Bonded Magnet for Motor

Bonded Magnet for Motor

Multi-Pole Magnetization Capability
Excellent Dimensional Accuracy
Corrosion Resistance

Bonded NdFeB Magnet for Motor

Bonded NdFeB magnets are an ideal magnetic solution for modern electric motors that require compact size, high efficiency, and precise magnetic performance. Manufactured by bonding neodymium-iron-boron magnetic powder compression molding, these magnets offer excellent dimensional accuracy, complex shape capability, and reliable magnetic properties.

Compared with conventional sintered magnets, bonded NdFeB magnets provide greater design flexibility and are especially suitable for motors with intricate rotor structures. Their ability to be molded into thin-wall rings, multi-pole structures, and integrated components makes them widely used in small and medium-sized motors across various industries.

Key Advantages

Flexible Design for Motor Rotors: Bonded NdFeB magnets can be molded into complex shapes such as thin rings, arc segments, and integrated rotor components, allowing optimized motor designs.
Multi-Pole Magnetization Capability: These magnets support precise multi-pole magnetization patterns, which are essential for high-performance brushless DC (BLDC) motors.
Excellent Dimensional Accuracy: Injection molding technology provides tight tolerances, ensuring consistent motor performance and smooth operation.
Light weight structure: Lower density compared with sintered magnets helps reduce rotor inertia and improve motor response and efficiency.
Corrosion Resistance: The special resin coating offers inherent resistance to corrosion and environmental exposure, often eliminating the need for additional coatings.

Applications

Brushless DC (BLDC) motors
Stepper motors
Cooling fan motors
Automotive auxiliary motors
Smart home appliance motors
Power tool motors
Office automation equipment

Customized Bonded NdFeB Magnet Solutions

We understand that every motor design has unique performance, size, and structural requirements. To meet these diverse needs, we provide comprehensive customized bonded NdFeB magnet solutions tailored to our customers’ specific applications. From the initial design stage to mass production, our engineering team works closely with customers to develop magnets that match the exact requirements of their motor systems. By optimizing material grade, geometry, and magnetization patterns, we help ensure the best balance between magnetic performance, efficiency, and cost.

