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Neodymium Disc Magnets: Ideal for high-performance applications in a small form factor

Neodymium disc magnets are a type of rare-earth magnet known for their exceptional strength and compact size. Made from an alloy of neodymium, iron, and boron (NdFeB), neodymium disc magnet are widely used in applications where high performance is required in a small form factor. Their disc shape makes them ideal for use in electronics, sensors, medical devices, and various industrial applications.

At Zoyn, we provide high-quality neodymium disc magnets tailored to meet the specific needs of industries such as automotive, healthcare, industrial automation, and renewable energy. Our magnets are available in a range of sizes, coatings, and magnetic grades to ensure optimal performance and durability in even the most demanding applications.

Key features of neodymium disc magnets include

1. High Magnetic Strength

They are the strongest commercially available magnets, providing a powerful magnetic field in a compact size.

2. Versatility

Neodymium disc magnet are available in various sizes and coatings (e.g., nickel, zinc, or epoxy) to suit different environments and applications.

3. Durability

With proper coating, neodymium disc magnet are resistant to corrosion and wear, ensuring long-lasting performance. Neodymium disc magnet are perfect for precision engineering, DIY projects, or even creative applications like crafts and magnetic closures. Whether in advanced technologies or everyday use, neodymium disc magnets combine strength, reliability, and convenience.

Magnetic Properties

Grade	Br				HcB		Hcj		(BH) max				Recommend Maximum Working Temp
	kGs		T		kOe	kA/m	kOe	kA/m	MGOe		kJ/m³		L/D≥0.7
	Max	Min	Max	Min	Min	Min	Min	Min	Max	Min	Max	Min	°C
N30	11.2	10.8	1.12	1.08	≥10	≥796	≥12	≥955	31	28	247	223	≤80
N33	11.7	11.3	1.17	1.13	≥10.5	≥836	≥12	≥955	34	31	271	247	≤80
N35	12.1	11.7	1.21	1.17	≥10.9	≥868	≥12	≥955	36	33	287	263	≤80
N38	12.6	12.2	1.26	1.22	≥11.3	≥899	≥12	≥955	39	36	311	287	≤80
N40	12.9	12.6	1.29	1.26	≥11.6	≥923	≥12	≥955	41	38	327	302	≤80
N42	13.2	12.9	1.32	1.29	≥12	≥955	≥12	≥955	43	40	342	318	≤80
N45	13.7	13.3	1.37	1.33	≥12.5	≥955	≥12	≥955	46	43	366	342	≤80
N48	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥12	≥955	49	46	390	366	≤80
N50	14.3	14.0	1.43	1.40	≥13.1	≥1043	≥12	≥955	51	48	406	382	≤80
N52	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥11	≥876	53	50	422	398	≤70
N54	14.6	14.4	1.46	1.44	≥13.6	≥1150	≥11	≥876	55	52	438	414	≤70
N56	14.8	14.6	1.48	1.46	≥13.7	≥1160	≥11	≥876	57	54	454	430	≤70
30M	11.2	10.8	1.12	1.08	≥10.9	≥868	≥14	≥1114	31	28	247	223	≤100
33M	11.7	11.3	1.17	1.13	≥10.5	≥836	≥14	≥1114	34	31	271	247	≤100
35M	12.1	11.7	1.21	1.17	≥10.9	≥868	≥14	≥1114	36	33	287	263	≤100
38M	12.6	12.2	1.26	1.22	≥11.3	≥899	≥14	≥1114	39	36	311	287	≤100
40M	12.9	12.6	1.29	1.26	≥11.6	≥923	≥14	≥1114	41	38	327	302	≤100
42M	13.2	12.9	1.32	1.29	≥12.0	≥955	≥14	≥1114	43	40	342	318	≤100
45M	13.7	13.3	1.37	1.33	≥12.5	≥995	≥14	≥1114	46	43	366	342	≤100
48M	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥14	≥1114	49	46	390	366	≤100
50M	14.3	14.0	1.43	1.40	≥13.1	≥1043	≥14	≥1114	51	48	406	382	≤100
52M	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥14	≥1114	53	50	422	398	≤100
54M	14.6	14.4	1.46	1.44	≥13.6	≥1150	≥14	≥1114	55	52	438	414	≤100
30H	11.2	10.8	1.12	1.08	≥10	≥796	≥17	≥1353	31	28	247	223	≤120
33H	11.7	11.3	1.17	1.13	≥10.5	≥836	≥17	≥1353	34	31	271	247	≤120
35H	12.1	11.7	1.21	1.17	≥10.9	≥868	≥17	≥1353	36	33	287	263	≤120
38H	12.6	12.2	1.26	1.22	≥11.3	≥899	≥17	≥1353	39	36	311	287	≤120
40H	12.9	12.6	1.29	1.26	≥11.6	≥923	≥17	≥1353	41	38	327	302	≤120
42H	13.2	12.9	1.32	1.29	≥12.0	≥955	≥17	≥1353	43	40	342	318	≤120
45H	13.7	13.3	1.37	1.33	≥12.5	≥995	≥17	≥1353	46	43	366	342	≤120
48H	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥17	≥1353	49	46	390	366	≤120
50H	14.3	14.0	1.43	1.40	≥13.0	≥1034	≥17	≥1350	51	48	406	382	≤120
52H	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥17	≥1350	53	50	422	398	≤120
30SH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥20	≥1592	31	28	247	223	≤150
33SH	11.7	11.3	1.17	1.13	≥10.6	≥844	≥20	≥1592	34	31	271	247	≤150
35SH	12.1	11.7	1.21	1.17	≥11.0	≥876	≥20	≥1592	36	33	287	263	≤150
38SH	12.6	12.2	1.26	1.22	≥11.4	≥907	≥20	≥1592	39	36	311	287	≤150
40SH	12.9	12.6	1.29	1.26	≥11.6	≥939	≥20	≥1592	41	38	326	302	≤150
42SH	13.2	12.9	1.32	1.29	≥12.4	≥987	≥20	≥1592	43	40	342	318	≤150
45SH	13.7	13.2	1.37	1.32	≥12.6	≥1003	≥20	≥1592	46	42	366	334	≤150
48SH	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥20	≥1592	49	46	390	366	≤150
50SH	14.3	14.0	1.43	1.40	≥13.0	≥1034	≥20	≥1592	51	48	406	382	≤150
52SH	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥20	≥1592	53	50	422	398	≤150
28UH	10.8	10.4	1.08	1.04	≥9.6	≥764	≥25	≥1989	29	26	231	207	≤180
30UH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥25	≥1989	31	28	247	223	≤180
33UH	11.7	11.3	1.17	1.13	≥10.7	≥852	≥25	≥1989	34	31	271	247	≤180
35UH	12.1	11.7	1.21	1.17	≥10.8	≥860	≥25	≥1989	36	33	287	263	≤180
38UH	12.6	12.2	1.26	1.22	≥11.3	≥899	≥25	≥1989	39	36	311	287	≤180
40UH	12.9	12.6	1.29	1.26	≥11.3	≥899	≥25	≥1989	41	38	326	302	≤180
42UH	13.2	12.9	1.32	1.29	≥11.6	≥923	≥25	≥1989	43	40	342	318	≤180
45UH	13.7	13.3	1.37	1.33	≥12.5	≥995	≥25	≥1989	46	43	366	342	≤180
28EH	10.8	10.3	1.08	1.03	≥9.8	≥780	≥30	≥2388	29	26	231	207	≤200
30EH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥30	≥2388	31	28	247	223	≤200
33EH	11.7	11.3	1.17	1.13	≥10.3	≥820	≥30	≥2388	34	31	271	247	≤200
35EH	12.1	11.7	1.21	1.17	≥10.5	≥836	≥30	≥2388	36	33	287	263	≤200
38EH	12.6	12.2	1.26	1.22	≥11.3	≥899	≥30	≥2388	39	36	311	287	≤200
40EH	12.9	12.5	1.29	1.25	≥11.3	≥899	≥30	≥2388	41	38	326	302	≤200
42EH	13.3	12.8	1.33	1.28	≥11.6	≥923	≥30	≥2388	43	40	342	318	≤200
45EH	13.7	13.2	1.37	1.32	≥12.5	≥995	≥30	≥2388	46	42	366	334	≤200
28AH	10.8	10.3	1.08	1.03	≥9.6	≥764	≥35	≥2785	29	26	231	207	≤230
30AH	11.2	10.8	1.12	1.08	≥9.6	≥764	≥35	≥2785	31	28	247	223	≤230
33AH	11.7	11.3	1.17	1.13	≥9.6	≥764	≥35	≥2785	34	31	271	247	≤230
35AH	12.1	11.7	1.21	1.17	≥9.6	≥764	≥35	≥2785	36	33	287	263	≤230
38AH	12.6	12.2	1.26	1.22	≥9.6	≥764	≥35	≥2785	39	35	311	278	≤230

