High - Quality Rare - Earth Permanent Sintered NdFeB Small Magnet Rings with Radial Orientation Design, Customized Industrial - Grade Products with Surface Coat

• Customization: Available
• Application: Electronic Products, Industrial Magnet, Motor Magnet
• Shape: Rectangular
• Model NO.: N30~N42, N45, N48, N50, N52, N55
• Coating: Ni, Zn, Expory
• Grade: N30~N42, N45, N48, N50, N52, N55
• Clolor: Silver Nickel, Blue Zn, Black Epoxy
• Characteristic 1: High Coercivity (Hcj)
• Characteristic 2: High Temperature Resistance
• Characteristic 3: Good Corrosion Resistance
• Characteristic 4: Easy Installation
• Quality Management System: IATF 16949:2016; 1s0 9001: 2015
• Occupational Health and Safety: ISO 45001:2018
• Transport Package: Cartons/Cases/Pallets for Air/Sea/Courier Express
• Specification: Customized, D-d*H, e. g., D50-d30*10mm
• Trademark: ZHAOBAO MAGNET
• Origin: China
• HS Code: 8505111000
• Production Capacity: 5, 000, 000PCS/Month
• Package Size: 38.00cm * 28.00cm * 15.00cm
• Package Gross Weight: 1.000kg

