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Ring sintered NdFeB magnet

●Annular NdFeB magnets are generally circular and circular magnets, which are different from square magnets. Annular NdFeB magnets are commonly used in automobiles, molds, magnetic components, instruments, MP3, tablet computers, cameras, communication tools, home appliances, electroacoustics and other fields.Summit Magnetic has a strong voice in the field of electroacoustics, and is one of the suppliers of professional audio companies such as Harman Kardon, JBL, AKG, Infinity, etc.
●The Sintered NdFeB Magnet is powerful permanent magnet in modem times. It is not only has excellent properties such as high remanence, high coerce, high magnetic energy product .high performance price ratio and so on,but also is development of high-performance,miniaturized and lightweight replacement products.
●The consistency and stability of products between each orders, provides safeguard to our customers. For example, the consistency of (BH)max reaches 6o (Cpk1.67 or above).
●In order to raise working temperature of our products, Dingfeng Magnetics works hard to realize better high thermal stability and low thermal demagnetization, developed the series VH series products which can work at temperature higher than220℃.

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Description
Performance Parameter

Dimensional Range		Dimensional Tolerance	Planeness
Hole Dimension	D≤3	±0.04	0.06
	3<D≤6	±0.05	0.06
	6<D≤25	±0.05	0.1
	D≤25	±0.1	0.1
Thickness Dimension	T≤1	±0.04
	1<T≤3	±0.04
	T>3	±0.05

Product description:

country of origin	Zhejiang Jinhua
Brand name	Dingfeng
compound material	NdFeB magnet
shape	Ring/tile/round column/square/other
purpose	Industrial magnet
Tolerance	±0.1%
Processing services	bending/decoiling/cutting/punching/moulding
level	NdFeB magnet material No. (N/M/H/SH/UH/EH material)
grade BH	N28/N30/N35/N42/N48/N50
coating）	nickel/zinc/gold/silver/epoxy/passivated
Maximum operating temperature	200℃
quality system	ISO9001、IATF16949
certifications of magnet/environment）	ROHS/REACH
Delivery date	8-15 days (please consult the specific delivery time)
MOQ	2000PCS/PKG
throughput	100k PCS per DAY

Surface Treatment

Based on the production of high property magnetic material, Dingfeng actively researches and upgrades the techniques of superficial protection. We provide our customer high qualified Zink

coating. Tin coating, Nickel coating, electrophoresis, etc. They have excellent performance in the SST test to against humidity and temperature, which guarantee its application in harsh environment. During the production process, environmental protection is highlighted, and all the coating and platingconfirm to ROHS standard.

Serial Number	Type of Coating		Coating Thickness	Coating Color	PCT (Hour)	SST(Hour)
1	Zink	Zn.L	4-15μm	Blue & White	/	24
1	Zink	Zn.C	4-15μm	Multi-Colored	/	48
2	Nickel	NiCuNI	5-20μm	Bright Silver	48	48
2	Nickel	Ni+AP.Ni	3~20μm	Dark Silver	48	72
3		NiSn	5~20μm	Silver	96	72
4		NiAg	5~20μm	Silver	96	72
5		NiAu	5-20μm	Golden	96	72
6		Electrophoresis	20-30μm	Black, gray	/	>240

Sintered NdFeB Magnets

The Sintered NdFeB Magnet is powerful permanent magnet in modern times. It is not only has excellent properties such as high remanence, high coerce, high magnetic energy product, high performance price ratio and so on, but also is development of high-performance, miniaturized and lightweight replacement products.

High consistency

The consistency and stability of products between each orders, provides safeguard to our customers. For example, the consistency of (BH)max reaches 6σ (Cpk1.67 or above).

High Working Temperature

In order to raise working temperature of our products, Dingfeng Magnetics works hard to realize better high thermal stability and low thermal demagnetization, developed the series VH series products which can work at temperature higher than220C.

