Electric vehicle traction motors
Demagnetization margin, working temperature and coating durability.
NdFeB Permanent Magnets
High-performance permanent magnets engineered to your geometry, magnetic grade, temperature and coating requirements. Sintered NdFeB delivers the highest energy product of any commercial magnet material — grades N35 through N54, temperature classes M through EH.
For Procurement
MOQ, lead time, packaging and commercial terms — go straight to a quotation.
Request a Quote →For Engineering
Grades, drawings, process data and design support for your DFM review.
Grade Datasheets & Technical Data →For Quality / SQE
Certificates, inspection planning, traceability and PPAP / FAI support per project.
Certificates & Documentation →Magnetic Performance at a Glance
Product Range
NdFeB Magnets — Product Gallery
Representative product forms for reference. Motor arc and coating visuals are illustrations; final geometry and finish are agreed for each project.
Why NdFeB?
NdFeB offers 10× the energy product of ferrite and 3× that of AlNiCo. For any application where size, weight, or efficiency matters — EV motors, hard disk drives, magnetic separators, sensors — NdFeB is the material of choice.
- ✓Highest energy density — up to 54 MGOe enables dramatically smaller magnet volumes
- ✓Wide grade selection — over 40 standard grades covering every cost-performance point
- ✓Coercivity options — H, SH, UH, EH, and AH classes for high-temperature stability
- ✓Shape flexibility — blocks, discs, rings, arcs, segments, and custom geometries
Applications
| Application | Typical Grade | Why NdFeB |
|---|---|---|
| EV / BLDC Motors | N42SH–N48SH | High torque density in compact rotor |
| Sensors & Encoders | N35–N42 | Strong, stable field in small package |
| Magnetic Separators | N42–N52 | High field gradient for fine particle capture |
| Wind Turbine Generators | N42SH–N48SH | Direct-drive efficiency at elevated temp |
| Acoustic Devices | N35–N45 | Compact drivers with strong flux |
| Magnetic Couplings | N38SH–N42SH | Torque through sealed barriers |
Standard Grade Selection
Full datasheets available for download — 35 NdFeB grades in our library.
| Grade | Max Energy Product | Br (kGs) | bHc (kOe) | iHc (kOe) | Max Temp | Best For |
|---|---|---|---|---|---|---|
| N35 | 33–36 MGOe | 11.7–12.1 | ≥10.8 | ≥12 | 80°C | General purpose, cost-effective |
| N42 | 40–43 MGOe | 12.9–13.3 | ≥11.6 | ≥12 | 80°C | High performance standard |
| N45SH | 43–46 MGOe | 13.4–13.8 | ≥11.8 | ≥20 | 150°C | EV motors, high-temp |
| N48SH | 46–49 MGOe | 13.9–14.3 | ≥12.4 | ≥20 | 150°C | Premium motor grade |
| N38UH | 36–39 MGOe | 12.2–12.6 | ≥11.0 | ≥25 | 180°C | Aerospace, high-coercivity |
| N35EH | 33–36 MGOe | 11.7–12.1 | ≥10.8 | ≥30 | 200°C | Extreme temperature |
Complete Grade Chart — All 100 Standard Grades
Full magnetic properties for every sintered NdFeB grade we manufacture, from N28 to G-54UH. Click PDF in any row to download that grade's datasheet.
