Chongqing Great Wall Technology Co., Ltd. is one of the leading manufacturers and suppliers of neodymium cylinder magnet in China, also supports customized service. Welcome to wholesale high quality neodymium cylinder magnet for sale here from our factory.

Sintered NdFeB Magnet is the 3^rd generation of permanent magnet developed in 1980. It offers the strongest magnetic power today. With its excellent magnetic characteristics, neodymium magnet offers flexibility for new designs or is replacing older materials like AlNiCo and Ceramic in many applications, including high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors and loud-speakers etc.

Neodymium cylinder magnets are also known as neodymium rod magnets. They have straight parallel sides and a circular cross section, and are measured according to the Diameter (D) x Length (L). Neodymium (Neo or NdFeB) magnets are permanent magnets, and part of the rare-earth magnet family. Neodymium cylinder magnets have the highest magnetic properties and are the most powerful commercially available magnets today. Because of their magnetic strength, neodymium cylinder magnets are the preferred choice for many consumer, commercial and technical applications.

The higher L/D ratio enables the axially magnetized Neodymium cylinder magnets have higher gauss value and making it well suitable for activating hall sensor and reed switch. In addition, Neodymium cylinder magnet with higher L/D ratio can also generate much stronger pull force from the relatively small magnetic pole area and exhibit superior temperature stability. Other representative application of Neodymium cylinder magnet includes magnetic bead separation rack and some holding applications.

The Manufacturing Process of Neodymium Magnets

A powder metallurgy process is used in producing sintered Nd-Fe-B magnets.

001-Process Flow

Drawing of NdFeB Cylinder Magnet

003-Drawing of Neodymium Cylinder Magnet

Dimensions For Some Models

Shape	Diameter(mm)	Height(mm)	Shape	Diameter(mm)	Height(mm)
Cylinder	1	5	Cylinder	7	25
Cylinder	1.4	5	Cylinder	7	30
Cylinder	1.5	8	Cylinder	8	40
Cylinder	2	5.5	Cylinder	9	25
Cylinder	2	7	Cylinder	9	40
Cylinder	2.3	4.5	Cylinder	10	30
Cylinder	2.5	6	Cylinder	10	40
Cylinder	3	5	Cylinder	10	50
Cylinder	3	6	Cylinder	12	30
Cylinder	3	10	Cylinder	12	50
Cylinder	3	45	Cylinder	15	50
Cylinder	3.8	50	Cylinder	16	30
Cylinder	5	8	Cylinder	17.5	20
Cylinder	5	10	Cylinder	19	40
Cylinder	6	23	Cylinder	22.5	25
Cylinder	6	30	Cylinder	23.5	25
Cylinder	6	40	Cylinder	...

Magnetic Orientation of Neodymium Cylinder Magnet

002-Magnetic Orientation of Neodymium Cylinder Magnet

Surface Treatment

Surface	Coating	Thickness(μm)	Color	SST(Hrs)	Characteristic
Zinc	Zn	4-10	Blue White	24-48	Regular Protection
Zinc	Colored Zn	4-10	Colorful	48-72	Excellent against Humidity
Nickel	Ni-Ni	8-15	Silver	48-96	Regular Protection
Nickel	NiCuNi	10-20	Silver	24-72	Excellent against Humidity
Epoxy	Ni-Cu-Epoxy	10-20	Black/Grey	72-108	Excellent against Humidity
	Ni-Cu-Ni-Epoxy	10-30		72-108	Excellent against Humidity
	Epoxy	10-30		>500	Excellent against Humidity
Teflon	Teflon	10-20	Black	48-72	Excellent against Humidity, Superior againt solvents, gases, fungi and bacterial.
Passivation	Phosphated/Passivated	≤2	Dark Grey	≤2.5	Temperary Protection
Gold	Ni-Cu-Ni-Au	10-20	Golden	>12	Regular Protection
Everlube	Everlube	10-25	Yellow	>48	Non-conducting, excellent adhesion
Everlube	Ni-Cu-Everlube	10-25	Yellow	>96	Excellent adhesion
PVD Aluminum	PVD Aluminum	5-30	Silver	>72	Excellent adhesion strength>15mPa
Parylene	Parylene	5-15	Grey	>48	Excellent against Humidity, Superior againt solvents, gases, fungi and bacterial.

Note: Salt Spray Condition:
Concentration of Sodium Chloride	5%
Test Temperature:	35°C
Temperature of Pressure Barrel:	47°C
Relative Humidity of Laboratory:	85%
Spraying Volume:	1.5±0.5ml/(h.80cm³)

