N40-N50 Neodymium Arc Magnets for DC Motor Permanent Rare Earth Magnets

Price Negotiable

Price: $0.50 - $200.00 / Piece

MOQ: 100 Piece/Pieces

Delivery Time: Negotiable

Brand: Great wall

Product Description

Professional Neodymium Arc Magnets for Electric Motor Rotors

Custom NdFeB Arc Magnets with High Magnetic Performance for Starter Motors

Engineered high-grade neodymium arc magnets featuring precise dimensional tolerance and uniform magnetic flux distribution, designed for reliable performance in DC electric motors and starter motor assemblies.

Product Overview

Neodymium arc magnets are high-performance rare-earth magnet solutions optimized for permanent magnet motor applications. Widely used in starter motors and DC electric motors, these curved magnet segments deliver exceptional magnetic strength, stable performance, and flexible design options to meet demanding industrial requirements.

Manufactured from premium NdFeB (Neodymium Iron Boron) material, these arc magnets are precision-cut to custom dimensions with tight tolerances as low as ±0.05mm. Protective coatings (Ni-Cu-Ni, epoxy, or custom plating) provide corrosion resistance, while customizable magnetization directions and pole patterns ensure seamless integration into various motor rotor designs. The arc geometry enables uniform magnetic field distribution, improving motor efficiency and reducing cogging torque.

Applications

Automotive & Starter Motor Applications

- Starter motor permanent magnet assemblies
- DC electric motor rotors
- Alternator and generator components
- Automotive auxiliary motor systems
- Motor drive and pump applications

Industrial & Commercial Applications

- Permanent magnet DC motors
- Industrial motor drives
- Compressor and pump motors
- Sensor and instrumentation components
- Custom motor and electronic equipment

Key Advantages

- High magnetic performance: Exceptional magnetic strength and energy product for compact, high-torque motor designs.
- Precision manufacturing: Custom sizes with tight dimensional tolerances down to ±0.05mm for perfect fit in rotor assemblies.
- Customizable specifications: Available in multiple grades (N40-N50), dimensions, and magnetization directions to match specific motor requirements.
- Reliable durability: Protective coatings provide corrosion resistance, ensuring long-term performance in various operating environments.
- Uniform flux distribution: Arc-shaped design delivers even magnetic field distribution, enhancing motor efficiency and reducing vibration.
- Cost-effective integration: Standard and custom configurations available, supporting both prototyping and high-volume production needs.
- Compliant quality: RoHS certified materials meet international environmental standards for global market use.
- Versatile application: Suitable for a wide range of starter motors, DC motors, and industrial equipment requiring strong permanent magnets.