Properties

Magnetic Properties of Normal Process Magnets

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Type	Grade	Remanence		Intrinsic Coercivity		Magnetic Coercivity		Max. Energy Product (BH)max		Max. Working Temperature
		Br		Hcj		Hcb		(BH)max		L/D=0.7
		T	KGs	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe	℃
N	N35	1.17~1.22	11.7~12.2	≥955	≥12	≥868	≥10.9	263~287	33~36	80
	N38	1.22~1.25	12.2~12.5	≥955	≥12	≥899	≥11.3	287~310	36~39
	N40	1.25~1.28	12.5~12.8	≥955	≥12	≥907	≥11.4	302~326	38~41
	N42	1.28~1.32	12.8~13.2	≥955	≥12	≥915	≥11.5	318~342	40~43
	N45	1.32~1.38	13.2~13.8	≥955	≥12	≥923	≥11.6	342~366	43~46
	N48	1.38~1.42	13.8~14.2	≥955	≥12	≥923	≥11.6	366~390	46~49
	N50	1.40~1.45	14.0~14.5	≥876	≥11	≥955	≥12	382~406	48~51
	N52	1.43~1.48	14.3~14.8	≥876	≥11	≥876	≥11	398~422	50~53
	N54	1.45~1.50	14.5~15.0	≥876	≥11	≥876	≥11	414~438	52~55
	N56	1.48~1.52	14.8~15.2	≥876	≥11	≥836	≥11	414~454	52~57
M	35M	1.17~1.22	11.7~12.2	≥1114	≥14	≥868	≥10.9	263~287	33~36	100
	38M	1.22~1.25	12.2~12.5	≥1114	≥14	≥899	≥11.3	287~310	36~39
	40M	1.25~1.28	12.5~12.8	≥1114	≥14	≥923	≥11.6	302~326	38~41
	42M	1.28~1.32	12.8~13.2	≥1114	≥14	≥955	≥12	318~342	40~43
	45M	1.32~1.38	13.2~13.8	≥1114	≥14	≥995	≥12.5	342~366	43~46
	48M	1.37~1.43	13.7~14.3	≥1114	≥14	≥1027	≥12.9	366~390	46~49
	50M	1.40~1.45	14.0~14.5	≥1114	≥14	≥1033	≥13	382~406	48~51
	52M	1.43~1.48	14.3~14.8	≥1114	≥14	≥1043	≥13.1	398~422	50~53
	54M	1.44~1.49	14.4~14.9	≥1114	≥14	≥1043	≥13.1	398~438	50~55
	56M	1.48~1.53	14.8~15.3	≥1114	≥14	≥1003	≥12.6	422~454	53~57
H	35H	1.17~1.22	11.7~12.2	≥1353	≥17	≥868	≥10.9	263~287	33~36	120
	38H	1.22~1.25	12.2~12.5	≥1353	≥17	≥899	≥11.3	287~310	36~39
	40H	1.25~1.28	12.5~12.8	≥1353	≥17	≥923	≥11.6	302~326	38~41
	42H	1.28~1.32	12.8~13.2	≥1353	≥17	≥955	≥12	318~342	40~43
	45H	1.32~1.37	13.2~13.7	≥1353	≥17	≥973	≥12.3	342~366	43~46
	48H	1.37~1.42	13.7~14.2	≥1353	≥17	≥995	≥12.5	366~390	46~49
	50H	1.40~1.45	14.0~14.5	≥1353	≥17	≥1003	≥12.6	382~406	48~51
	52H	1.42~1.48	14.2~14.8	≥1353	≥17	≥1035	≥13	390~422	49~53
	54H	1.45~1.51	14.5~15.1	≥1353	≥17	≥1035	≥13	406~438	51~55
SH	35SH	1.17~1.22	11.7~12.2	≥1592	≥20	≥876	≥11	263~287	33~36	150
	38SH	1.22~1.25	12.2~12.5	≥1592	≥20	≥907	≥11.4	287~310	36~39
	40SH	1.25~1.28	12.5~12.8	≥1592	≥20	≥939	≥11.8	302~326	38~41
	42SH	1.28~1.32	12.8~13.2	≥1592	≥20	≥963	≥12.1	318~342	40~43
	45SH	1.32~1.38	13.2~13.8	≥1592	≥20	≥979	≥12.3	342~366	43~46
	48SH	1.37~1.43	13.7~14.3	≥1592	≥20	≥1011	≥12.7	366~390	46~49
	50SH	1.39~1.44	13.9~14.4	≥1592	≥20	≥1043	≥13.1	366~406	46~51
UH	28UH	1.04~1.08	10.4~10.8	≥1990	≥25	≥764	≥9.6	207~231	26~29	180
	30UH	1.08~1.13	10.8~11.3	≥1990	≥25	≥812	≥10.2	223~247	28~31
	33UH	1.13~1.17	11.3~11.7	≥1990	≥25	≥852	≥10.7	247~271	31~34
	35UH	1.17~1.22	11.7~12.2	≥1990	≥25	≥860	≥10.8	263~287	33~36
	38UH	1.22~1.25	12.2~12.5	≥1990	≥25	≥890	≥11.3	287~310	36~39
	40UH	1.25~1.28	12.5~12.8	≥1990	≥25	≥939	≥11.8	302~326	38~41
	42UH	1.28~1.32	12.8~13.2	≥1990	≥25	≥963	≥12.1	318~342	40~43
	45UH	1.32~1.38	13.2~13.8	≥1990	≥25	≥979	≥12.3	342~366	43~46
EH	28EH	1.04~1.08	10.4~10.8	≥2388	≥30	≥780	≥9.8	207~231	26~29	200
	30EH	1.08~1.13	10.8~11.3	≥2388	≥30	≥812	≥10.2	223~247	28~31
	33EH	1.13~1.17	11.3~11.7	≥2388	≥30	≥836	≥10.5	247~271	31~34
	35EH	1.17~1.22	11.7~12.2	≥2388	≥30	≥876	≥11	263~287	33~36
	38EH	1.22~1.25	12.2~12.5	≥2388	≥30	≥899	≥11.3	287~310	36~39
	40EH	1.25~1.28	12.5~12.8	≥2388	≥30	≥923	≥11.6	302~326	38~41
	42EH	1.28~1.32	12.8~13.2	≥2388	≥30	≥931	≥11.7	318~342	40~43
AH	28AH	1.04~1.08	10.4~10.8	≥2624	≥33	≥787	≥9.9	207~231	26~29	230
	30AH	1.08~1.13	10.8~11.3	≥2624	≥33	≥819	≥10.3	223~247	28~31
	33AH	1.13~1.17	11.3~11.7	≥2624	≥33	≥843	≥10.6	247~271	31~34
	35AH	1.17~1.22	11.7~12.2	≥2624	≥33	≥876	≥11	263~287	33~36
	38AH	1.22~1.25	12.2~12.5	≥2624	≥33	≥896	≥11.3	287~310	36~39
	40AH	1.25~1.28	12.5~12.8	≥2624	≥33	≥923	≥11.6	302~326	38~41

Notes

* Ganci Materials can produce magnets of special performance according to customers’ requirements.

