Overview

Layered Permanent magnet is a new construction of permanent magnet, which has been designed by motor engineer.

Ningbo Ankey magnet Co Ltd has manufactured ordinarly NdFeB Layered permanent magnets for 8 years, annual production capacity  is 100000PCS .

Layered Permanent magnets are widely used in axial flux motor, EV/HEV traction motor, transverse flux motor, wind turbine generator, servo motor, torque motor, high speed motor etc.

Highlights

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 .

magnetic Properties and demagnetized curve

Grade Residual Indusction Coercive Force Intrinsic Coercive Force Max Energy product temp coefficient Max working temperature
（Br） ( HCb) ( HCj) (BH)Max 20 – max WT PC=2.17
KGs T KOe KA/m KOe KA/m MGOe KJ/m³ %/℃(Br) %/℃(HCj) ℃
N35 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥12 ≥955 33-36 263-287  0.12 0.76 80
N38 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥12 ≥955 36-39 287-310 0.12 0.76 80
N40 12.5-12.8 1.25-1.28 ≥11.4 ≥907 ≥12 ≥955 38-41 302-326 0.12  0.76 80
N42 12.8-13.2 1.28-1.32 ≥11.5 ≥915 ≥12 ≥955 40-43 318-342  0.12 0.76 80
N45 13.2-13.8 1.32-1.38 ≥11.6 ≥923 ≥12 ≥955 43-46 342-366  0.12 0.76 80
N45-F 13.2-13.8 1.32-1.38 ≥11.6 ≥923 ≥12 ≥955 43-46 342-366  0.12  0.76 80
N48 13.8-14.2 1.38-1.42 ≥11.6 ≥923 ≥12 ≥955 46-49 366-390 0.12 0.76 80
N48-F 13.8-14.2 1.38-1.42 ≥11.6 ≥923 ≥12 ≥955 46-49 366-390 0.12 0.76 80
N50 14.0-14.5 1.40-1.45 ≥11.4 ≥907 ≥12 ≥955 48-51 382-406  0.12  0.80 80
N50-F 14.0-14.5 1.40-1.45 ≥11.4 ≥907 ≥12 ≥955 48-51 382-406  0.12 0.80 80
N52 14.3-14.8 1.43-1.48 ≥11.4 ≥907 ≥12 ≥955 50-53 398-422  0.12 0.80 80
N52-F 14.3-14.8 1.43-1.48 ≥11.4 ≥907 ≥12 ≥955 50-53 398-422 0.12  0.80 80
N54 14.5-15.1 1.45-1.51 ≥11.4 ≥868 ≥12 ≥955 52-55 414-438 0.12 0.80 80
N54-F 14.5-15.1 1.45-1.51 ≥11.4 ≥868 ≥12 ≥955 52-55 414-438 0.12 0.80 80
N33M 11.2-11.7 1.12-1.17 ≥10.7 ≥852 ≥14 ≥1114 31-34 247-271 0.115  0.70 100
N35M 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥14 ≥1114 33-36 263-287  0.115 0.70 100
N38M 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥14 ≥1114 36-39 287-310 0.115 0.70 100
N40M 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥14 ≥1114 38-41 302-326  0.115 0.70 100
N42M 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥14 ≥1114 40-43 318-342 0.115 0.70 100
N42M-F 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥14 ≥1114 40-43 318-342  0.115  0.70 100
N45M 13.2-13.8 1.32-1.38 ≥12.5 ≥995 ≥14 ≥1114 43-46 342-366  0.115 0.70 100
N45M-F 13.2-13.8 1.32-1.38 ≥12.5 ≥995 ≥14 ≥1114 43-46 342-366  0.115 0.70 100
N48M 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥14 ≥1114 46-49 366-390 0.115 0.70 100
N48M-F 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥14 ≥1114 46-49 366-390  0.115 0.70 100
N50M 14.0-14.5 1.40-1.45 ≥13.0 ≥1033 ≥14 ≥1114 48-51 382-406 0.115  0.70 100
N50M-F 14.0-14.4 1.40-1.44 ≥13.0 ≥1033 ≥14 ≥1114 48-51 382-406  0.115 0.70 100
N52M 14.3-14.8 1.43-1.48 ≥13.2 ≥1050 ≥14 ≥1114 50-53 398-422 0.115 0.70 100
N52M-F 14.3-14.8 1.43-1.48 ≥13.2 ≥1050 ≥14 ≥1114 50-53 398-422 0.115 0.70 100
N30H 10.8-11.2 1.08-1.12 ≥10.3 ≥820 ≥17 ≥1353 28-31 223-247 -0.115 -0.620 120
N33H 11.2-11.7 1.12-1.17 ≥10.7 ≥852 ≥17 ≥1353 31-34 247-271 -0.115 -0.620 120
N35H 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥17 ≥1353 33-36 263-287 -0.115 -0.620 120
N35H-F 11.7-12.2 1.17-1.22 ≥10.9 ≥868 ≥17 ≥1353 33-36 263-287 -0.115 -0.620 120
N38H 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥17 ≥1353 36-39 287-310 -0.115 -0.620 120
N38H-F 12.2-12.5 1.22-1.25 ≥11.3 ≥899 ≥17 ≥1353 36-39 287-310 -0.115 -0.620 120
N40H 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥17 ≥1353 38-41 302-326 -0.115 -0.620 120
N40H-F 12.5-12.8 1.25-1.28 ≥11.6 ≥923 ≥17 ≥1353 38-41 302-326 -0.115 -0.620 120
N42H 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥17 ≥1353 40-43 318-342 -0.115 -0.620 120
N42H-F 12.8-13.2 1.28-1.32 ≥12.0 ≥955 ≥17 ≥1353 40-43 318-342 -0.115 -0.620 120
N45H 13.2-13.8 1.32-1.38 ≥12.5 ≥995 ≥17 ≥1353 43-46 342-366 -0.115 -0.620 120
N45H-F 13.2-13.8 1.32-1.38 ≥12.5 ≥995 ≥17 ≥1353 43-46 342-366 -0.115 -0.620 120
N48H 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥17 ≥1353 46-49 366-390 -0.115 -0.620 120
N48H-F 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥17 ≥1353 46-49 366-390 -0.115 -0.620 120
N50H 14.0-14.5 1.40-1.45 ≥13.0 ≥1033 ≥16.5 ≥1314 48-51 382-406 -0.115 -0.660 120
N50H-G 14.0-14.4 1.40-1.44 ≥13.0 ≥1033 ≥16.5 ≥1314 48-51 382-406 -0.115 -0.660 120
