Neodymium disk magnets, also known as round or circular magnets, are flat and cylindrical in shape. They are made from neodymium, iron, and boron, offering one of the highest magnetic strengths among rare earth magnets. Their compact and symmetrical design makes them especially suitable for applications where high magnetic performance is needed in a slim or embedded form. These magnets are widely used in sensors, consumer electronics, medical equipment, and industrial holding systems.
Disk magnets are known for their small size, high magnetic force, and wide applicability. Their flat surface and circular shape make them easy to embed in tight spaces, and they provide consistent and strong magnetic fields. Sintered NdFeB disk magnets are also resistant to demagnetization and can be coated for corrosion protection.
Why choose Sintered Neodymium Disk Magnet
● High magnetic performance: Disk magnets deliver powerful magnetic force even at small sizes, ideal for compact devices.
● Versatile application: They can be used in a wide range of applications from electronic sensors to industrial clamping.
● Easy installation: The flat surface allows for secure bonding or mounting on various materials.
● Customizable dimensions: Disk magnets can be tailored in diameter and thickness to meet specific design needs.
● Stable output: Their shape and material properties provide reliable and long-lasting magnetic force.
NdFeB disk magnets are commonly found in precision electronic components, such as microphones, sensors, and miniature motors. They are also used in medical instruments, magnetic therapy devices, and smart gadgets. As more industries move toward miniaturization and energy efficiency, disk magnets continue to play a critical role in modern product development.
| Material grade | Remanence Br (T/kG) | Coercivity Hcb (kOe/kA/m) | Intrinsic Coercivity Hcj (kOe/kA/m) | Maximum Energy Product (MGOe/kJ/m3) | Dy | Tb | Remarks |
| KN35 | ≥1.18(11.8) | ≥10.8(860) | ≥12(955) | 33～36(263～287) | √ | × | Scrap Inclusion |
| KN38 | ≥1.23(12.3) | ≥10.8(860) | ≥12(955) | 36～39(287～310) | √ | × | Scrap Inclusion |
| KN40 | ≥1.26(12.6) | ≥11.0(876) | ≥12(955) | 38～41(302～326) | √ | × | Scrap Inclusion |
| KN42 | ≥1.29(12.9) | ≥11.0(876) | ≥12(955) | 40～43(318～342) | √ | × | Scrap Inclusion |
| KN45 | ≥1.33(13.3) | ≥11.0(876) | ≥12(955) | 43～46(342～366) | × | × | |
| KN48 | ≥1.37(13.7) | ≥10.8(860) | ≥12(955) | 46～49(366～390) | × | × | |
| KN50 | ≥1.39(13.9) | ≥10.5(836) | ≥12(955) | 47～51(374～406) | × | × | |
| KN52 | ≥1.42(14.2) | ≥10.0(796) | ≥11(876) | 49～53(390～422) | × | × | |
| KN55 | ≥1.46(14.6) | ≥9.0(716) | ≥11(876) | 52～56(414～446) | × | × | |
| KN35M | ≥1.18(11.8) | ≥10.8(860) | ≥14(1114) | 33～36(263～287) | √ | × | Scrap Inclusion |
| KN38M | ≥1.23(12.3) | ≥11.0(876) | ≥14(1114) | 36～39(287～310) | √ | × | Scrap Inclusion |
| KN40M | ≥1.26(12.6) | ≥11.4(910) | ≥14(1114) | 38～41(302～326) | √ | × | Scrap Inclusion |
| KN42M | ≥1.29(12.9) | ≥11.8(939) | ≥14(1114) | 40～43(318～342) | √ | × | Scrap Inclusion |
| KN45M | ≥1.33(13.3) | ≥11.8(939) | ≥14(1114) | 43～46(342～366) | √ | × | Scrap Inclusion |
| KN48M | ≥1.37(13.7) | ≥11.8(939) | ≥14(1114) | 46～49(366～390) | × | × | |
| KN50M | ≥1.39(13.9) | ≥11.5(915) | ≥14(1114) | 47～51(374～406) | × | × | |