Performance Parameter

Grade	Remanence (Min)		Magnetic Induction Coercivity (Min)		Intrinsic Coercivity (Min)		Max Magnetic energy Product (Range)		Maximum Working Temperature
	BR		Hcb		Hcj		(BH)max		Maximum Working Temperature
	KGs	T	KGe	KA/m	KOe	KA/m	MGOe	KJ/m³	C°
N54	14.5	1.45	10.5	836	11	875	51-55	406-438	80
N52	14.2	1.42	10.5	836	12	960	49-53	390-422	80
N50	13.9	1.39	10.5	836	12	960	47-51	374-406	80
N48	13.7	1.37	10.5	836	12	960	45-A9	358-390	80
N45	13.3	1.33	10.8	860	12	960	43-46	342-366	80
N42	12.9	1.29	10.8	860	12	960	40-43	318-342	80
N40	12.6	1.26	10.8	860	12	960	38-41	302-326	80
N38	12.3	1.23	10.8	860	12	960	36-39	287-310	80
N35	11.8	1.18	10.8	860	12	960	33-36	263-287	80
N52M	14.2	1.42	12.5	995	13	1035	49-53	390-422	100
N50M	13.9	1.39	13.0	1035	14	1114	47-51	374-406	100
N48M	13.7	1.37	12.7	1012	14	1114	45-49	358-390	100
NA5M	13.3	1.33	12.2	971	14	1114	43-46	3A2-366	100
N42M	12.9	1.29	11.8	938	14	1114	40-43	318-342	100
N40M	12.6	1.26	11.4	910	14	1114	38-41	302-326	100
N38M	12.3	1.23	11.0	876	14	1114	36-39	287-310	100
N35M	11.8	1.18	10.8	860	14	1114	33-36	263-287	100
N50H	13.9	1.39	13.0	1035	16	1274	47-51	374-406	120
N48H	13.7	1.37	12.8	1000	16	1274	45-49	358-390	120
N45H	13.3	1.33	12.5	995	17	1353	43-46	342-366	120
N42H	12.9	1.29	12.0	957	17	1353	40-43	318-342	120
N40H	12.6	1.26	11.7	930	17	1353	38-41	302-326	120
N38H	12.3	1.23	11.4	910	17	1353	36-39	287-310	120
N35H	11.8	1.18	11.0	876	17	1353	33-36	263-287	120
N33H	11.4	1.14	10.6	844	17	1353	31-34	247-271	120
N48SH	13.7	1.37	12.8	1035	19	1512	45-49	358-390	150
N45SH	13.3	1.33	11.8	938	20	1592	43-46	342-366	150
N42SH	12.9	1.29	11.8	938	20	1592	40-43	318-342	150
N40SH	12.6	1.26	11.5	912	20	1592	38-41	302-326	150
N38SH	12.3	1.23	11.1	886	20	1592	36-39	287-310	150
N35SH	11.8	1.18	11.0	876	20	1592	33-36	263-287	150
N33SH	11.4	1.14	10.5	836	20	1592	31-34	247-271	150
N45UH	13.3	1.33	12.2	976	24	1911	43-46	342-366	180
N42UH	12.9	1.29	11.8	938	25	1990	40-43	318-342	180
N40UH	12.6	1.26	11.5	912	25	1990	38-41	302-326	180
N38UH	12.3	1.23	11.1	886	25	1990	36-39	287-310	180
N35UH	11.8	1.18	10.6	845	25	1990	33-36	263-287	180
N33UH	11.4	1.14	10.3	816	25	1990	31-34	247-271	180
N30UH	10.8	1.08	9.5	756	25	1990	28-31	223-247	180
N42EH	12.8	1.28	12.2	971	29	2308	39-43	310-342	200
N40EH	12.5	1.25	11.9	947	30	2388	37-41	295-326	200
N38EH	12.2	1.22	11.6	923	30	2388	35-39	279-310	200
N35EH	11.8	1.18	11.1	883	30	2388	33-36	263-287	200
N33EH	11.4	1.14	10.3	816	30	2388	31-34	247-271	200
N30EH	10.8	1.08	9.5	756	30	2388	28-31	223-247	200
N28EH	10.5	1.05	9.5	756	30	2388	26-29	207-231	200
N38TH	12.2	1.22	11.6	923	33	2627	35-39	279-310	230
N35TH	11.8	1.18	10.6	845	35	2786	33-36	263-287	230
N33TH	11.4	1.14	10.2	816	35	2786	31-34	247-271	230
N30TH	10.8	1.08	10.1	804	35	2786	28-31	223-247	230
N28TH	10.5	1.05	9.5	756	35	2786	26-29	207-231	230

Note :

1.The above-mentioned data of magnetic parameters and physical properties are given at room temperature.