N52H-G 14.3-14.8 1.43-1.48 ≥13.2 ≥1050 ≥16.5 ≥1314 50-53 398-422 -0.115 -0.660 120
N30SH 10.8-11.2 1.08-1.12 ≥10.3 ≥820 ≥20 ≥1592 28-31 223-247 -0.115 -0.550 150
N33SH 11.2-11.7 1.12-1.17 ≥10.7 ≥852 ≥20 ≥1592 31-34 247-271 -0.115 -0.550 150
N35SH 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥20 ≥1592 33-36 263-287 -0.115 -0.550 150
N35SH-F 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥20 ≥1592 33-36 263-287 -0.115 -0.550 150
N38SH 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥20 ≥1592 36-39 287-310 -0.115 -0.550 150
N38SH-F 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥20 ≥1592 36-39 287-310 -0.115 -0.550 150
N40SH 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥20 ≥1592 38-41 302-326 -0.115 -0.550 150
N40SH-F 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥20 ≥1592 38-41 302-326 -0.115 -0.550 150
N42SH 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥20 ≥1592 40-43 318-342 -0.115 -0.550 150
N42SH-F 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥20 ≥1592 40-43 318-342 -0.115 -0.550 150
N45SH 13.2-13.8 1.32-1.38 ≥12.6 ≥1003 ≥20 ≥1592 43-46 342-366 -0.115 -0.550 150
N45SH-G 13.2-13.8 1.32-1.38 ≥12.6 ≥1003 ≥20 ≥1592 43-46 342-366 -0.115 -0.550 150
N48SH 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥20 ≥1592 46-49 366-390 -0.115 -0.550 150
N48SH-G 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥20 ≥1592 46-49 366-390 -0.115 -0.550 150
N50SH-G 14.0-14.5 1.40-1.45 ≥13.0 ≥1033 ≥20 ≥1592 48-51 382-406 -0.115 -0.550 150
N30UH 10.8-11.2 1.08-1.12 ≥10.3 ≥820 ≥25 ≥1990 28-31 223-247 -0.110 -0.465 180
N30UH-G 10.8-11.2 1.08-1.12 ≥10.3 ≥820 ≥25 ≥1990 28-31 223-247 -0.110 -0.465 180
N33UH 11.2-11.7 1.12-1.17 ≥10.7 ≥852 ≥25 ≥1990 31-34 247-271 -0.110 -0.465 180
N33UH-G 11.2-11.7 1.12-1.17 ≥10.7 ≥852 ≥25 ≥1990 31-34 247-271 -0.110 -0.465 180
N35UH 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥25 ≥1990 33-36 263-287 -0.110 -0.465 180
N35UH-G 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥25 ≥1990 33-36 263-287 -0.110 -0.465 180
N38UH 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥25 ≥1990 36-39 287-310 -0.110 -0.465 180
N38UH-G 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥25 ≥1990 36-39 287-310 -0.110 -0.465 180
N40UH 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥25 ≥1990 38-41 302-326 -0.110 -0.465 180
N40UH-G 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥25 ≥1990 38-41 302-326 -0.110 -0.465 180
N42UH 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥25 ≥1990 40-43 318-342 -0.110 -0.465 180
N42UH-G 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥25 ≥1990 40-43 318-342 -0.110 -0.465 180
N45UH 13.2-13.8 1.32-1.38 ≥12.6 ≥1003 ≥25 ≥1990 43-46 342-366 -0.110 -0.465 180
N45UH-G 13.2-13.8 1.32-1.38 ≥12.6 ≥1003 ≥25 ≥1990 43-46 342-366 -0.110 -0.465 180
N48UH-G 13.8-14.2 1.38-1.42 ≥12.9 ≥1027 ≥25 ≥1990 46-49 366-390 -0.110 -0.465 180
N30EH 10.8-11.3 1.08-1.13 ≥10.2 ≥812 ≥30 ≥2388 28-31 223-247 -0.105 -0.420 200
N30EH-G 10.8-11.3 1.08-1.13 ≥10.2 ≥812 ≥30 ≥2388 28-31 223-247 -0.105 -0.420 200
N33EH 11.3-11.7 1.13-1.17 ≥10.5 ≥836 ≥30 ≥2388 31-34 247-271 -0.105 -0.420 200
N33EH-G 11.3-11.7 1.13-1.17 ≥10.5 ≥836 ≥30 ≥2388 31-34 247-271 -0.105 -0.420 200
N35EH 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥30 ≥2388 33-36 263-287 -0.105 -0.420 200
N35EH-G 11.7-12.2 1.17-1.22 ≥11.0 ≥876 ≥30 ≥2388 33-36 263-287 -0.105 -0.420 200
N38EH 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥30 ≥2388 36-39 287-310 -0.105 -0.420 200
N38EH-G 12.2-12.5 1.22-1.25 ≥11.4 ≥907 ≥30 ≥2388 36-39 287-310 -0.105 -0.420 200
N40EH 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥30 ≥2388 38-41 302-326 -0.105 -0.420 200
N40EH-G 12.5-12.8 1.25-1.28 ≥11.9 ≥947 ≥30 ≥2388 38-41 302-326 -0.105 -0.420 200
N42EH-G 12.8-13.2 1.28-1.32 ≥12.4 ≥987 ≥30 ≥2388 40-43 318-342 -0.105 -0.420 200
Note: The above –mentioned data of magnetic properties and physical properties are given at 20°C±2°C. Test sample is polished dia 10 X 7 without chamfering and plating.         max WT = Max work Temperature
Note: The max working temperature of magnet is changeable due to length-diameter ration, coating thickness and working environment factors, Normal It is tested the inevitable loss of magnetic force is less than 5% .
Note: G Seriers (N54H-G / N52SH-G) is produced by Grain boundary diffusion process technology, It only suits for finished magnet＇s magnetization direction is less than 6MM.
Note: F Seriers (N54H-F / N52SH-F) is produced by without heavy rare earth process technology .

