Ring Magnet

High Performance
Uniform Magnetic Field Distribution
Multi-pole magnetization is available

High-Performance Permanent Ring Magnets for Motors and Industrial Applications

Ganci has a wealth of experience in ring magnets and can produce a variety of magnet rings. Customized magnet rings are produced according to customers’ drawings and specification.

Magnet rings are circular permanent magnets with a central hole, designed to provide symmetrical magnetic fields and efficient magnetic flux distribution. Ring magnets are widely used in electric motors, sensors, coupling systems, and precision industrial equipment.

Our magnets rings have stable magnetic performance, compact structure, and flexible magnetization options, and are essential components in motors and magnetic system design.

Key Advantages

Uniform Magnetic Field Distribution
High Efficiency & Compact Design
Multiple Magnetization Options
Ring magnets can be magnetized in different patterns to meet application requirements:
- Axial magnetization
- Radial magnetization
- Multi-pole magnetization

Applications

Ring magnets are widely used in:

Permanent magnet motors and generators
Magnetic couplings and bearings
Sensors and encoders
Loudspeakers and audio systems
Medical devices and precision instruments

They are especially suitable for applications requiring stable magnetic fields, precise alignment, and compact structures.

Custom Manufacturing

Ganci offers customized ring magnets with:

Outer and inner diameter customization
Thickness and tolerance control
Magnetization direction and pole configuration
Material grade and surface coating selection

Each ring magnet undergoes strict quality control, including dimensional inspection and magnetic performance testing, ensuring consistent quality and reliable performance.

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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