A neodymium magnet (also known as Neodymium Iron Boron magnet,or Neo magnet and NdFeB Magnet), is a type of so called ‘rare-earth’ permanent magnet. It is made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. This material is currently the strongest type of permanent magnet.

Today, NdFeB magnets are used in large quantities all over the world. The development of this material is not yet complete; the remanence and coercive field strength are being continually increased. The high energy of NdFeB magnets means that motors and sensors can be built ever smaller – and this signifies an increase in performance efficiency. The ongoing improvements enable this interesting material to be continually introduced into new areas.

Ningbo Ankey magnet Co Ltd has manufactured ordinarly NdFeB for twenty years and annual production is 1000 tons.

Customization and Creating magnetic solutions are In Our DNA. We have fully understand that only stable quality and competitive price ‘s product could been favorable in the MRi , sensor , lifting , chuck , separator , speaker , servomotor , gearless machines , wind power generator , HEV/EV traction motor , EPS motor , ABS motor, compressor , linear motor etc

NdFeB magnet is a strongest commercial permanent magnet which made from an alloy of neodymium ,iron, boron ,copper, aluminum etc . In virtue of their light weight , high magnetic strength ,the consistency of their magnetization and workability shape , NdFeB magnet have become a popular choice for a wide variety of applications, such as servo motor , gearless traction machines, permanent magnet synchronous motor , loudspeakers, permanent magnet synchronous generator , wheel motor etc .
After twenty years strive and equipped with advanced production machines and testing machines, Our NdFeB magnet has bellows properties:

  1. Higher Magnetic performance
    Our company has continuous mass production Of N52, N50M, 48H, 45SH, 40UH,40EH etc , But our technical engineer has not stop to develop new method for improved magnetic properties

2. Higher Uniformity

Through scientific technological regulations, we strictly manage the Br, Hcj, (BH)max and other magnetic property parameters of the magnets that are produced continuously, which ultimately ensure the high uniformity of our products’ performance.

3. Higher anti-corrosion

We use PCT to do the 480 hours (20 days) under the conditions of coating, 120centigrade’s high temperature, 2.2bar’s high pressure and 100%’s high humidity, the result is the surface of magnet without any yellow macula

4. Higher adhesive force

Glue magnet’s adhesive force are one of the key indexes to when choose the NdFeB magnet for motor and generator and electron market . We have introduce free surface energy > 60mN/M

5. Higher dimensional accuracy

Has established sophisticated production lines to meet the clients need for customization and capable of producing Higher dimensional accuracy. Best tolerance is +-/0.02MM and flatness is lower than 0.02MM .

6. Lower weight lost

We use HAST to do the 480 hours aging experiment under the conditions of non-coating, high temperature, high pressure and high humidity, the level of the loss weight can reach below 0.8 mg/cm2.

7. Lower magnetic attenuation

The magnet’s irreversible loss of flux is also very important thing need to consideration when your choose the magnet. we test the magnet At 120 X 5 hours situation of different batch magnet to repeat do on condition that high temperature to do demagnetize test .

8. Lower rare dysprosium used

In response to high prices and supply risks for dysprosium , our technical engineer has developed new magnet which used without any dysprosium for below N35-N52, N35M-N48M,N35H-N48H N33SH-N40SH magnet and used less dysprosium for 35EH .

