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Magnet system and assembly

Magnet assemblies are permanent magnets bonded to other permanent magnets or to different carrier materials. Our team is mainly engaged in various permanent magnet couplings, magneto rotors, linear motor stators and halbach array magnetic assemblies.
The extremely precise positioning of the magnets and the very high forces associated with the bulky magnetized parts make the assembly of magnet assemblies a challenging task. For this process, we use our extensive experience in the design and manufacture of assembly tools as well as our expertise in selecting the appropriate bonding process.
Our manufacturing ranges from high-volume production of systems for the automotive industry to individual large components of small series of high-tech products and electric motors for medical use.
Our capabilities are in mold design, EDM, ID slicing and grinding, metal part machining, injection molding, aluminum die casting, bonding, magnetic characterization, system integration. We will analyze the possibility of quality issues including pole angle deviation, tilt angle deviation, cogging torque, pole peak non-uniformity, noise issues (harmonics), microcracks.

Grade & types of neodymium magnets

Grade Remanence,Br
 Coercivity,Hcb Intrinsic Coercivity, Hcj Maximum Energy Product, (BH)max Working Temp.,
mT kGs kA/m kOe kA/m kOe kJ/m3 MGOe Celsius ℃
N55 1470-1520 14.7-15.3 ≥860 ≥10.8 ≥876 ≥11 414-438 52-56 70
N52 1430-1480 14.3-14.8 ≥860 ≥10.8 ≥876 ≥11 398-422 50-53 70
N50 1400-1450 14.0-14.5 ≥860 ≥10.8 ≥960 ≥12 382-406 48-51 70
N48 1380-1420 13.8-14.2 ≥836 ≥10.5 ≥900 ≥11 366-390 46-49 80
N45 1380-1420 13.2-13.8 ≥876 ≥11.0 ≥960 ≥12 342-366 43-46 80
N42 1280-1320 12.8-13.2 ≥923 ≥11.6 ≥960 ≥12 318-342 40-43 80
N40 1250-1280 12.5-12.8 ≥923 ≥11.6 ≥960 ≥12 302-326 38-41 80
N38 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥960 ≥12 287-310 36-39 80
N35 1170-1210 11.7-12.2 ≥868 ≥10.9 ≥960 ≥12 263-287 33-36 80
N33 1130-1180 11.3-11.8 ≥836 ≥10.5 ≥960 ≥12 247-270 31-34 80
N30 1080-1130 10.8-11.3 ≥796 ≥10 ≥960 ≥12 223-247 28-31 80
N52M 1430-1480 14.3-14.8 ≥1035 ≥13.0 ≥1114 ≥14 398-414 50-52 100
N50M 1400-1450 14.0-14.5 ≥1035 ≥13.0 ≥1114 ≥14 382-406 48-51 100
N48M 1360-1430 13.7-14.3 ≥1027 ≥12.9 ≥1114 ≥14 366-390 46-49 100
N45M 1320-0380 13.2-13.8 ≥995 ≥12.5 ≥1114 ≥14 342-366 43-46 100
N42M 1280-1320 12.8-13.2 ≥955 ≥12.0 ≥1114 ≥14 318-342 40-43 100
N40M 1250-1280 12.5-12.8 ≥923 ≥11.6 ≥1114 ≥14 302-326 38-41 100
N38M 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1114 ≥14 287-310 36-39 100
N35M 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥1114 ≥14 263-287 33-36 100
N33M 1130-1180 11.3-11.8 ≥836 ≥10.5 ≥1114 ≥14 247-270 31-34 100
N30M 1080-1130 10.8-11.3 ≥796 ≥10 ≥1114 ≥14 223-247 28-31 100
N50H 1400-1450 14.0-14.5 ≥1035 ≥13.0 ≥1274 ≥16 382-406 48-51 120
N48H 1370-1430 13.7-14.3 ≥1035 ≥13.0 ≥1274 ≥16 366-390 46-49 120
N46H 1330-1380 13.3-13.8 ≥1018 ≥12.8 ≥1274 ≥16 350-374 44-47 120
N45H 1330-1380 13.3-13.8 ≥1010 ≥12.7 ≥1353 ≥17 342-366 43-46 120
N44H 1310-1360 13.1-13.8 ≥1003 ≥12.6 ≥1353 ≥17 326-358 42-45 120
N42H 1280-1320 12.8-13.2 ≥995 ≥12.5 ≥1353 ≥17 318-342 40-43 120
N40H 1250-1280 12.5-12.8 ≥940 ≥11.8 ≥1353 ≥17 302-326 38-41 120