Surface Coating Solution

Note: Corrosion Resistance varies with the shape of the product.

Coating Material	Thickness	Behaviour	Corrosion Resistance					Remark
Coating Material	Thickness	Behaviour	PCT	Salt Spray	Humidity & Temperature	Acid / Alkaline	Oil	Remark
Zn (White Zn)	≥ 5 µm	White	-----	♦♦	♦♦♦	-----	♦
Zn (Color Plated ZN)	≥ 5 µm	Iridescence	-----	♦♦♦	♦♦♦♦	-----	♦
Ni+Cu+Ni	≥ 15 µm	Sliver	♦♦♦	♦♦♦♦	♦♦♦♦♦	♦♦♦	♦♦♦
Ni+Cu+Ni+Sn	≥ 15 µm	Sliver	♦♦♦♦	♦♦♦♦	♦♦♦♦♦	-----	-----	Excellent performance in welding
Chemic Ni	≥ 5 µm	Sliver	♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦	♦♦♦
Epoxy	≥ 12 µm	Black or Grey	♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦	Poor wear resistance
Passivated	≤ 2 µm	Black or Grey	-----	-----	♦♦♦	-----	♦♦♦
Al	≥ 3 µm	Sliver Grey	♦♦♦♦	♦♦♦	♦♦♦♦	-----	♦♦♦	High performance in glue binding
Al+Epoxy	≥ 15 µm	Black or Grey	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	Poor wear resistance
Zn+Al	≥ 10 µm	Sliver or Sliver Grey	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	-----	♦♦♦♦♦
Everluber	≥ 5 µm	Gold	♦♦♦♦	♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦
Teflon	≥ 5 µm	Black	♦♦	♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦	Good wear resistance

Process Flow

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Neodymium Ring Magnet

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