Product Description

Performance Unit NO. Grade		Remanence Br				Hcb				Hcj		Maximum Magnetic Energy Product (BH)max				Operating Temperature
		kGs		T		kOe		kA/m		kOe	kA/m	MGOe		kJ/m^3		B/μ0H
		Standard	Min	Standard	Min	Standard	Min	Standard	Min			Standard	Min	Standard	Min	ºC
01	N30	10.9	10.6	1.09	1.06	10.5	10.0	836	796	≥12	≥955	31	28	247	223	≤80
02	N35	12.0	11.7	1.20	1.17	11.3	10.8	900	860	≥12	≥955	35	33	279	263	≤80
03	N38	12.6	12.2	1.26	1.22	11.5	11.3	915	899	≥12	≥955	38	36	303	287	≤80
04	N40	12.9	12.6	1.29	1.26	11.6	11.4	924	907	≥12	≥955	40	38	318	303	≤80
05	N42	13.1	12.9	1.31	1.29	11.8	11.5	939	915	≥12	≥955	42	40	342	326	≤80
06	N45	13.6	13.3	1.36	1.33	12.0	11.6	955	923	≥12	≥955	45	43	358	342	≤80
07	N48	14.0	13.8	1.40	1.38	10.8	10.2	860	812	≥12	≥955	48	46	383	367	≤80
08	N50	14.3	14.1	1.43	1.41	10.8	10.0	860	796	≥12	≥955	50	48	398	383	≤80
09	N52	14.6	14.3	1.46	1.43	10.8	10.0	860	796	≥12	≥955	53	50	422	398	≤80
10	N54	14.8	14.5	1.48	1.45	10.8	10.5	860	836	≥11	≥876	54	51	438	406	≤80
11	N55	14.7	14.4	1.47	1.44	10.8	10.0	860	794	≥11	≥875	55	53	438	422	≤80
12	N56	14.9	14.7	1.49	1.47	10.8	10.5	860	836	≥10.5	≥836	55	52	430	414	≤80
13	N30M	11.2	10.8	1.12	1.08	10.5	10.0	836	796	≥14	≥1114	30	28	239	223	≤100
14	N35M	12.0	11.7	1.20	1.17	11.3	10.8	900	860	≥14	≥1114	35	33	279	263	≤100
15	N38M	12.6	12.2	1.26	1.22	11.8	11.3	939	860	≥14	≥1114	38	36	303	287	≤100
16	N40M	12.9	12.6	1.29	1.26	12.0	11.4	955	907	≥14	≥1114	40	38	318	303	≤100
17	N42M	13.2	12.9	1.32	1.29	12.4	11.5	987	915	≥14	≥1114	42	40	342	326	≤100
18	N45M	13.5	13.3	1.35	1.33	12.6	11.6	1003	923	≥14	≥1114	45	43	358	342	≤100
19	N48M	14.0	13.7	1.40	1.37	13.3	10.2	1059	812	≥14	≥1114	48	46	383	367	≤100
20	N50M	14.3	13.9	1.43	1.39	13.5	10.0	1074	796	≥14	≥1114	50	48	398	383	≤100
21	N52M	14.6	14.3	1.46	1.43	13.6	10.0	1082	796	≥14	≥1114	53	50	422	398	≤100
22	N54M	14.7	14.4	1.47	1.44	13.7	12.0	1090	955	≥13	≥1035	54	51	438	406	≤100
23	N30H	11.2	10.8	1.12	1.08	10.5	10.0	836	796	≥17	≥1353	30	28	239	223	≤120
24	N33H	11.7	11.4	1.17	1.14	11.0	10.8	876	860	≥17	≥1353	33	31	263	247	≤120
25	N35H	12.0	11.7	1.20	1.17	11.3	10.8	900	860	≥17	≥1353	35	33	279	263	≤120
26	N38H	12.6	12.2	1.26	1.22	11.8	11.3	939	899	≥17	≥1353	38	36	303	287	≤120
27	N40H	12.8	12.6	1.28	1.26	12.0	11.4	955	907	≥17	≥1353	40	38	318	303	≤120
28	N42H	13.0	12.8	1.30	1.28	12.4	11.5	987	915	≥17	≥1353	42	40	342	326	≤120
29	N45H	13.8	13.4	1.38	1.34	12.6	11.6	1003	923	≥17	≥1353	45	43	358	342	≤120
30	N48H	14.1	13.8	1.41	1.38	13.3	10.2	1059	812	≥17	≥1353	49	46	390	366	≤120
31	N50H	14.4	14.0	1.44	1.40	13.5	10.0	1074	796	≥17	≥1353	51	48	406	382	≤120
32	N52H	14.6	14.3	1.46	1.43	13.6	10.0	1082	796	≥17	≥1353	53	50	422	398	≤120
33	N54H	14.7	14.4	1.47	1.44	13.7	10.0	1090	796	≥16	≥1274	54	51	438	406	≤120
34	N30SH	11.2	10.8	1.12	1.08	10.5	10.0	836	796	≥20	≥1592	30	28	239	223	≤150
35	N33SH	11.7	11.4	1.17	1.14	11.0	10.8	876	860	≥20	≥1592	33	31	263	247	≤150
36	N35SH	12.0	11.7	1.20	1.17	11.3	11.1	900	884	≥20	≥1592	35	33	279	263	≤150
37	N37SH	12.3	12.0	1.23	1.20	11.5	11.1	915	884	≥20	≥1592	37	35	295	279	≤150
38	N38SH	12.5	12.2	1.25	1.22	11.8	11.3	939	899	≥20	≥1592	38	36	303	287	≤150
39	N40SH	12.7	12.5	1.27	1.25	12.1	11.4	963	907	≥20	≥1592	40	38	318	303	≤150
40	N42SH	13.0	12.8	1.30	1.28	12.4	11.5	987	915	≥20	≥1592	42	40	342	326	≤150
41	N45SH	13.7	13.4	1.37	1.34	12.6	11.6	1003	923	≥20	≥1592	46	43	362	342	≤150
42	N48SH	14.1	13.8	1.41	1.38	13.3	10.2	1059	812	≥20	≥1592	49	46	386	366	≤150
43	N50SH	14.3	13.9	1.43	1.39	13.5	10.0	1074	796	≥20	≥1552	51	48	402	382	≤150