| Name | Download | Grade | Br mT (kGs) |
Hcb kA/m (kOe) |
Hcj kA/m (kOe) |
(BH)max kJ/m³ (MGOe) |
αBr %/°C |
βHcj %/°C |
|---|---|---|---|---|---|---|---|---|
| S-NdFeB 280/96 | N35 | 1180-1230 (11.8-12.3) | ≥876 (≥11) | ≥955 (≥12) | 263-287 (33-36) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 300/96 | N38 | 1230-1260 (12.3-12.6) | ≥899 (≥11.3) | ≥955 (≥12) | 287-310 (36-39) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 320/96 | N40 | 1260-1290 (12.6-12.9) | ≥912 (≥11.5) | ≥955 (≥12) | 302-326 (38-41) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 335/96 | N42 | 1290-1330 (12.9-13.3) | ≥923 (≥11.6) | ≥955 (≥12) | 318-342 (40-43) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 360/96 | N45 | 1330-1370 (13.3-13.7) | ≥931 (≥11.7) | ≥955 (≥12) | 342-366 (43-46) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 380/96 | N48 | 1370-1400 (13.7-14.0) | ≥939 (≥11.8) | ≥955 (≥12) | 366-390 (46-49) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 400/96 | N50 | 1390-1430 (13.9-14.3) | ≥947 (≥11.9) | ≥955 (≥12) | 374-406 (47-51) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 415/96 | N52 | 1420-1460 (14.2-14.6) | ≥947 (≥11.9) | ≥955 (≥12) | 390-414(49-52) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 430/96 | N54 | 1450-1490 (14.5-14.9) | ≥912 (≥11.5) | ≥955 (≥12) | 406-438 (51-55) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 445/96 | N56 | 1480-1520 (14.6-15.2) | ≥860 (≥10.8) | ≥876 (≥11) | 422-454 (52-57) | 0.10-0.124 | 0.65-0.80 | |
| S-NdFeB 280/111 | 35M | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1114 (≥14) | 263-287 (33-36) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 300/111 | 38M | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1114 (≥14) | 287-310 (36-39) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 320/111 | 40M | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1114 (≥14) | 302-326 (38-41) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 335/111 | 42M | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1114 (≥14) | 318-342 (40-43) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 360/111 | 45M | 1330-1370 (13.3-13.7) | ≥1002 (≥12.6) | ≥1114 (≥14) | 342-366 (43-46) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 380/111 | 48M | 1370-1400 (13.7-14.0) | ≥1027 (≥12.9) | ≥1114 (≥14) | 366-390 (46-49) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 400/111 | 50M | 1390-1430 (13.9-14.3) | ≥1035 (≥13.0) | ≥1114 (≥14) | 374-406 (47-51) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 415/111 | 52M | 1420-1460 (14.2-14.6) | ≥995 (≥12.5) | ≥1114 (≥14) | 390-414(49-52) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 430/111 | 54M | 1450-1490 (14.5-14.9) | ≥995 (≥12.5) | ≥1114 (≥14) | 406-438 (51-55) | 0.10-0.124 | 0.60-0.75 | |
| S-NdFeB 240/135 | 30H | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1353 (≥17) | 223-247 (28-31) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 260/135 | 33H | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1353 (≥17) | 247-271 (31-34) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 280/135 | 35H | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1353 (≥17) | 263-287 (33-36) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 300/135 | 38H | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1353 (≥17) | 287-310 (36-39) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 320/135 | 40H | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1353 (≥17) | 302-326 (38-41) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 335/135 | 42H | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1353 (≥17) | 318-342 (40-43) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 360/135 | 45H | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1353 (≥17) | 342-366 (43-46) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 380/135 | 48H | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1353 (≥17) | 366-390 (46-49) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 400/135 | 50H | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1353 (≥17) | 374-406 (47-51) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 415/127 | 52H | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1353 (≥17) | 390-414(49-52) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 430/127 | 54H | 1450-1490 (14.5-14.9) | ≥1074 (≥13.5) | ≥1274 (≥16) | 406-438 (51-55) | 0.09-0.120 | 0.55-0.70 | |
| S-NdFeB 240/159 | 30SH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1592 (≥20) | 223-247 (28-31) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 260/159 | 33SH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1592 (≥20) | 247-271 (31-34) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 280/159 | 35SH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1592 (≥20) | 263-287 (33-36) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 300/159 | 38SH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1592 (≥20) | 287-310 (36-39) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 320/159 | 40SH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1592 (≥20) | 302-326 (38-41) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 335/159 | 42SH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1592 (≥20) | 318-342 (40-43) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 335/167 | N42SH-HRE | 1310-1330 (13.1-13.3) | ≥1020 (≥12.8) | ≥1671 (≥21.0) | 333-341 (42.0-43.0) | -0.125 | -0.600 | |
