Bonded Magnet for Encoder

Bonded Magnet for Encoder

High-Precision Multi-Pole Magnetization
Complex Shape Capability
Excellent Dimensional Accuracy

Bonded NdFeB Magnet for Encoder

Bonded NdFeB magnets are widely used in modern encoder systems due to their excellent magnetic stability, precise multi-pole magnetization capability, and flexible design options. Manufactured by bonding neodymium-iron-boron magnetic powder with a binder through compression molding, these magnets provide reliable magnetic fields that enable accurate motion and position detection.

Key Advantages

High-Precision Multi-Pole Magnetization: Bonded NdFeB magnets support finely controlled multi-pole magnetization, enabling high-resolution encoder signals for accurate position and speed detection.
Complex Shape Capability: Injection molding technology allows the production of thin ring magnets, discs, and customized geometries optimized for encoder assemblies.
Excellent Dimensional Accuracy: High molding precision ensures consistent pole spacing and reliable signal stability in encoder systems.
Stable Magnetic Performance: Strong and uniform magnetic fields provide reliable sensor feedback and improve the overall accuracy of encoder measurements.

Applications

Rotary magnetic encoders
Linear encoders
Motor feedback systems
Industrial automation equipment
Robotics and motion control systems
Automotive steering and position detection systems

Customized Services for Encoder Magnets

We understand that encoder systems often require highly specialized magnetic components to achieve precise signal output and reliable performance. To support the diverse needs of encoder manufacturers, we provide comprehensive customized bonded NdFeB magnet solutions tailored to each specific application.

Customized Magnet Geometry
High-Precision Multi-Pole Magnetization
Material and Performance Optimization
Prototype Development and Design Support
Stable High-Volume Manufacturing

Through flexible customization capabilities, strong engineering expertise, and reliable manufacturing processes, we help customers develop high-performance encoder magnets that enhance signal accuracy, improve system reliability, and support next-generation motion control technologies.

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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