2.The maximum service temperature of magnet is changeable due to the ratio of length and diameter, coating and environmental factors.

3.Density: 7.4-7.65g/cm3, Reversible Temperature Coefficient: ot-0.13--0.09%/"C; 0 -0.80--0.50%/°C ; Hardness: Hv600.

Technical Support

Dingfeng Magnet always adheres to the working style of "professional, responsible, efficient and innovative" and the business philosophy of "integrity and win-win".
Quality Guarantee

DingFeng after more than 20 years of technology accumulation and precipita-tion for the industry to improve performance cost reduction contributed to the strength of many years market.
Online Service

Experienced employees & experts are always at your service to provide you with satisfactory products & professional instruction on technical problem solutions.

ABOUT DINGFENG MAGNETS

Since in 2000, Dongyang Dingfeng Magnetic Materials Co., Ltd. was established in March 2000 and is located in Hengdian Town, which is known as “China Magnetic Capital” and “Oriental Hollywood”. It is famous China Ring sintered NdFeB magnet manufacturers and Ring sintered NdFeB magnet factory specializing in the research, development, production and operation of permanent magnet materials. high-tech enterprises. Now the main production and sales products are sintered NdFeB and permanent magnet ferrite and other materials.

Our wholesale Ring sintered NdFeB magnet are exported to the United States, Southeast Asia, Europe and other countries and regions. We are one of the professional suppliers of electroacoustic magnets in the world. Our products are also widely used in communication, permanent magnet motor, automobile and other fields, with a broad market and potential development prospects.

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What is Ring sintered NdFeB magnet

Ring sintered NdFeB magnet is a type of permanent magnet made of a combination of neodymium, iron, and boron, which are chemically abbreviated as NdFeB. These magnets are manufactured using a powder metallurgy technique called sintering, which involves compacting fine NdFeB powder into a desired shape under high heat and pressure. The resulting magnets are highly magnetic and have a high energy density, making them widely used in various applications, such as electric motors, hard disk drives, and speakers.

Ring sintered NdFeB magnets are specifically designed in the shape of a ring, which allows them to be easily integrated into different applications where a circular or cylindrical magnetic field is needed. They are commonly used in sensors, actuators, and magnetic bearings. The properties of these magnets can be customized by varying the manufacturing process and adjusting the composition of the NdFeB powder to meet specific requirements.

The main purpose of Ring sintered NdFeB magnet

The main purpose of ring sintered NdFeB magnet is to provide a strong, permanent magnetic field in a compact, efficient design. Because of their high magnetic strength, energy density, and resistance to demagnetization, these magnets are used in a wide range of applications, including:

1. Electric Motors: Ring sintered NdFeB magnets are used in electric motors to provide the necessary magnetic field for the motor to function. They are particularly suited for high-performance motors due to their high coercivity and resistance to demagnetization.

2. Magnetic Separators: Ring sintered NdFeB magnets are used in magnetic separators to separate and purify materials based on their magnetic properties.

3. Sensors and Actuators: Ring sintered NdFeB magnets are used in sensors and actuators to convert mechanical energy into electrical signals or vice versa.

4. Magnetic Bearings: Ring sintered NdFeB magnets are used in magnetic bearings to levitate and guide rotating machinery with high precision and low friction.

5. Loudspeakers: Ring sintered NdFeB magnets are used in the construction of loudspeakers to create a strong magnetic field that drives the speaker cone and produces sound.

Overall, the main purpose of ring sintered NdFeB magnets is to provide a strong, permanent magnetic field in a compact and efficient design, making them an essential component in a wide range of modern technologies.

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