| KN52M | ≥1.42(14.2) | ≥10.8(860) | ≥13(1035) | 49～53(390～422) | × | × | |
| KN54M | ≥1.46(14.6) | ≥10.8(860) | ≥13(1035) | 52～56(414～446) | × | × | |
| KN35H | ≥1.18(11.8) | ≥10.8(860) | ≥17(1353) | 33～36(263～287) | √ | × | |
| KN38H | ≥1.23(12.3) | ≥11.0(876) | ≥17(1353) | 36～39(287～310) | √ | × | |
| KN40H | ≥1.26(12.6) | ≥11.4(910) | ≥17(1353) | 38～41(302～326) | √ | × | |
| KN42H | ≥1.29(12.9) | ≥11.8(939) | ≥17(1353) | 40～43(318～342) | √ | × | |
| KN45H | ≥1.33(13.3) | ≥11.8(939) | ≥17(1353) | 43～46(342～366) | √ | × | |
| KN48H | ≥1.37(13.7) | ≥11.8(939) | ≥17(1353) | 46～49(366～390) | √ | × | |
| KN50H | ≥1.39(13.9) | ≥11.5(915) | ≥16(1274) | 47～51(374～406) | √ | × | |
| KN52H | ≥1.42(14.2) | ≥10.8(860) | ≥16(1274) | 49～53(390～422) | √ | × | |
| KN54H | ≥1.46(14.6) | ≥10.8(860) | ≥16(1274) | 52～56(414～446) | √ | √ | |
| KN30SH | ≥1.08(10.8) | ≥10.0(796) | ≥20(1592) | 28～31(223～247) | × | × | |
| KN33SH | ≥1.14(11.4) | ≥10.5(836) | ≥20(1592) | 31～34(247～271) | × | × | |
| KN35SH | ≥1.18(11.8) | ≥10.8(860) | ≥20(1592) | 33～36(263～287) | √ | × | |
| KN38SH | ≥1.23(12.3) | ≥11.0(876) | ≥20(1592) | 36～39(287～310) | √ | × | |
| KN40SH | ≥1.26(12.6) | ≥11.4(910) | ≥20(1592) | 38～41(302～326) | √ | × | |
| KN42SH | ≥1.29(12.9) | ≥11.8(939) | ≥20(1592) | 40～43(318～342) | √ | × | |
| KN45SH | ≥1.33(13.3) | ≥11.8(939) | ≥20(1592) | 43～46(342～366) | √ | × | |
| KN48SH | ≥1.37(13.7) | ≥11.8(939) | ≥19(1512) | 46～49(366～390) | √ | × | |
| KN50SH | ≥1.39(13.9) | ≥11.5(915) | ≥19(1512) | 47～51(374～406) | × | √ | |
| KN52SH | ≥1.42(14.2) | ≥10.8(860) | ≥19(1512) | 49～53(390～422) | × | √ | |
| KN54SH | ≥1.46(14.6) | ≥10.8(860) | ≥19(1512) | 52～56(414～446) | × | √ | |
| KN30UH | ≥1.08(10.8) | ≥10.0(796) | ≥25(1990) | 28～31(223～247) | √ | × | |
| KN33UH | ≥1.14(11.4) | ≥10.5(836) | ≥25(1990) | 31～34(247～271) | √ | × | |
| KN35UH | ≥1.18(11.8) | ≥10.8(860) | ≥25(1990) | 33～36(263～287) | √ | × | |
| KN38UH | ≥1.23(12.3) | ≥11.0(876) | ≥25(1990) | 36～39(287～310) | √ | × | |
| KN40UH | ≥1.26(12.6) | ≥11.4(910) | ≥25(1990) | 38～41(302～326) | √ | × | |
| KN42UH | ≥1.29(12.9) | ≥11.8(939) | ≥25(1990) | 40～43(318～342) | √ | × | |
| KN45UH | ≥1.33(13.3) | ≥11.8(939) | ≥24(1910) | 43～46(342～366) | √ | √ | |
| KN48UH | ≥1.37(13.7) | ≥11.8(939) | ≥24(1910) | 46～49(366～390) | √ | √ | |
| KN50UH | ≥1.39(13.9) | ≥11.5(915) | ≥24(1910) | 47～51(374～406) | √ | √ | |
| KN52UH | ≥1.42(14.2) | ≥10.8(860) | ≥24(1910) | 49～53(390～422) | √ | √ | |
| KN30EH | ≥1.08(10.8) | ≥10.0(796) | ≥30(2388) | 28～31(223～247) | √ | √ | |
| KN33EH | ≥1.13(11.3) | ≥10.5(836) | ≥30(2388) | 31～34(247～271) | √ | √ | |
| KN35EH | ≥1.17(11.7) | ≥10.8(860) | ≥30(2388) | 33～36(263～287) | √ | √ | |
| KN38EH | ≥1.22(12.2) | ≥11.0(876) | ≥30(2388) | 36～39(287～310) | √ | √ | |
| KN40EH | ≥1.25(12.5) | ≥11.0(876) | ≥29(2308) | 38～41(302～326) | √ | √ | |
| KN42EH | ≥1.28(12.8) | ≥10.0(796) | ≥29(2308) | 40～43(318～342) | √ | √ | |
| KN45EH | ≥1.33(13.3) | ≥11.8(939) | ≥29(2308) | 43～46(342～366) | √ | √ | |
| KN48EH | ≥1.37(13.7) | ≥11.8(939) | ≥29(2308) | 46～49(366～390) | √ | √ | |
| KN30TH | ≥1.08(10.8) | ≥10.0(796) | ≥35(2786) | 28～31(223～247) | √ | √ | |
| KN33TH | ≥1.13(11.3) | ≥10.5(836) | ≥35(2786) | 31～34(247～271) | √ | √ | |
| KN35TH | ≥1.17(11.7) | ≥10.8(860) | ≥35(2786) | 33～36(263～287) | √ | √ | |
