N35–N52 grades. SH, UH and EH temperature ratings. Ni-Cu-Ni, epoxy or Au coating. Dimensional tolerances down to ±0.02mm. The workhorse of motors, EV traction, wind turbines and high-performance industrial systems.
Six standard geometries in production, with custom dimensions engineered to your drawing.
Ø1–Ø100mm × T0.5–25mm
1–200mm × 1–100mm × 1–50mm
OD 3–200mm × ID 1–150mm × T 1–30mm
Custom segment angles up to 180°
Ø2–Ø50mm × L 2–100mm
Engineered to drawing
Vacuum induction melting → hydrogen decrepitation → jet milling → press in magnetic field → vacuum sintering → heat treatment → machining → surface coating → magnetizing → final inspection. Each step is process-controlled and recorded against your batch ID.
High-energy-density grades with Hcj ratings matched to motor operating temperature.
Large-format sintered blocks with tight magnetic uniformity across the array.
Tight tolerance arc segments for surface-mount rotor assemblies.
Miniature discs and rings for speakers, haptic motors, sensors.
Hermetic, non-contact torque transfer with zero leakage path.
Controlled-purity grades with project-specific documentation.
The tables below preserve the legacy empiremagnets.com product information and reference values. Use them for first-pass selection; final acceptance values remain project-specific.
| Application | Typical Spec | Why this material |
|---|---|---|
| EV / BLDC Motors | N42SH–N48SH | High torque density in a compact rotor |
| Sensors & Encoders | N35–N42 | Strong stable field in small packages |
| Magnetic Separators | N42–N52 | High field gradient for particle capture |
| Wind Generators | N42SH–N48SH | High energy with elevated-temperature margin |
| Acoustic Devices | N35–N45 | Compact driver magnetic circuits |
| Magnetic Couplings | N38SH–N42SH | Torque transfer through sealed barriers |
| Class | Typical reference temperature* | Selection logic | Typical applications |
|---|---|---|---|
| Standard N | ~80°C | Maximum energy density where thermal margin is modest | Speakers, fixtures, sensors, general industrial |
| M | ~100°C | Moderate added coercivity | Compact motors, actuators |
| H | ~120°C | Higher demagnetization margin | Industrial motors, generators |
| SH | ~150°C | Common automotive / traction-motor class | EV motors, wind generators, servos |
| UH | ~180°C | High-temperature compact magnetic circuits | EV/HEV, actuators, aerospace-related industrial systems |
| EH | ~200°C | Extreme thermal/demag margin | High-temperature motors and sensors |
| TH / AH | ~220–230°C class | Special high-coercivity families | Application-specific high-temperature designs |
| Grade | Br mT (kGs) | Hcb kA/m (kOe) | Hcj kA/m (kOe) | (BH)max kJ/m³ (MGOe) | αBr %/°C | βHcj %/°C | |
|---|---|---|---|---|---|---|---|
| N35 | 1180-1230 (11.8-12.3) | ≥876 (≥11) | ≥955 (≥12) | 263-287 (33-36) | 0.10-0.124 | 0.65-0.80 | Download |
| N38 | 1230-1260 (12.3-12.6) | ≥899 (≥11.3) | ≥955 (≥12) | 287-310 (36-39) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N40 | 1260-1290 (12.6-12.9) | ≥912 (≥11.5) | ≥955 (≥12) | 302-326 (38-41) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N42 | 1290-1330 (12.9-13.3) | ≥923 (≥11.6) | ≥955 (≥12) | 318-342 (40-43) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N45 | 1330-1370 (13.3-13.7) | ≥931 (≥11.7) | ≥955 (≥12) | 342-366 (43-46) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N48 | 1370-1400 (13.7-14.0) | ≥939 (≥11.8) | ≥955 (≥12) | 366-390 (46-49) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N50 | 1390-1430 (13.9-14.3) | ≥947 (≥11.9) | ≥955 (≥12) | 374-406 (47-51) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N52 | 1420-1460 (14.2-14.6) | ≥947 (≥11.9) | ≥955 (≥12) | 390-414 (49-52) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N54 | 1450-1490 (14.5-14.9) | ≥912 (≥11.5) | ≥955 (≥12) | 406-438 (51-55) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| N56 | 1480-1520 (14.6-15.2) | ≥860 (≥10.8) | ≥876 (≥11) | 422-454 (52-57) | 0.10-0.124 | 0.65-0.80 | Datasheet |
| 35M | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1114 (≥14) | 263-287 (33-36) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 38M | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1114 (≥14) | 287-310 (36-39) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 40M | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1114 (≥14) | 302-326 (38-41) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 42M | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1114 (≥14) | 318-342 (40-43) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 45M | 1330-1370 (13.3-13.7) | ≥1002 (≥12.6) | ≥1114 (≥14) | 342-366 (43-46) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 48M | 1370-1400 (13.7-14.0) | ≥1027 (≥12.9) | ≥1114 (≥14) | 366-390 (46-49) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 50M | 1390-1430 (13.9-14.3) | ≥1035 (≥13.0) | ≥1114 (≥14) | 374-406 (47-51) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 52M | 1420-1460 (14.2-14.6) | ≥995 (≥12.5) | ≥1114 (≥14) | 390-414 (49-52) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 54M | 1450-1490 (14.5-14.9) | ≥995 (≥12.5) | ≥1114 (≥14) | 406-438 (51-55) | 0.10-0.124 | 0.60-0.75 | Datasheet |
