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How to consider the specifications and types of magnets

When choosing NdFeB magnets, customers should choose the magnet trademark suitable for them according to their working temperature. If the working temperature is higher than the...

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All the questions you would like to know about magnets with (or with) holes are here

To purchase magnets, please feel free to contact Karich Magnet Factory. Our main magnet products include neodymium iron boron shaped magnets, ferrite black magnets, injection molded ferrite magnets, bonded neodymium iron boron, motor magnetic tiles, etc. The specifications, shape, and performance can be processed and produced according to your requirements or drawings.1. Is the front and back faces of the perforated magnet the same size?This situation depends on what holes the customer needs. Currently, the main punching methods for magnets are countersunk holes and through holes. Through holes are the same size as the front and back sides, while countersunk holes are one end large and one end small, which is not very intuitive. It's okay. You can take a look at the product image catalog on our website to learn more.2. Do magnets with and without holes have the same magnetic force?Magnets of the same specification with small holes will have lower magnetic force than those without h

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2023-09

Why do most customers choose to inject ferrite instead of neodymium iron boron

Whether by phone or WeChat, I found that many of the motor customers who inquire about injection molded magnets are inquiring about injection molded ferrite magnets, while inquiries about injection molded neodymium iron boron are relatively few. When searching for injection molded neodymium iron boron manufacturers, I did not find an official website specializing in injection molded neodymium iron boron, indicating that the overall demand for such magnets is low, Today, let's talk about why most customers choose to inject ferrite instead of neodymium iron boron.1、 Lower cost of injection molded ferriteInjection molded ferrite magnetsBoth injection molded ferrite and injection molded neodymium iron boron require molds or openings, and the cost of injection molded neodymium iron boron is higher. Therefore, in order to save costs, enterprises do not choose to use injection molded neodymium iron boron.2、 Injection molded ferrite has better temperature resistanceThe combination of ferri

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2023-09

Introduction to Injected Ferrite

Injection molded ferriteInjection molded ferrite is a type of bonded magnet produced by injection molding technology after mixing ferrite magnetic powder with thermoplastic binders and additives such as nylon 12 (PA12), nylon 6 (PA6), or polyphenylene sulfide (PPS) to form particles. It can be injection molded together with a shaft, and the maximum working temperature can reach 150 ℃, requiring a mold for production.After a brief introduction, let's take a look at some of their differences.1、 Differences in shapeInjection molded ferrite can be used to create complex shapes, while sintered ferrite cannot. It can only be used for simple corner cutting, slotting, and punching processes.2、 Difference in dimensional accuracyThe dimensional accuracy of injection molded ferrite is higher, with a typical tolerance of± 0.08, while the tolerance for sintered ferrite is often plus or minus 0.1.3、 Differences in drop and wear resistanceInjection molded ferrite has superior impact resistance an

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2023-09

Where can I buy a countersunk magnet?

There are many ways to buy countersunk magnets, whether it's square or rectangular, circular, triangular, or arc-shaped. You can buy them on e-commerce platforms, which is not difficult. If you need to purchase in large quantities, you can choose a magnet manufacturer for customization (more reliable and cost-effective). Of course, Taobao, Pinduoduo, JD.com, and other magnet manufacturers will settle in, Choose the size and price that suits you, and generally recommend a small quantity. For example, if you only need a few to use, you can also call the hardware store nearby to inquire if they have one.There are also many options for choosing magnet manufacturers. On Baidu and Alibaba, there are a lot of options to choose from. You can choose some magnet suppliers with good reputation, long operating time, or closer to you to provide quotes. It is better to provide free samples. Generally, ready-made samples may still require some fees if you need customized samples. For specific inf

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2023-09

Introduction to the specific differences between neodymium iron boron strong magnets N42 and N45

The maximum magnetic energy product standard for N42 material is 40-43MGOe, while the maximum magnetic energy product standard for N45 material is 43-46MGOeDifference in residual magnetism between N42 and N45N42 has 13000GS and N45 has 13300GS residual magnetism, which can be measured using specialized instruments.Is N42 4200gs, and N45 4500gs?No. N42 and N45 are the grades of magnetic materials. 4200GS and 4500GS are magnetic field sizes calculated based on your brand and magnet size. Usually, the larger the magnet area, the lower the surface magnetic dispersion.If the shape and size are the same, statistically speaking, N45 will be about 2% higher than N42 (surface magnetic flux density)N42 and N45 raw material pricesThe price of N42 is 188.5 yuan/kg, and the price of N42 is 195.5 yuan/kg. (For reference only)N42 neodymium iron boron magnet surface magnetic size reference;N42/NI/10 * 10 * 3MM, approximately 2860 Gauss.N42/ZN/75x4x5.8mm, approximately 4000 Gauss.N42H/D6.8 * D3.9 * 0.9

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2023-09

The Effect of Magnetic Pad Performance on Electric Motors

(1) High residual magnetic induction intensity Br. Because under the same magnetic pole surface area and air gap, high Br can generate large output torque and power. Electric motors only have high efficiency.(2) High Hcb. Because the Hcb is high, it is necessary to ensure the required electromotive force for the motor output, so that the motor's working point is close to the maximum magnetic energy product, fully utilizing the ability of the magnet.(3) High Hcj. High Hcj can ensure that the motor has strong anti overload demagnetization, anti-aging and low temperature resistance.(4) High (BH) max. The higher the (BH) max, the better the actual operating coefficient of the permanent magnet ferrite in the motor.(5) Magnetic EnergyΦ The larger the better, this will greatly improve the working efficiency of the motor.(6) The better the rectangularity of the demagnetization curve, the smaller the dynamic loss of the motor.(7) The higher the resistivity of permanent magnet ferrite, the s

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2023-09
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