44	N52SH	14.5	14.2	1.45	1.42	13.6	11.8	1081	939	≥19.5	≥1552	53	50	422	398	≤150
45	N54SH	14.7	14.3	1.47	1.43	13.7	11.8	1092	939	≥19.5	≥1552	54	51	438	406	≤150
46	N25UH	10.0	9.6	1.00	0.96	9.6	9.2	764	732	≥25	≥1990	25	22	199	175	≤180
47	N28UH	11.1	10.6	1.11	1.06	10.2	9.8	812	780	≥25	≥1990	29	26	231	207	≤180
48	N30UH	11.4	11.0	1.14	1.10	10.6	10.1	844	796	≥25	≥1990	32	30	255	235	≤180
49	N33UH	11.8	11.5	1.18	1.15	11.0	10.6	876	860	≥25	≥1990	35	33	275	259	≤180
50	N35UH	12.3	11.9	1.23	1.19	11.3	11.0	900	860	≥25	≥1990	37	35	295	279	≤180
51	N38UH	12.6	12.3	1.26	1.23	11.8	11.4	939	899	≥25	≥1990	39	37	310	291	≤180
52	N40UH	12.9	12.6	1.29	1.26	12.2	11.8	971	907	≥25	≥1990	41	39	322	310	≤180
53	N42UH	13.2	12.8	1.32	1.28	12.4	12.0	987	915	≥25	≥1990	43	40	338	318	≤180
54	N45UH	13.7	13.3	1.37	1.33	12.6	12.2	1003	923	≥25	≥1990	46	43	362	342	≤180
55	N48UH	14.0	13.7	1.40	1.37	13.3	12.9	1059	812	≥24	≥1910	48	46	383	367	≤180
56	N50UH	14.2	13.9	1.42	1.39	13.5	13.1	1074	796	≥24	≥1910	50	48	398	383	≤180
57	N52UH	14.4	14.1	1.44	1.41	13.8	11.8	1080	939	≥24	≥1910	53	50	422	398	≤180
58	N54UH	14.7	14.3	1.47	1.43	14.1	11.8	1091	939	≥24	≥1910	54	51	438	406	≤180
59	N28EH	10.8	10.4	1.08	1.04	10.4	9.5	811	756	≥30	≥2388	28	26	223	207	≤200
60	N30EH	11.5	11.0	1.15	1.10	10.6	10.0	844	796	≥30	≥2388	32	30	255	235	≤200
61	N33EH	11.8	11.5	1.18	1.15	11.0	10.8	876	860	≥30	≥2388	35	33	275	259	≤200
62	N35EH	12.3	11.9	1.23	1.19	11.3	10.8	900	860	≥30	≥2388	37	35	295	279	≤200
63	N38EH	12.6	12.3	1.24	1.22	11.8	11.3	939	899	≥30	≥2388	39	37	310	291	≤200
64	N40EH	12.9	12.6	1.27	1.24	12.2	11.8	971	939	≥30	≥2388	41	39	322	310	≤200
65	N42EH	13.2	12.8	1.32	1.28	12.4	11.5	987	915	≥30	≥2388	43	40	338	318	≤200
66	N45EH	13.5	13.3	1.35	1.33	12.6	11.6	1003	923	≥29	≥2308.4	45	43	358	342	≤200
67	N48EH	14.0	13.7	1.40	1.37	13.3	10.2	1059	812	≥30	≥2388	48	46	383	367	≤200
68	N28AH	10.8	10.4	1.08	1.04	10.4	9.5	811	756	≥35	≥2786	28	26	223	207	≤220
69	N30AH	11.2	10.8	1.12	1.08	10.6	10.0	844	796	≥35	≥2786	30	28	239	223	≤220
70	N33AH	11.6	11.2	1.16	1.12	11.0	10.8	876	860	≥35	≥2786	33	31	263	247	≤220
71	N35AH	12.0	11.7	1.20	1.17	11.5	10.8	915	860	≥35	≥2786	35	33	279	263	≤220
72	N38AH	12.4	12.2	1.24	1.22	11.8	11.3	939	899	≥35	≥2786	37	35	294	279	≤220
73	N40AH	12.6	12.4	1.26	1.24	12.1	11.4	971	907	≥35	≥2786	39	37	310	295	≤220
74	N42AH	13.0	12.8	1.30	1.28	12.4	11.5	987	915	≥35	≥2786	42	40	334	318	≤220
75	N45AH	13.5	13.3	1.35	1.33	12.6	11.6	1003	923	≥35	≥2786	45	43	358	342	≤220
76	N28TH	10.8	10.4	1.08	1.04	10.4	9.2	811	732	≥40	≥3184	28	26	223	207	≤240
77	N30TH	11.2	10.8	1.12	1.08	10.6	10.0	844	796	≥40	≥3184	30	28	239	223	≤240
78	N33TH	11.5	11.3	1.15	1.13	11.0	10.8	876	860	≥40	≥3184	33	31	263	247	≤240
79	N35TH	11.9	11.7	1.19	1.17	11.5	10.8	915	860	≥40	≥3184	35	33	279	263	≤240
80	N38TH	12.4	12.2	1.24	1.22	11.8	11.3	939	899	≥40	≥3184	37	35	294	279	≤240
81	N40TH	12.7	12.4	1.27	1.24	12.1	11.4	971	907	≥40	≥3184	39	37	310	294	≤240
82	N42TH	13.0	12.7	1.30	1.27	12.4	11.4	982	907	≥40	≥3184	42	39	310	294	≤240
83	N28RH	10.8	10.4	1.08	1.04	10.4	9.2	811	732	≥45	≥3582	28	26	223	207	≤260
84	N30RH	11.2	10.8	1.12	1.08	10.6	10.0	844	796	≥45	≥3582	30	28	239	223	≤260
85	N33RH	11.5	11.3	1.15	1.13	11.0	10.8	876	860	≥45	≥3582	33	31	263	247	≤260
86	N35RH	11.9	11.7	1.19	1.17	11.5	10.8	915	860	≥45	≥3582	35	33	279	263	≤260
87	N38RH	12.3	12.0	1.23	1.20	12.0	10.8	980	860	≥45	≥3582	38	35	279	263	≤260
88	N40RH	12.6	12.3	1.26	1.23	12.6	10.8	1020	860	≥45	≥3582	40	37	279	263	≤260