N38H 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1353 ≥17 287-310 36-39 120
N35H 1170-1220 11.7-12.2 ≥876 ≥11.0 ≥1353 ≥17 263-287 33-36 120
N33H 1130-1180 11.3-11.8 ≥844 ≥10.6 ≥1353 ≥17 247-271 31-34 120
N30H 1080-1130 10.8-11.3 ≥812 ≥10.2 ≥1353 ≥17 223-247 28-31 120
Grade Remanence,Br Coercivity,Hcb Intrinsic Coercivity, Hcj Maximum Energy Product, (BH)max Working Temp.,
mT kGs kA/m kOe kA/m kOe kJ/m3 MGOe Celsius ℃
N48SH 1370-1430 13.7-14.3 ≥1003 ≥12.6 ≥1600 ≥20 366-390 46-49 150
N45SH 1320-1380 13.2-13.8 ≥1003 ≥12.6 ≥1600 ≥20 342-366 43-46 150
N44SH 1310-1350 13.1-13.5 ≥1003 ≥12.6 ≥1600 ≥20 334-358 42-45 150
N42SH 1280-1320 12.8-13.2 ≥995 ≥12.5 ≥1600 ≥20 318-342 40-43 150
N40SH 1250-1280 12.5-12.8 ≥947 ≥11.9 ≥1600 ≥20 302-326 38-41 150
N38SH 1220-1250 12.2-12.5 ≥931 ≥11.7 ≥1600 ≥20 287-310 36-39 150
N35SH 1170-1220 11.7-12.2 ≥907 ≥11.4 ≥1600 ≥20 263-287 33-36 150
N33SH 1130-1170 11.3-11.7 ≥844 ≥10.6 ≥1600 ≥20 247-271 31-34 150
N30SH 1080-1130 10.8-11.3 ≥804 ≥10.1 ≥1600 ≥20 223-247 28-31 150
N42UH 1280-1320 12.8-13.2 ≥907 ≥11.4 ≥2000 ≥25 318-342 40-43 180
N40UH 1240-1280 12.4-12.8 ≥907 ≥11.4 ≥2000 ≥25 302-326 38-41 180
N38UH 1220-1250 12.2-12.5 ≥907 ≥11.4 ≥2000 ≥25 287-310 36-39 180
N35UH 1180-1220 11.8-12.2 ≥875 ≥11.0 ≥2000 ≥25 263-287 33-36 180
N33UH 1130-1170 11.3-11.7 ≥844 ≥10.6 ≥2000 ≥25 247-271 31-34 180
N30UH 1020-1080 10.8-11.3 ≥835 ≥10.5 ≥2000 ≥25 223-247 28-31 180
N28UH 1050-1080 10.5-10.8 ≥764 ≥9.6 ≥2000 ≥25 207-239 26-30 180
N42EH 1280-1310 12.8-13.1 ≥907 ≥11.4 ≥2388 ≥30 320-340 38-41 200
N40EH 1240-1280 12.5-12.8 ≥907 ≥11.4 ≥2388 ≥30 302-326 38-41 200
N38EH 1220-1250 12.2-12.8 ≥907 ≥11.4 ≥2388 ≥30 287-310 36-39 200
N35EH 1170-1220 11.7-12.2 ≥876 ≥11.0 ≥2388 ≥30 263-287 33-36 200
N33EH 1130-1170 11.3-11.7 ≥812 ≥10.2 ≥2388 ≥30 247-271 31-34 200
N30EH 1080-1130 10.8-11.3 ≥812 ≥10.2 ≥2388 ≥30 223-247 28-31 200
N28EH 1040-1090 10.4-10.9 ≥780 ≥9.8 ≥2400 ≥30 207-231 26-29 200
N38AH 1220-1250 12.2-12.5 ≥907 ≥11.4 ≥2706 ≥34 287-310 36-39 240
N35AH 1170-1220 11.7-12.2 ≥812 ≥10.2 ≥2785 ≥35 263-287 33-36 240
N33AH 1130-1170 11.3-11.7 ≥812 ≥10.2 ≥2785 ≥35 247-271 31-34 240
N30AH 1080-1130 10.8-11.3 ≥812 ≥10.2 ≥2785 ≥35 223-247 28-31 240

* The temperature ratings are guideline values.
* The data of magnetic parameters and physical properties are given at room temperature (20℃).
* The actual maximum temperature and performance of magnets is also subject to magnet shape, the ratio of length and diameter, coating and applications.

Physical Characteristics (Typical)

Characteristic Symbol Unit Value
Density D g/cm 7.45-7.65
Vickers Hardness Hv D.P.N 620
Compression Strength C.S N/mm2 780
Coefcient of Thermal Expansion C// 10-6/°C 3.4
CŁ 10-6/°C -4.8
Electrical Resistivity ƿ µ Ω.cm 1.8x10 x^(-4)
Temperature coefcient of resistivity α 10x^(-4)/°C 2
Electrical Conductivity σ kCal/(m.h.°C) 0.667
Thermal Conductivity k kCal/(kg.°C) 8.9551
Specifc Heat Capacity c kg/mm2 0.12
Tensile Strength σUTS, or SU Mpa 80
Young's Modulus λ / E 10-12m2/N 0.16x1011
Flexural Strength β 10-12m2/N 9.8
Compressibility σ 10-12m2/N 9.8
Rigidity E.I N/m2 0.64
Poisson's Ratio ν 0.24
Curie Temperature Tc °C 310-380

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