.5hours from shanghai airport by car. if you need, we will help you visit our factory.
We will have a professional team to accompany you throughout the tour until you return home.
Q: How to solve the quality problems after sales of zk magnet?
A: Take photos of the problems of magnet and send to us, after we comfirm the problems, within three days,we will make a satisfied solution for you,Zk magnet always your most reliable partner.
Q: How long can the magnetic properties of neodymium magnets last?
A: Neodymium magnet has a very high stubborn force, and there will be no demagnetization and magnetic changes under the natural environment and general magnetic field conditions. Assuming that the environment is appropriate, even after a long period of use, the magnetic property loss of the magnet will not be very large. Therefore, in practical applications, we often ignore the influence of time factors on magnetic performance.
Q: What are the vertical, parallel and true roundness of the magnet?
A: For example, circular magnet
External diameter D10-D30mm range
Vertical: 0.15 mm
Parallel: 0.10 mm
True: 0.15 mm
External diameter D30-D60mm range
Vertical: 0.20 mm
Parallel: 0.15 mm
True: 0.20 mm
The above is the general standard, if there are any special requirements please indicate on the order.
Q: What are the factors that influence the price of Ndfeb magnets?
A: 1) Material cost: The higher the performance requirements, the higher the cost, such as neodymium magnets, N45 price is much higher than the N35 price;
2)Processing costs: The more complex the shape, the higher the processing cost; The stricter the tolerance, the higher the processing cost; The smaller the batch, the higher the processing cost.
Q: Which magnet has the highest surface magnetic field strength?
A: The surface magnetic field strength of magnets of the same shape and size is ranked from high to low, followed by neodymium iron boron> cobalt> aluminum nickel cobalt> ferrite> rubber magnet.
Example: Cylinder D10x5mm
Neodymium Magnet: 4,200 Gauss
Cobalt: 3,300 Gaussian
Ferrite: 1,200 Gaussian
The above table magnetic data of Magnetis for reference only.
Q: What are the parameters of magnetic properties? What do they mean respectively?
A: There are three main parameters:
Resume Br(Resume Industry), unit: Gaussian Gauss, that is, after removing the magnetic field from the saturated state, the remaining flux density represents the strength of the magnetic field that the magnet can provide externally;
2) Restraint Hc(Chemical Force), units: Ostersteds, that is, placing the magnet in a reverse external magnetic field, when the applied magnetic field increases to a certain strength, the magnetism of the magnet will disappear, and this resistance to the applied magnetic field The ability is called stubborn force, It represents the anti-magnetic ability of the magnet; 3)Magnetic energy product BHmax, unit Gauss-Oersteds, which is the magnetic field energy generated by the unit volume material, is a physical quantity of energy that a magnet can store.
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