Grade Residual Indusction Coercive Force Intrinsic Coercive Force Max Energy product temp coefficient work temp
(Br) ( HCb) ( HCj) (BH)Max 20℃-60℃ 20℃ – work temp℃
KGs T KOe KA/m KOe KA/m MGOe KJ/m³ %/℃(Br) %/℃(HCj) %/℃(Br) %/℃(HCj)
N35 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥12 ≥955 33-36 263-287 -0.12 -0.80 80
N38 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥12 ≥955 36-39 287-310 -0.12 -0.80 80
N40 12.5-12.8 1.25-1.28 ≥11.4 ≥907 ≥12 ≥955 38-41 302-326 -0.12 -0.80 80
N42 12.8-13.2 1.28-1.32 ≥11.5 ≥915 ≥12 ≥955 40-43 318-342 -0.12 -0.80 80
N45 13.2-13.8 1.32-1.38 ≥11.6 ≥923 ≥12 ≥955 43-46 342-366 -0.12 -0.80 80
N48 13.8-14.2 1.38-1.42 ≥11.7 ≥929 ≥12 ≥955 46-49 366-390 -0.12 -0.80 80
N50 14.0-14.5 1.40-1.45 ≥10.9 ≥868 ≥12 ≥955 48-51 382-406 -0.12 -0.80 80
N52 14.3-14.8 1.43-1.48 ≥10.9 ≥868 ≥12 ≥955 50-53 398-422 -0.12 -0.80 80
N35M 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥14 ≥1114 33-36 263-287 -0.115 -0.75 100
N38M 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥14 ≥1114 36-39 287-310 -0.115 -0.75 100
N40M 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥14 ≥1114 38-41 302-326 -0.115 -0.75 100
N42M 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥14 ≥1114 40-43 318-342 -0.115 -0.75 100
N45M 13.2-13.8 1.32-1.38 ≥12.5 ≥995 ≥14 ≥1114 43-46 342-366 -0.115 -0.75 100
N48M 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥14 ≥1114 46-49 366-390 -0.115 -0.75 100
N50M 14.0-14.5 1.40-1.45 ≥13 ≥1033 ≥14 ≥1114 48-51 382-406 -0.115 -0.75 100
N35H 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥17 ≥1353 33-36 263-287 -0.113 -0.72 -0.125 -0.605 120
N38H 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥17 ≥1353 36-39 287-310 -0.113 -0.72 -0.125 -0.605 120
N40H 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥17 ≥1353 38-41 302-326 -0.113 -0.72 -0.125 -0.605 120
N42H 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥17 ≥1353 40-43 318-342 -0.113 -0.72 -0.125 -0.605 120
N45H 13.2-13.8 1.32-1.38 ≥12.1 ≥963 ≥17 ≥1353 43-46 342-366 -0.113 -0.72 -0.125 -0.605 120
N48H 13.8-14.2 1.38-1.42 ≥12.5 ≥995 ≥17 ≥1353 46-49 366-390 -0.113 -0.72 -0.125 -0.605 120
N35SH 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥21 ≥1592 33-36 263-287 -0.110 -0.600 -0.115 -0.530 150
N38SH 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥21 ≥1592 36-39 287-310 -0.110 -0.600 -0.115 -0.530 150
N40SH 12.5-12.8 1.25-1.28 ≥11.8 ≥939 ≥21 ≥1592 38-41 302-326 -0.110 -0.600 -0.115 -0.530 150
N42SH 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥21 ≥1592 40-43 318-342 -0.110 -0.600 -0.115 -0.530 150
N45SH 13.2-13.8 1.32-1.38 ≥12.6 ≥1003 ≥21 ≥1592 43-46 342-366 -0.110 -0.600 -0.115 -0.530 150
N30UH 10.8-11.3 1.08-1.13 ≥10.2 ≥812 ≥25 ≥1990 28-31 223-247 -0.100 -0.560 -0.110 -0.510 180
N33UH 11.3-11.7 1.13-1.17 ≥10.7 ≥852 ≥25 ≥1990 31-34 247-271 -0.100 -0.560 -0.110 -0.510 180
N35UH 11.7-12.2 1.17-1.22 ≥10.8 ≥860 ≥25 ≥1990 33-36 263-287 -0.100 -0.560 -0.110 -0.510 180
N38UH 12.2-12.5 1.22-1.25 ≥11.0 ≥876 ≥25 ≥1990 36-39 287-310 -0.100 -0.560 -0.110 -0.510 180
N40UH 12.5-12.8 1.25-1.28 ≥11.3 ≥899 ≥25 ≥1990 38-41 302-326 -0.100 -0.560 -0.110 -0.510 180
N42UH 12.8-13.2 1.28-1.32 ≥11.4 ≥910 ≥25 ≥1990 40-43 318-342 -0.100 -0.560 -0.110 -0.510 180
N30EH 10.8-11.3 1.08-1.13 ≥10.2 ≥812 ≥30 ≥2388 28-31 223-247 -0.093 -0.51 -0.103 -0.470 180
N33EH 11.3-11.7 1.13-1.17 ≥10.5 ≥836 ≥30 ≥2388 31-34 247-271 -0.093 -0.51 -0.103 -0.470 180
N35EH 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥30 ≥2388 33-36 263-287 -0.093 -0.51 -0.103 -0.470 180
N38EH 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥30 ≥2388 36-39 287-310 -0.093 -0.51 -0.103 -0.470 180
N40EH 12.5-12.8 1.25-1.28 ≥11.3 ≥899 ≥30 ≥2388 38-41 302-326 -0.093 -0.51 -0.103 -0.470 180