Magnetic Performance

Item	Grade	Remanence;				Coercivity;		Coercivity Force;		Max BH Product;				Working
		Br				HcB		HcJ		(BH)max				Temp.
		KGs		T		KOe	KA/m	KOe	KA/m	MGOe		KJ/m		°C
		Max.	Min.	Max.	Min.	KOe	KA/m	KOe	KA/m	Max	Min.	Max.	Min.
N	N40	13.2	12.6	1.32	1.26	≥10.5	≥836	>=12	>=954	42	38	334	289	≤80
	N42	13.5	12.9	1.35	1.3	≥10.5	≥836	>=12	>=954	44	40	350	318	≤80
	N45	13.8	13.2	1.38	1.32	≥10.5	≥836	>=12	>=954	46	42	366	334	≤80
	N48	14.2	13.7	1.43	1.37	≥10.5	≥836	>=11	>=876	49	45	390	358	≤80
	N50	14.5	14.0	1.45	1.4	≥10.5	≥836	>=11	>=876	51	47	406	374	<=80
	N52	14.8	14.4	1.48	1.44	≥10.5	>=836	>=11	>=876	53	49	422	390	<=80
	N55	1.52	14.6	1.52	1.46	≥9.0	>=716	≥11.0	>=876	56	52	446	414	<=80
M	N38M	12.8	12.3	1.3	1.23	≥11.6	>=915	>=14	>=1114	40	36	318	287	<=100
	N40M	13.2	12.6	1.32	1.26	≥11.8	>=939	>=14	>=1114	42	38	334	289	<=100
	N42M	13.5	12.9	1.35	1.3	≥12.0	>=955	>=14	>=1114	44	40	350	318	<=100
	N45M	13.8	13.2	1.38	1.32	≥12.5	>=994	>=14	>=1114	46	42	366	334	<=100
	N48M	14.2	13.7	1.42	1.37	≥12.8	>=1018	>=14	>=1114	49	45	390	358	<=100
	N50M	14.5	14	1.45	1.4	≥13.0	>=1042	>=14	>=1114	51	47	406	374	<=100
	N52M	14.8	14.2	1.48	1.42	≥13.0	>=1035	>=14	>=1114	53	48.5	422	386	<=100
H	N35H	12.5	11.8	1.25	1.18	≥11.0	>=875	>=17	>=1353	37	33	295	263	<=120
	N38H	12.8	12.3	1.3	1.23	≥11.6	>=915	>=17	>=1353	40	36	318	287	<=120
	N41H	13.2	12.6	1.32	1.26	≥11.8	>=939	>=17	>=1274	42	38	334	302	<=120
	N44H	13.7	13	1.37	1.3	≥12.1	>=963	>=16	>=1274	45	41	358	326	<=120
	N46H	13.8	13.2	1.38	1.32	≥12.2	>=971	>=16	>=1274	47	43	374	342	<=120
	N48H	14.2	13.7	1.42	1.37	≥12.7	>=1011	>=16	>=1274	49	45	390	358	<=120
SH	N35SH	12.5	11.8	1.25	1.18	≥11.0	>=876	>=20	>=1592	37	33	295	263	<=150
	N39SH	13	12.3	1.3	1.23	≥11.6	>=923	>=20	>=1592	40	36	318	287	<=150
	N42SH	13.2	12.9	1.32	1.26	>=11.8	>=939	>=20	>=1592	42	38	334	302	<=150
	N44SH	13.7	13	1.37	1.3	>=12.1	>=963	>=20	>=1592	45	41	358	326	<=150
	N46SH	13.8	13.4	1.38	1.34	>=12.5	>=965	>=20	>=1592	47	43	374	342	<=150
UH	N33UH	12.2	11.4	1.22	1.14	>=10.7	>=851	>=25	>=1990	35	31	279	2247	<=180
	N35UH	12.5	11.8	1.25	1.18	>=11.0	>=875	>=25	>=1990	37	33	295	263	<=180
	N38UH	13	12.3	1.3	1.23	>=11.6	>=915	>=25	>=1990	40	36	318	287	<=180
	N40UH	13.2	12.6	1.32	1.26	>=10.5	>=836	>=25	>=1990	42	38	334	289	<=180
EH	N30EH	11.7	10.9	1.17	1.09	>=10.2	>=812	>=30	>=2388	32	28	255	223	<=200
	N33EH	12.2	11.4	1.22	1.14	>=10.7	>=851	>=30	>=2388	35	31	279	2247	<=200
	N35EH	12.5	11.8	1.25	1.18	>=11.0	>=875	>=30	>=2388	37	33	295	263	<=200
	N38EH	13	12.2	1.3	1.22	>=11.5	>=915	>=30	>=2387	40	36	318	287	<=200
AH	N28AH	11	10.4	1.1	1.04	>=9.70	>=772	>=35	>=2786	29	26	231	207	<=220
	N30AH	11.7	10.8	1.17	1.08	>=10.2	>=812	>=35	>=2786	32	28	255	223	<=220
	N33AH	12.2	11.4	1.22	1.14	>=10.7	>=851	>=35	>=2786	35	31	279	247	<=220
	N35AH	12.5	11.7	1.25	1.17	>=11.0	>=876	>=35	>=2386	37	33	295	263	<=220