| 30H | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1353 (≥17) | 223-247 (28-31) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 33H | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1353 (≥17) | 247-271 (31-34) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 35H | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1353 (≥17) | 263-287 (33-36) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 38H | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1353 (≥17) | 287-310 (36-39) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 40H | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1353 (≥17) | 302-326 (38-41) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 42H | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1353 (≥17) | 318-342 (40-43) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 45H | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1353 (≥17) | 342-366 (43-46) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 48H | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1353 (≥17) | 366-390 (46-49) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 50H | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1353 (≥17) | 374-406 (47-51) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 52H | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1353 (≥17) | 390-414 (49-52) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 54H | 1450-1490 (14.5-14.9) | ≥1074 (≥13.5) | ≥1274 (≥16) | 406-438 (51-55) | 0.09-0.120 | 0.55-0.70 | Datasheet |
| 30SH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1592 (≥20) | 223-247 (28-31) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 33SH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1592 (≥20) | 247-271 (31-34) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 35SH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1592 (≥20) | 263-287 (33-36) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 38SH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1592 (≥20) | 287-310 (36-39) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 40SH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1592 (≥20) | 302-326 (38-41) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 42SH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1592 (≥20) | 318-342 (40-43) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| N42SH-HRE | 1310-1330 (13.1-13.3) | ≥1020 (≥12.8) | ≥1671 (≥21.0) | 333-341 (42.0-43.0) | -0.125 | -0.600 | Download |
| 45SH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1592 (≥20) | 342-366 (43-46) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 48SH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1592 (≥20) | 366-390 (46-49) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 50SH | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1592 (≥20) | 374-406 (47-51) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| 52SH | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1512 (≥19) | 390-414 (49-52) | 0.09-0.120 | 0.50-0.65 | Datasheet |
| N54SH | 1460-1480 (14.6-14.8) | ≥1136 (≥14.3) | ≥1751 (≥22.0) | 413-421 (52.0-53.0) | -0.120 | -0.600 | Download |
| 28UH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥1990 (≥25) | 207-231 (26-29) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 30UH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1990 (≥25) | 223-247 (28-31) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 33UH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1990 (≥25) | 247-271 (31-34) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 35UH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1990 (≥25) | 263-287 (33-36) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 38UH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1990 (≥25) | 287-310 (36-39) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 40UH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1990 (≥25) | 302-326 (38-41) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 42UH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1990 (≥25) | 318-342 (40-43) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 45UH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1990 (≥25) | 342-366 (43-46) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| 48UH | 1360-1400 (13.6-14.0) | ≥1035 (≥13.0) | ≥1990 (≥25) | 358-390 (45-49) | 0.09-0.110 | 0.50-0.60 | Datasheet |
| N52UH | 1440-1460 (14.4-14.6) | ≥1120 (≥14.1) | ≥2069 (≥26.0) | 402-410 (50.5-51.5) | -0.115 | -0.500 | Download |
| 28EH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2388 (≥30) | 207-231 (26-29) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 30EH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2388 (≥30) | 223-247 (28-31) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 33EH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2388 (≥30) | 247-271 (31-34) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 35EH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2388 (≥30) | 263-287 (33-36) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 38EH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2388 (≥30) | 287-310 (36-39) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 40EH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2388 (≥30) | 302-326 (38-41) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 42EH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2388 (≥30) | 318-342 (40-43) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| 45EH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥2308 (≥29) | 342-366 (43-46) | 0.09-0.110 | 0.45-0.55 | Datasheet |