Magnetic Properties

Item	Grade	Br		Hcb		HcJ		(BH)max		Working Temperature
Item	Grade	kGs	T	kA/m	kOe	kA/m	kOe	MGOe	kJ/m³	L/D≥0.7(℃)
N	N35	11.7-12.2	1.17-1.22	≥10.9	≥868	≥12	≥955	33-36	263-287	≤80
	N38	12.2-12.5	1.22-1.25	≥11.3	≥899	≥12	≥960	36-39	287-310
	N40	12.5-12.8	1.25-1.28	≥11.4	≥907	≥12	≥960	38-41	302-326
	N42	12.8-13.2	1.28-1.32	≥11.5	≥915	≥12	≥960	40-43	318-342
	N45	13.2-13.8	1.32-1.38	≥11.6	≥923	≥12	≥960	43-46	342-366
	N48	13.8-14.2	1.38-1.42	≥11.6	≥923	≥12	≥960	46-49	366-390
	N50	14.0-14.5	1.40-1.45	≥12.0	≥955	≥12	≥960	48-51	382-406
	N52	14.3-14.6	1.43-1.46	≥11.0	≥876	≥12	≥960	50-53	398-422
	N55	14.5-15.0	1.45-1.50	≥11.0	≥876	≥12	≥960	53-55	422-438
M	35M	11.7-12.2	1.17-1.22	≥10.9	≥868	≥14	≥1114	33-36	263-287	≤100
	38M	12.2-12.5	1.22-1.25	≥11.3	≥899	≥14	≥1114	36-39	287-310
	40M	12.5-12.8	1.25-1.28	≥11.6	≥923	≥14	≥1114	38-41	302-326
	42M	12.8-13.2	1.28-1.32	≥12.0	≥955	≥14	≥1114	40-43	318-342
	45M	13.2-13.8	1.32-1.38	≥12.5	≥995	≥14	≥1114	43-46	342-366
	48M	13.8-14.2	1.38-1.42	≥12.9	≥1027	≥14	≥1114	46-49	366-390
	50M	14.0-14.5	1.40-1.45	≥13.0	≥1033	≥14	≥1114	48-51	382-406
	52M	14.3-14.6	1.43-1.46	≥13.1	≥1043	≥14	≥1114	50-53	398-422
	54M	14.5-15.0	1.45-1.50	≥13.2	≥1051	≥14	≥1114	52-55	414-438
H	35H	11.7-12.2	1.17-1.22	≥10.9	≥868	≥17	≥1353	33-36	263-287	≤120
	38H	12.2-12.5	1.22-1.25	≥11.3	≥899	≥17	≥1353	36-39	287-310
	40H	12.5-12.8	1.25-1.28	≥11.6	≥923	≥17	≥1353	38-41	302-326
	42H	12.8-13.2	1.28-1.32	≥12.0	≥955	≥17	≥1353	40-43	318-342
	45H	13.2-13.8	1.32-1.38	≥12.3	≥973	≥17	≥1353	43-46	342-366
	48H	13.7-14.2	1.37-1.42	≥12.5	≥995	≥17	≥1353	46-49	366-390
	50H	14.0-14.5	1.40-1.45	≥12.6	≥1003	≥17	≥1353	48-51	382-406
	52H	14.3-14.8	1.43-1.48	≥13.1	≥1043	≥17	≥1353	50-53	398-422
SH	35SH	11.7-12.2	1.17-1.22	≥11.0	≥876	≥20	≥1592	33-36	263-287	≤150
	38SH	12.2-12.5	1.22-1.25	≥11.4	≥907	≥20	≥1592	36-39	287-310
	40SH	12.5-12.8	1.25-1.28	≥11.8	≥939	≥20	≥1592	38-41	302-326
	42SH	12.8-13.2	1.28-1.32	≥12.1	≥963	≥20	≥1592	40-43	318-342
	45SH	13.2-13.8	1.32-1.38	≥12.3	≥979	≥20	≥1592	43-46	342-366
	48SH	13.7-14.3	1.37-1.43	≥12.7	≥1011	≥20	≥1592	46-49	366-390
	50SH	14.0-14.5	1.40-1.45	≥12.6	≥1003	≥20	≥1592	48-51	382-406
UH	28UH	10.4-10.8	1.04-1.08	≥9.6	≥764	≥25	≥1990	26-29	207-231	≤180
	30UH	10.8-11.3	10.8-1.13	≥10.2	≥812	≥25	≥1990	28-31	223-247
	33UH	11.3-11.7	1.13-1.17	≥10.7	≥852	≥25	≥1990	31-34	247-271
	35UH	11.7-12.2	1.17-1.22	≥10.8	≥860	≥25	≥1990	33-36	263-287
	38UH	12.2-12.5	1.22-1.25	≥11.3	≥899	≥25	≥1990	36-39	287-310
	40UH	12.5-12.8	1.25-1.28	≥11.8	≥939	≥25	≥1990	38-41	302-326
	42UH	12.8-13.2	1.28-1.32	≥12.1	≥963	≥25	≥1990	40-43	318-342
	45UH	13.2-13.8	1.32-1.38	≥12.3	≥979	≥25	≥1990	43-46	342-366
	48UH	13.7-14.3	1.37-1.43	≥12.7	≥1011	≥25	≥1990	46-49	366-390
EH	28EH	10.4-10.8	1.04-1.08	≥9.8	≥780	≥30	≥2388	26-29	207-231	≤200
	30EH	10.8-11.3	1.08-1.13	≥10.2	≥812	≥30	≥2388	28-31	223-247
	33EH	11.3-11.7	1.13-1.17	≥10.5	≥836	≥30	≥2388	31-34	247-271

Application

Neodymium rod magnets are typically used in medical, sensor, read switches, meters, and holding applications. Neodymium rod magnets can be magnetized through the length or across the diameter. The shape of a neodymium rod magnet produces a magnetic field with a longer reach.

006-Application

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