| KN38TH | ≥1.22(12.2) | ≥11.0(876) | ≥34(2706) | 35～39(279～310) | √ | √ | |
| KN40TH | ≥1.25(12.5) | ≥10.5(836) | ≥34(2706) | 38～41(302～326) | √ | √ | |
| KN42TH | ≥1.28(12.8) | ≥10.0(796) | ≥34(2706) | 40～43(318～342) | √ | √ |
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Sintered NdFeB Permanent Magnetic Materials
Zhejiang Kaiven Magnet Co., Ltd is leading Neodymium Ring Magnet manufacturers and suppliers in China, The company's current production process of sintered NdFeB permanent magnet materials can be divided into two parts: the blank process (also known as the "front process" in the industry) and the finished product process (also known as the "post process" in the industry): the blank process is the praseodymium Neodymium metal, pure iron, ferroboron and other raw materials are used to make NdFeB blanks; the finished product process is to process NdFeB blanks by mechanical processing and surface treatment to obtain NdFeB magnets. We also OEM/ODM custom sintered NdFeB ring magnet. The specific production process flow chart is as follows:
Kaiven is committed to becoming a world-renowned supplier of permanent magnet material application solutions in the field of new generation consumer electronics and energy-saving home appliances. Welcome to visit our NdFeB ring magnet factory in China.
The company applies technologies such as casting columnar crystal growth control technology, grain refinement and micro-optimization technology, etc., and is committed to improving the consistency of powder and giving full play to the performance potential of rare earth. By improving the smelting microstructure, applying fine-grain technology, and optimizing the mixing process, etc., significantly improving the performance of NdFeB magnets.
The company has applied and improved low-oxygen magnet preparation technology and cold isostatic pressing technology, so that NdFeB magnets are in a low-oxygen state during the pressing process, and the preparation of molding blanks is continuously optimized, which effectively reduces the loss of rare earth. The application of low-temperature sintering heat treatment technology has further improved the sintering process. Adjusting the temperature to a suitable state can give full play to the performance of the formula. The representative products are high-performance N55 magnets prepared by low-oxygen technology and N38UH magnets produced by near-net molding technology.
In order to pursue the accurate precision of customer customization, the company applies high-performance ultra-thin small special-shaped permanent magnet preparation technology to carry out high-efficiency and low-loss precision machining of NdFeB blanks, breaking through the technical bottleneck of high-performance thin and small magnet processing difficulty, and Strictly control product appearance defects through intelligent image appearance automatic inspection technology to improve inspection efficiency and accuracy.
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Established in 1987. With advanced technology and strong R&D capabilities, Kaiven Magnet has grown into a leading ferrite magnets and neodymium magnets manufacturer and exporter in China.
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