Main Physical and Mechanical Properties of Sintered NdFeB Permanent Magnet Materials

Category	Parameter		Units	Reference Value
Mechanical and Physical Properties	Density		g / cm^3	7.40 - 7.70
	Vickers Hardness		HV	500 - 700
	Compressive Strength		MPa	1000 - 1100
	Tensile Strength		MPa	80 - 90
	Bending Strength		MPa	150 - 400
	Thermal Conductivity		W / (m•K)	8 - 10
	Young's Modulus		GPa	150 - 200
	Electrical Resistivity	C// (20ºC)	μΩ•m	1.4 - 1.6
		C⊥(20ºC)	μΩ•m	1.2 - 1.4
	Coefficient of Thermal Expansion	C// (20ºC - 100ºC)	10^-6/ K	4 - 9
		C⊥(20ºC - 100ºC)	10^-6/ K	-2 - 0
	Maximum Service Temperature	N grade	ºC	≤80
		M grade	ºC	≤100
		H grade	ºC	≤120
		SH grade	ºC	≤150
		UH grade	ºC	≤180
		EH grade	ºC	≤200
		TH grade	ºC	≤230
Note 1:  C// is the value measured in the easy magnetization direction,              C⊥is the value measured perpendicular to the easy magnetization direction. Note 2:  Maximum Service Temperature depends on magnet application design and specification.

Company Profile

ABOUT ZHAOBAO MAGNET
ZHAOBAO MAGNET, the leading magnet brand in China. Our annual production capacity is 8000 tons. Our team has been committing ourselves to developing and producing rare earth permanent magnets (NdFeB and SmCo) of high coercive force, low reversible temperature coefficient and low weight loss characteristics since 1998.
1) 20+ years' Permanent Magnet technology to support your applications and projects
2) The Strategic Partner to raw material (PrNd, DyFe, Tb...) suppliers, to assure the best cost control and stable price
3) 8000 tons annual capacity, 5000 tons annual output to guarantee stable supply
4) Production Time: 15 days for mass production (150+ kg), 7 days for samples
5) Price: 10%+ save. Sample price can be the same as mass-production price
6) We are a Permanent Magnet factory owns 20+ years' global service experience
7) On-site technical support 
 

Certifications

We own a complete production chain and perfect quality assurance system. We are an ISO 9001: 2015, IATF 16949:2016, ISO 14001:2015 & ISO 45001:2018, SA 8000 : 2014 certified company. 
 

Production Processes

Technology Introduction

  Demagnetization Curves   

Production &Testing Equipments

Products Application

95% of our magnets are used in Industrial Automation, Automotive Industry, Clean Energy and other High-end Applications, especially in energy-efficient permanent magnet motors and generators, such as Elevator Motor ( Escalator Motor, Gearless Traction Machine ), Servo Motor, New Energy Vehicles Drive Motor, Compressor Motor, High Speed Motor, Explosion-proof Motor, Wind Power Generators, Water Power Generators, Solar Pumps, Sensors, Magnetic Separator and other fields.

FAQ

  1. How long can I get a reply?

       You will receive our reply within 20 minutes during our work time 08:00-16:30(UTC-8)
       We will contact you as soon as we can if out of working time.

  2. How about your MOQ?

       ≥5pcs. The specific MOQ depends on different grades, size, item, design and process. Small quantity will also be accepted accordingly.

  3. Can I get free samples?

       For samples that do not need additional to make production tools. If necessary, we can provide free samples for your reference.

  4. What about the production time?

       7~15 days for customized samples, related cost according to your design.
      15~20 days for mass production (150+ kg).                                                                                                                     

  5. What information do I need to provide when I have an inquiry?

       Please let us know the inquiry details include: material grade, shape, dimension, quantity and drawing with magnetic properties, tolerance, surface coating, magnetized direction etc. Or other requirements, such as special packing, delivery time, price term (FOB, CIF, FCA......).

  6. Can you provide the related documents?

       We have relatively complete product certificates and documents. If necessary, we can provide as per your requirements, such as quality system certificates, insurance, certificate of original, product inspection report etc.

  7. Can you guarantee safe and secure shipping of products?

       Our products always use safe and high quality export packing. We usually use vacuum packing and iron shield packing by air to avoid  magnets demagnetization and use wooden pallet or wooden cases that are safe and environmental protection by sea.

  8. Could I visit your factory?

       You are welcome to our factory at any time and everything will be arranged well for your arrival.

  9. How can I compare the quality of different NdFeB magnets?

        Please consider factors such as the purity of the raw materials used, the manufacturing process, and the post-processing treatment. High-quality NdFeB magnets will have low levels of impurities and defects, and will be well-manufactured and finished to ensure good performance.

  10. How should I store NdFeB magnets?

        NdFeB magnets should be stored in a dry, cool place away from heat sources and other magnets. They should also be handled carefully to avoid damage, as they can be brittle and prone to cracking. It is also a good idea to store NdFeB magnets away from electronic devices, as the strong magnetic field of the magnets can interfere with their operation.

  11. Can you quote me your best price?

        NdFeB magnets can vary significantly in price, the cost be affected by more factors. But price is not always a good indicator of quality, so please believe that the most suitable is the best and we will try our efforts to quote the best price to meet your targets.