Magnetic Properties of Grain Boundary Diffusion Process Magnets

Grade	Remanence		Intrinsic Coercivity		Magnetic Coercivity		Max. Energy Product (BH)max		Max. Working Temperature
	Br		Hcj		Hcb		(BH)max		L/D=0.7
	T	KGs	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe	℃
G52H	1.41~1.47	14.1~14.7	≥1353	≥17	≥1050	≥13.2	398~422	50~53	≤120
G54H	1.45~1.48	14.5~14.8	≥1353	≥17	≥1090	≥13.7	406~438	51~55	≤120
G45SH	1.32~1.37	13.2~13.7	≥1592	≥20	≥1003	≥12.6	342~366	43~46	≤150
G48SH	1.37~1.43	13.7~14.3	≥1592	≥20	≥1035	≥13	366~390	46~49	≤150
G50SH	1.40~1.45	14.0~14.5	≥1592	≥20	≥1035	≥13	382~406	48~51	≤150
G52SH	1.43~1.45	14.3~14.5	≥1592	≥20	≥1050	≥13.2	406~430	51~54	≤150
G54SH	1.45~1.48	14.5~14.8	≥1592	≥20	≥1059	≥13.3	406~438	51~55	≤150
G40UH	1.26~1.31	12.6~13.1	≥1990	≥25	≥907	≥11.4	302~326	38~41	≤180
G42UH	1.28~1.34	12.8~13.4	≥1990	≥25	≥907	≥11.4	318~342	40~43	≤180
G45UH	1.30~1.36	13.0~13.6	≥1990	≥25	≥1003	≥12.6	342~366	43~46	≤180
G48UH	1.37~1.43	13.7~14.3	≥1990	≥25	≥1035	≥13	366~390	46~49	≤180
G50UH	1.40~1.45	14.0~14.5	≥1990	≥25	≥1035	≥13	382~406	48~51	≤180
G52UH	1.42~1.45	14.2~14.5	≥1990	≥25	≥1035	≥13	390~422	49~53	≤180
G38EH	1.22~1.27	12.2~12.7	≥2388	≥30	≥907	≥11.4	287~310	36~39	≤200
G40EH	1.26~1.31	12.6~13.1	≥2388	≥30	≥907	≥11.4	302~326	38~41	≤200
G42EH	1.28~1.32	12.8~13.2	≥2388	≥30	≥907	≥11.4	318~342	40~43	≤200
G45EH	1.30~1.36	13.0~13.6	≥2388	≥30	≥1003	≥12.6	342~366	43~46	≤200
G48EH	1.37~1.43	13.7~14.3	≥2388	≥30	≥1035	≥13	366~390	46~49	≤200
G50EH	1.39~1.44	13.9~14.4	≥2388	≥30	≥1043	≥13.1	374~406	47~51	≤200
G35AH	1.16~1.23	11.6~12.3	≥2786	≥35	≥812	≥10.2	263~287	33~36	≤220
G38AH	1.22~1.25	12.2~12.5	≥2786	≥35	≥907	≥11.4	287~310	36~39	≤220
G40AH	1.26~1.31	12.6~13.1	≥2786	≥35	≥907	≥11.4	302~326	38~41	≤220
G42AH	1.28~1.34	12.8~13.4	≥2786	≥35	≥907	≥11.4	318~342	40~43	≤220
G45AH	1.33~1.38	13.3~13.8	≥2786	≥35	≥1003	≥12.6	334~366	42~46	≤220

Product Dimension

Shape	Diagram	Dimension(mm）		Max. Dimension(mm）
Block		L	≤180	L	≤220
		W	≤120	W	≤150
		H	≤60	H	≤80
Cylinder		D	≤150	D	≤220
Cylinder		H	≤60	H	≤80
Ring		D	≤120	D	≤160
		d	≤80	d	≤100
		L	≤45	L	≤45
Segment		L	≤180	L	≤220
		W	≤120	W	≤150
		T	≤60	T	≤80
		α	0~180°

Surface Treatment

Coating type	Color	/µm Thickness	SST/h	PCT/h	Working Temp/°C	Performance
Zn	Blue/White	5-10	≥48h		<160°C	Good corrosion resistance
Color Zn	Multiple colors	5-10	≥72h		<160°C	Good corrosion resistance
NICUNI	Silver white	10-30	≥72h	≥96h	<200°C	Very good corrosion resistance, thermal resistance and moisture resistance
PVD Aluminum	Silver white	5-25	≥96h	≥240h	<390°C	Very good corrosion resistance, thermal resistance and moisture resistance
Phosphate	–	–	–	–	<250°C	Low corrosion resistance performance
Epoxy	Black/Grey	10-30	≥480h	≥96h	<180°C	Excellent corrosion resistance, non-conductive
Multi-layer coating	–	–	≥1000h	≥480h	–	Excellent corrosion resistance

Notes

This performance might vary according to different dimension of product.
Multi-layer coating is a combination of different type of coatings, and its color, thickness and working temperature might vary from different combinations.
PCT test conditions: 121 degrees Celsius, 100% humidity, 2atms.

Magnetization

Square Magnet Magnetization

Thickness Magnetization

Disc Magnet Magnetization

Thickness Magnetization

Arc Magnet Magnetization

Thickness Magnetization

Applications

Our multi-Section Arc Magnets are widely used across a broad range of applications, including：

Robot Application

Electric Motorcycle Application

Consuming Electronic Application

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