manufacturing capability

manufacturable size

Shape Schematic Diagram Range Economic Dimensions
Block L ≤ 250 MM

W≤ 250 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 ≤ 250 MM

H≤ 50 MM

D/H ≤ 20

 D ≤ 150 MM

H≤ 40 MM

D/H ≤ 15
Ring OD ≤ 250 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 ≤ 250 MM

W≤ 150 MM

H≤ 60 MM

L/H ≤ 20

 L ≤ 100 MM

W≤ 50 MM

H≤ 40 MM

L/H ≤ 10
Arc L ≤ 250 MM

W≤ 250 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 ≤ 200 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≤ 150 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

Sharp Disk, Ring, Block, Arc, ball, sphere,  Heteromorphism      Unit: mm
Dimension range OD ID L W T Planar Parallel Perpendicular Columnar Concentricity
≤5 ±0.03 ±0.05 ±0.04 ±0.04 ±0.04 0.02 0.03 0.03 0.02 0.04
5＜and≤10 ±0.04 ±0.04 ±0.04 ±0.04 ±0.03 0.02 0.04 0.05 0.02 0.05
10＜and≤20 ±0.05 ±0.05 ±0.05 ±0.05 ±0.04 0.03 0.05 0.08 0.03 0.10
20＜and≤30 ±0.05 ±0.06 ±0.06 ±0.06 ±0.05 0.04 0.05 0.10 0.03 0.15
30＜and≤40 ±0.06 ±0.07 ±0.06 ±0.06 ±0.05 0.05 0.08 0.20 0.04 0.20
40＜and≤50 ±0.06 ±0.07 ±0.06 ±0.06 ±0.05 0.05 0.08 0.20 0.04 0.20
50＜and≤60 ±0.08 ±0.08 ±0.10 ±0.10 ±0.08 0.05 0.10 0.25 0.05 0.20
60＜and≤100 ±0.10 ±0.10 ±0.10 ±0.10 ±0.10 0.06 0.10 0.30 0.06 0.20
100＜and≤250 ±0.20 ±0.10 ±0.10 ±0.10 ±0.10 0.09 0.10 0.30 0.06 0.20

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
Ni＋Sn 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

Magnetized Direction

thickness magnetized

block-thickness-magnetized

thickness magnetized

thickness magnetized

axial magnetized

diametral magnetized

diametral magnetized

radially magnetized

multi poles through thickness

multi poles through thickness

multi poles through thickness

multi poles through thickness

Packing

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

wrap packing

wooden box packing