| S-NdFeB 360/159 | 45SH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1592 (≥20) | 342-366 (43-46) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 380/159 | 48SH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1592 (≥20) | 366-390 (46-49) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 400/159 | 50SH | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1592 (≥20) | 374-406 (47-51) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 430/175 | N54SH | 1460-1480 (14.6-14.8) | ≥1136 (≥14.3) | ≥1751 (≥22.0) | 413-421 (52.0-53.0) | -0.120 | -0.600 | |
| S-NdFeB 415/159 | 52SH | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1512 (≥19) | 390-414(49-52) | 0.09-0.120 | 0.50-0.65 | |
| S-NdFeB 220/199 | 28UH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥1990 (≥25) | 207-231 (26-29) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 240/199 | 30UH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1990 (≥25) | 223-247 (28-31) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 260/199 | 33UH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1990 (≥25) | 247-271 (31-34) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 280/199 | 35UH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1990 (≥25) | 263-287 (33-36) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 300/199 | 38UH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1990 (≥25) | 287-310 (36-39) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 320/199 | 40UH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1990 (≥25) | 302-326 (38-41) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 335/199 | 42UH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1990 (≥25) | 318-342 (40-43) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 360/199 | 45UH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1990 (≥25) | 342-366 (43-46) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 380/199 | 48UH | 1360-1400 (13.6-14.0) | ≥1035 (≥13.0) | ≥1990 (≥25) | 358-390 (45-49) | 0.09-0.110 | 0.50-0.60 | |
| S-NdFeB 415/207 | N52UH | 1440-1460 (14.4-14.6) | ≥1120 (≥14.1) | ≥2069 (≥26.0) | 402-410 (50.5-51.5) | -0.115 | -0.500 | |
| S-NdFeB 220/239 | 28EH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2388 (≥30) | 207-231 (26-29) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 240/239 | 30EH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2388 (≥30) | 223-247 (28-31) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 260/239 | 33EH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2388 (≥30) | 247-271 (31-34) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 280/239 | 35EH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2388 (≥30) | 263-287 (33-36) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 300/239 | 38EH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2388 (≥30) | 287-310 (36-39) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 320/239 | 40EH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2388 (≥30) | 302-326 (38-41) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 335/239 | 42EH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2388 (≥30) | 318-342 (40-43) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 360/231 | 45EH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥2308 (≥29) | 342-366 (43-46) | 0.09-0.110 | 0.45-0.55 | |
| S-NdFeB 360/287 | N45AH | 1340-1350 (13.4-13.5) | ≥1039 (≥13.1) | ≥2865 (≥36.0) | 342-350 (43.0-44.0) | -0.115 | -0.400 | |
| S-NdFeB 400/247 | N50EH | 1410-1430 (14.1-14.3) | ≥1097 (≥13.8) | ≥2467 (≥31.0) | 385-392 (48.5-49.2) | -0.115 | -0.450 | |
| S-NdFeB 220/279 | 28TH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2786 (≥35) | 207-231 (26-29) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 240/279 | 30TH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2786 (≥35) | 223-247 (28-31) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 260/279 | 33TH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2786 (≥35) | 247-271 (31-34) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 280/279 | 35TH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2786 (≥35) | 263-287 (33-36) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 300/279 | 38TH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2786 (≥35) | 287-310 (36-39) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 320/279 | 40TH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2786 (≥35) | 302-326 (38-41) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 335/270 | 42TH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2706 (≥34) | 318-342 (40-43) | 0.09-0.110 | 0.40-0.50 | |
| S-NdFeB 415/135 | G-52H | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1353 (≥17) | 398-422(50-53) | 0.11-0.13 | 0.60-0.70 | |