manufacturable size

Shape Schematic Diagram Range Economic Dimensions
Block L ≤ 200 MM

W≤ 200 MM

H≤ 60 MM

L/W ≤ 20

L/H ≤ 20

L ≤ 100 MM

W≤ 50 MM

H≤ 50 MM

L/W ≤ 5

L/H ≤ 5

Disc D ≤ 200 MM

H≤ 50 MM

D/H ≤ 20

D ≤ 150 MM

H≤ 40 MM

D/H ≤ 15

Ring OD ≤ 200 MM

ID ≥ 0.8 MM

(OD-ID) / 2 ≥ 1.0MM

ID/OD ≤ 0.8

H≤ 50 MM

OD ≤ 150 MM

ID ≥ 2 MM

(OD-ID) / 2 ≥ 2.0MM

ID/OD ≤ 0.6

H≤ 40 MM

Bread L ≤ 200 MM

W≤ 100 MM

H≤ 60 MM

L/H ≤ 20

L ≤ 100 MM

W≤ 50 MM

H≤ 40 MM

L/H ≤ 10

Arc L ≤ 200 MM

W≤ 200 MM

1.5 MM ≥ H ≤ 60 MM

T≤ 50 MM

L/H ≤ 10

A ≤ 180

L ≤ 200 MM

W≤ 200 MM

1.5 MM ≥ H ≤ 60 MM

T≤ 40 MM

L/H ≤ 5

A ≤ 90

sector   W ≤ 150 MM

H≤ 80 MM

T≤ 50 MM

W/H ≤ 5

W/T ≤ 30

W ≤ 100 MM

H≤ 80 MM

T≤ 50 MM

W/H ≤ 3

W/T ≤ 30

trapezium  W1 ≤ 180 MM

W2 ≤ 150 MM

H≤ 100 MM

T≤ 50 MM

W1/T ≤ 30

W2/T ≤ 20

 W1 ≤ 100 MM

W2 ≤ 80 MM

H≤ 60 MM

T≤ 40 MM

W1/T ≤ 20

W2/T ≤ 10

manufacturable precision

manufacturable-precision

Magnetized Direction

thickness magnetized

block-thickness-magnetized

thickness magnetized

thickness magnetized

axial magnetized

diemetral magnetized

diemetral magnetized

radially magnetized

multi poles through thickness

multi poles through thickness

multi poles through thickness

multi poles through thickness

manufacturable Coating

Coating materials Thickness of Coating layer Physical properties Max work Temperature PCT SST
Passvation 0-02μm  Colorless or light gray layer
Zn 8-15μm Layer color: blue and white,.
Coating layer is compact, stable and homogeneous.
≤160℃ >24hr
Colur ZN 10-15μm ≤160℃ >24hr
NiSn 10-30μm ≤160℃ >48hr >96hr
Ni 15-30μm Homogeneous and Light yellow layer. ≤200℃ >24hr >48hr
Double Ni( Ni+Cu+Ni) 20-30μm ≤200℃ >48hr >96hr
Electroless NI 20-30μm ≤200℃ >48hr >96hr
Al Spraying 6-20μm dark silver, silver white layer with certain luster. ≤200℃ >48hr >288hr
IVD Al 10-30μm ≤400℃ >48hr >288hr
Epoxy 10-20μm black, gray layer with certain luster. ≤200℃ >48hr  >96hr
Ni+Cu+epoxy 15-30μm ≤200℃ >72hr >96hr
Zn+expory 15-25μm ≤200℃ >72Hr  >96hr
Zintek 10-30μm black, gray layer with certain luster. ≤200℃ >200Hr  >800hr
Zintek+epoxy 20-30μm ≤200℃ >200Hr   >1500hr

NdFeB Magnet Common Packing

Packing for big size NdFeB Magnet

special packing for NdFeB magnet

packed in plastic tube

Arc magnet Packing

line packing

skin packing

Line packing

skin packing

wooden box packing