| N45AH | 1340-1350 (13.4-13.5) | ≥1039 (≥13.1) | ≥2865 (≥36.0) | 342-350 (43.0-44.0) | -0.115 | -0.400 | Download |
| N50EH | 1410-1430 (14.1-14.3) | ≥1097 (≥13.8) | ≥2467 (≥31.0) | 385-392 (48.5-49.2) | -0.115 | -0.450 | Download |
| 28TH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2786 (≥35) | 207-231 (26-29) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 30TH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2786 (≥35) | 223-247 (28-31) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 33TH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2786 (≥35) | 247-271 (31-34) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 35TH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2786 (≥35) | 263-287 (33-36) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 38TH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2786 (≥35) | 287-310 (36-39) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 40TH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2786 (≥35) | 302-326 (38-41) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 42TH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2706 (≥34) | 318-342 (40-43) | 0.09-0.110 | 0.40-0.50 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| 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 | Datasheet |
| Process | Typical Tolerance | Notes |
|---|---|---|
| As-sintered | ±0.1 mm | Most economical for non-critical faces |
| Sliced / profile-ground | ±0.05 mm | Standard for blocks and arc dimensions |
| Centerless / surface ground | ±0.02 mm | Mating faces and press-fit diameters |
| Parallelism / perpendicularity | Per drawing | Confirmed during DFM review |
| Coating | Typical Thickness | Reference Salt Spray | Typical Use |
|---|---|---|---|
| Ni-Cu-Ni | 15–20 µm | 48 h+ | General indoor / protected applications |
| Epoxy | 15–25 µm | 72 h+ | Humidity / marine-oriented protection |
| Zinc | 8–12 µm | 24 h+ | Cost-sensitive dry environments |
| Parylene C | 10–15 µm | 240 h+ | High-protection / specialty applications |
Open the exact grade specification directly from this product page.
Reference values are reproduced from the legacy product pages. Confirm grade, test method, tolerance, coating, temperature class and inspection criteria against the released drawing and purchase specification.
A visual record of magnetic material and assembly manufacturing, inspection and packing.
Manufacturing 
Manufacturing 
Manufacturing 
Manufacturing 
Inspection 
Packing NdFeB is usually selected when the package needs high magnetic output in a small volume. Grade, geometry, working temperature, corrosion environment and the demagnetizing field must be reviewed together.
A drawing alone may not define the magnetic requirement. These inputs help us recommend the right grade, geometry, coating and inspection plan instead of quoting a generic part.
Share the air gap, pole geometry, target flux or force, and the nearby steel path. A grade number alone is not enough to confirm performance.
Provide continuous, peak and dwell temperatures at the magnet, not only the ambient temperature. Include start-up and fault conditions when relevant.
State humidity, salt, chemicals, vacuum, cleaning agents and whether the finished part will be edge-sealed or encapsulated.
Show orientation, pole count, adhesive, insertion force, fixturing and any shock or high-speed loads applied after magnetizing.
Inspection scope should follow the failure mode. We can align the report format, sample quantity and release criteria during drawing review.
Agree on the measured property, test method, sample quantity and acceptance band for Br, Hcj, flux, pull force or torque.
For H, SH, UH or EH selections, define the temperature exposure and the post-exposure magnetic acceptance criterion.
Confirm coating system, thickness range, adhesion method and environmental test requirement before production release.
Identify critical faces, datum scheme, flatness, chamfer and coating allowance so the inspection report matches the drawing.
No. The highest nominal energy product may not be the best choice once temperature, coercivity, cost, corrosion protection and working point are considered. We recommend selecting against the magnetic circuit and operating profile.
High-temperature grades can be reviewed for the application. The suitable grade depends on the magnet temperature and required irreversible-loss margin; confirm the exact grade and limits during engineering review.
A drawing, material or grade preference, magnetizing direction, operating temperature, environment, annual volume, first order quantity and any inspection or coating requirements.