| S-NdFeB 437/135 | G-55H | 1460-1500 (14.6-15.0) | ≥1098 (≥13.8) | ≥1353 (≥17) | 421-446 (53-56) | 0.11-0.13 | 0.60-0.70 | |
| S-NdFeB 380/159 | G-48SH | 1370-1400(13.7-14.0) | ≥1035 (≥13.0) | ≥1600(≥20) | 366-390(46-49) | 0.11-0.13 | 0.60-0.65 | |
| S-NdFeB 400/159 | G-50SH | 1400-1430 (14.0-14.3) | ≥1058 (≥13.3) | ≥1600(≥20) | 374-406(47-51) | 0.11-0.13 | 0.60-0.65 | |
| S-NdFeB 415/159 | G-52SH | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1600(≥20) | 398-422(50-53) | 0.11-0.13 | 0.60-0.65 | |
| S-NdFeB 437/159 | G-55SH | 1460-1500 (14.6-15.0) | ≥1098 (≥13.8) | ≥1600(≥20) | 421-446 (53-56) | 0.11-0.13 | 0.60-0.65 | |
| S-NdFeB 335/199 | G-42UH | 1290-1330(12.9-13.3) | ≥971 (≥12.2) | ≥1990(≥25) | 318-342(40-43) | 0.11-0.12 | 0.50-0.60 | |
| S-NdFeB 360/199 | G-45UH | 1330-1370(13.3-13.7) | ≥1003(≥12.6) | ≥1990(≥25) | 342-366(43-46) | 0.11-0.12 | 0.50-0.60 | |
| S-NdFeB 380/199 | G-48UH | 1370-1400(13.7-14.0) | ≥1035 (≥13.0) | ≥1990(≥25) | 366-390(46-49) | 0.11-0.12 | 0.50-0.60 | |
| S-NdFeB 400/199 | G-50UH | 1400-1430 (14.0-14.3) | ≥1058 (≥13.3) | ≥1990(≥25) | 374-406(47-51) | 0.11-0.12 | 0.50-0.60 | |
| S-NdFeB 415/199 | G-52UH | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1990(≥25) | 398-422(50-53) | 0.11-0.12 | 0.50-0.60 | |
| S-NdFeB 260/239 | G-33EH | 1140-1180(11.4-11.8) | ≥860 (≥10.8) | ≥2388(≥30) | 247-271(31-34) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 280/239 | G-35EH | 1180-1230(11.8-12.3) | ≥899 (≥11.3) | ≥2388(≥30) | 263-287(33-36) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 300/239 | G-38EH | 1230-1260(12.3-12.6) | ≥923 (≥11.6) | ≥2388(≥30) | 287-310(36-39) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 320/239 | G-40EH | 1260-1290(12.6-12.9) | ≥947 (≥11.9) | ≥2388(≥30) | 302-326(38-41) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 335/239 | G-42EH | 1290-1330(12.9-13.3) | ≥971 (≥12.2) | ≥2388(≥30) | 318-342(40-43) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 360/239 | G-45EH | 1330-1370(13.3-13.7) | ≥1003 (≥12.6) | ≥2388(≥30) | 342-366(43-46) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 380/239 | G-48EH | 1370-1400(13.7-14.0) | ≥1035 (≥13.0) | ≥2388(≥30) | 366-390(46-49) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 400/239 | G-50EH | 1400-1430 (14.0-14.3) | ≥1035 (≥13.0) | ≥2388(≥30) | 374-406(47-51) | 0.10-0.12 | 0.45-0.55 | |
| S-NdFeB 260/279 | G-33TH | 1140-1180(11.4-11.8) | ≥860 (≥10.8) | ≥2785(≥35) | 247-271(31-34) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 280/279 | G-35TH | 1180-1230(11.8-12.3) | ≥899 (≥11.3) | ≥2785(≥35) | 263-287(33-36) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 300/279 | G-38TH | 1230-1260(12.3-12.6) | ≥923(≥11.6) | ≥2785(≥35) | 287-310(36-39) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 320/279 | G-40TH | 1260-1290(12.6-12.9) | ≥947 (≥11.9) | ≥2785(≥35) | 302-326(38-41) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 335/279 | G-42TH | 1290-1330(12.9-13.3) | ≥971(≥12.2) | ≥2785(≥35) | 318-342(40-43) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 360/279 | G-45TH | 1330-1370(13.3-13.7) | ≥1003 (≥12.6) | ≥2706(≥34) | 342-366(43-46) | 0.095-0.11 | 0.42-0.52 | |
| S-NdFeB 430/135 | G-54H | 1440-1470 (14.4-14.7) | ≥1074 (≥13.5) | ≥1353 (≥17) | 398-422 (50-53) | 0.09-0.12 | 0.55-0.70 | |
| S-NdFeB 445/135 | G-56H | 1460-1500 (14.6-15.0) | ≥1074 (≥13.5) | ≥1274 (≥16) | 406-438 (51-55) | 0.09-0.12 | 0.55-0.70 | |
| S-NdFeB 430/159 | G-54SH | 1440-1470 (14.4-14.7) | ≥1074 (≥13.5) | ≥1592 (≥20) | 398-422 (50-53) | 0.09-0.12 | 0.50-0.65 | |
| S-NdFeB 445/151 | G-56SH | 1460-1480 (14.6-14.8) | ≥1035 (≥13.0) | ≥1512 (≥19) | 406-438 (51-55) | 0.09-0.12 | 0.50-0.65 | |
| S-NdFeB 430/191 | G-54UH | 1430-1470 (14.3-14.7) | ≥1035 (≥13.0) | ≥1910 (≥24) | 390-422 (49-53) | 0.09-0.11 | 0.50-0.60 |
Br = residual induction · Hcb = coercivity · Hcj = intrinsic coercivity · (BH)max = max energy product · αBr/βHcj = temperature coefficients
Available Geometries
We produce NdFeB in standard and custom geometries — magnetization and tolerance matched to your magnetic circuit:
- ✓Discs & cylinders — axially or diametrically magnetized
- ✓Blocks & rectangles — as-sintered or ground on all faces
- ✓Rings — radial or axial, ID/OD ground for concentricity
- ✓Arcs & segments — rotor and stator segments, skewed on request
- ✓Custom shapes — machined to your drawing, including holes and notches
Machining & Dimensional Tolerances
NdFeB is hard and abrasive — tolerances drive cost. We recommend specifying tight tolerance only where functionally required:
| Process | Typical Tolerance | Notes |
|---|---|---|
| As-sintered | ±0.1 mm | Most economical; suitable for non-critical faces |
| Sliced / profile-ground | ±0.05 mm | Standard for block and arc dimensions |
| Centerless / surface ground | ±0.02 mm | For mating faces and press-fit diameters |
| Parallelism / perpendicularity | Per drawing | Confirmed during DFM review |
Application Engineering
Where NdFeB magnets Fit
Typical component uses and the requirements to discuss before quotation. Suitability depends on your design and validation criteria.
