Reference table based on general industry practice; actual selection depends on customer engineering calculations (magnetic circuit, temperature, vibration, lifespan). Source: Manufacturer technical datasheets and industry guidelines. Gauss (Br) refers to Residual Induction value.
| Industry / Sector | Sub-Application | Magnet Shape / Type | Typical Dimensions | Common Grade(s) | Gauss (Br) Range | Temperature Class Rationale | Magnetization Direction |
|---|---|---|---|---|---|---|---|
| Electric / Servo Motors | BLDC/Servo Rotor Magnet (Arc/Segment) | Arc Segment (Curved Surface) | L: 20-80mm, T: 2-6mm (Rotor-dependent) | N42, N45, N42SH | 12,900 - 13,700 Gauss | Continuous 80-150°C motor temp; SH/UH required for industrial/automotive | Radial (Single pole or multi-pole segment) |
| Electric / Servo Motors | BLDC/Servo Rotor - Single Piece Ring | Ring (Multi-pole) | OD: 15-60mm, ID: Proportional, T: 5-15mm | N38SH, N42SH, N40UH | 12,200 - 13,300 Gauss | Continuous operating temperature 100-180°C | Diametrical Multi-Pole (Radial Multi-Pole) |
| Electric / Servo Motors | Servo Motor Encoder / Position Sensor | Small Disc | Dia: 6-15mm, T: 2-4mm | N35, N42 | 11,800 - 13,300 Gauss | Inside electronics housing, moderate temp (60-80°C) sufficient | Diametrical |
| Machinery & Automation | Sensor / Reed Switch Triggering | Small Disc | Dia: 3-10mm, T: 1-3mm | N35, N42 | 11,800 - 13,300 Gauss | Ambient room temperature (Control panels) | Axial |
| Machinery & Automation | Fixtures & Workpiece Clamping | Block or Countersunk Disc | Dia/Side: 15-50mm, T: 5-15mm | N42, N45 | 12,900 - 13,700 Gauss | Machine tool environment; coolant-resistant coating required | Axial |
| Machinery & Automation | Conveyor / Sorting Line Separation | Large Disc | Dia: 20-40mm, T: 5-10mm | N42, N45 | 12,900 - 13,700 Gauss | Continuous duty, moderate temperature | Axial |
| Magnetic Separation | Magnetic Tube / Rod Separator | Large Disc | Dia: 20-50mm, T: 10-30mm | N42, N45 | 12,900 - 13,700 Gauss | Hygienic stainless steel housing required for food/pharma | Axial (Stacked inside tube) |
| Magnetic Separation | Grate / Plate Separator | Large Block / Plate | L x W: 40-100mm, T: 10-25mm | N42, N45 | 12,900 - 13,700 Gauss | Standard, but coating critical in abrasive environments | Axial |
| Defense Subcontractors | Precision Sensors / Actuators / Guidance | Small-Medium Disc (Tight Tolerance) | Dia: 5-25mm | N48, N50, N52 | 13,700 - 14,800 Gauss | High energy density in compact spaces. Shock + temp swings require SH/UH/EH | Axial or Diametrical |
| Home Appliances (OEM) | Small DC Motor (Blenders, Hair Dryers) | Block / Arc Segment or Small Ring | L: 10-30mm, T: 2-5mm | N35, N38, N42 | 11,800 - 13,300 Gauss | Inside motor housing 60-100°C; cost-effective grades preferred | Radial Segment / Multi-Pole Ring |
| Elevator Equipment | Gearless Traction Motor Rotor | Large Arc Segment / Block | L: 40-100mm, T: 8-20mm | N42SH, N45SH | 12,900 - 13,700 Gauss | Heating under continuous load; SH class widely standard | Radial Segment |
| Robotics & AGVs | Servo / Stepper Motor Rotor | Arc Segment or Ring | L: 15-50mm / Ring Dia: 15-40mm | N42SH, N45SH | 12,900 - 13,700 Gauss | Continuous operation + compact design requires SH grade | Radial / Multi-Pole |
| Medical Devices | Position Sensor / Cover Switch | Small Disc (Tight Tolerance) | Dia: 3-12mm | N42, N48, N52 | 12,900 - 14,800 Gauss | Miniaturization priority. Autoclave sterilization (~134°C) requires M/H grade | Axial or Diametrical |
| Acoustics & Speakers | Woofer / Mid-range Driver Magnet | Large Ring | OD: 40-120mm, T: 10-25mm | N42, N48 (SH) | 12,900 - 14,100 Gauss | Heating under continuous sound power; high power requires SH | Axial |