Direct-drive wind generators
Corrosion exposure, magnetic circuit and grade selection.
Consumer electronics
Compact geometry, holding force, coating and assembly method.
Medical devices and equipment
Field requirements, thermal environment and device qualification.
Engineering Guides
Select the Grade and Coating as One System.
Coatings & Surface Protection
NdFeB contains iron and will corrode without protection. We match coating to your environment:
| Coating | Thickness | Salt Spray | Best For |
|---|---|---|---|
| Ni-Cu-Ni (standard) | 15–20µm | 48h+ | General indoor use |
| Epoxy | 15–25µm | 72h+ | Humidity, marine |
| Zinc | 8–12µm | 24h+ | Cost-sensitive, dry |
| Parylene C | 10–15µm | 240h+ | Medical, extreme |
Magnetization Patterns
We magnetize in-house and verify flux on every lot:
- ✓Axial — through thickness (most common)
- ✓Diametric — through diameter (rotor applications)
- ✓Radial — inside or outside diameter (ring magnets)
- ✓Multi-pole — 2 to 60+ poles on one face (encoders, sensors)
- ✓Skewed — angled poles for cogging reduction
Test & Quality Documentation
What ships with your magnets — scoped per project during quotation.
Magnetic Properties
Certificate of Analysis with measured Br / Hcb / Hcj / (BH)max against the specified grade, from our demagnetization-curve test equipment.
Dimensional Inspection
Dimensional reports by gauge or CMM as agreed in the inspection plan; critical dimensions identified together during DFM review.
Compliance & Project Docs
RoHS / REACH declarations, CMRT / EMRT conflict-minerals reporting on request, and FAI / PPAP documentation per project requirements.
Production & Supply Planning
NdFeB Magnets: A Defined Route to Repeat Orders
Agree the process, acceptance criteria and shipment plan before production starts. The quotation identifies the producing site and the controls required for your part.
Confirm the manufacturing route
Confirm grade, forming and sintering route, machining allowance, protective coating and magnetization direction.
Approve the inspection plan
Specify magnetic properties at the relevant temperature, dimensions, coating and corrosion-test requirements.
Qualify before repeat supply
Define sample approval, drawing revision and lot identification. Agree how material, process or site changes will be reviewed before implementation.
Plan releases and delivery
Confirm order quantities, capacity allocation, packaging and shipping terms against your forecast. Delivery dates and any buffer-stock arrangement belong in the agreed supply plan.
Frequently Asked Questions
What grade of NdFeB should I choose?
Start with the operating temperature and required flux. If your application runs below 80°C, standard N35–N52 grades work. Above 80°C, you need SH (150°C), UH (180°C), or EH (200°C) grades — these use dysprosium additions that increase cost. Our engineers can recommend the most cost-effective grade if you share your application details.
What's the maximum operating temperature really mean?
The max operating temperature is the point where irreversible flux loss exceeds 5% at the magnet's working point on the demagnetization curve. Actual safe temperature depends on the circuit's permeance coefficient — a magnet in a closed circuit tolerates more heat than one in free space. We verify temperature stability for your specific geometry during DFM review.
Can NdFeB be used outdoors or in salt environments?
Yes, with the right coating. Ni-Cu-Ni handles most indoor and mild outdoor use. For marine or salt-spray environments, epoxy or Parylene C provides superior protection. We salt-spray test coated samples per your specification before production release.
What tolerance can you hold on NdFeB parts?
As-sintered parts typically hold ±0.1mm. Centerless-ground or profile-ground parts hold ±0.02–0.05mm depending on size. Note that NdFeB is hard and abrasive — machining adds cost, so we recommend specifying tight tolerances only where functionally required.
Do you provide RoHS and REACH compliance?
Yes. All our NdFeB materials are RoHS-compliant, and we provide REACH declarations on request. We also offer conflict minerals reporting (3TG) for automotive customers requiring CMRT/EMRT forms.
Have a Drawing or Specification?
Send it to our team for engineering review and quotation — grade recommendation included.