Technical Data
N55 Technical Specifications
| Parameter | Value |
|---|---|
| Remanence (Br) | 14.5–14.8 kGs (1.45–1.48 T) |
| Coercive Force (HcB) | ≥10.5 kOe (≥836 kA/m) |
| Intrinsic Coercivity (HcJ) | ≥11 kOe (≥876 kA/m) |
| Energy Product (BHmax) | 53–55 MGOe (422–438 kJ/m³) |
| Max Operating Temperature | 60°C |
| Temperature Coefficient (Br) | -0.12 %/°C |
| Temperature Coefficient (HcJ) | -0.60 %/°C |
| Density (typical) | 7.5 g/cm³ |
| Vickers Hardness (typical) | 550–650 HV |
Values per IEC 60404-5 / GB/T 13560. Actual production values fall within the range quoted; batch-specific BH-curve data is provided on every certificate of conformance.
Overview
What Is N55?
N55 is selected when magnet volume is the binding constraint and an N52 design cannot deliver the required field within the available package. Its narrow thermal margin makes it best suited to compact robotics joints, precision actuators, and premium consumer devices where the magnet remains below 60°C.
Applications
Where N55 Is Used
N55 is specified across the following application categories. Each links to a full application brief with design requirements and recommended grade combinations.
Robotics
Radial multi-pole rings, joint-motor magnets, and high-torque servo-motor assemblies for humanoid robots, collaborative robots, and industrial robotic systems.
Industrial Automation
NdFeB magnets for stepper motors, servo drives, linear actuators, magnetic couplings, and factory automation equipment across European and North American manufacturing.
Surface Protection
Recommended Coatings for N55
Coating choice is driven by operating environment and assembly method. For N55, the typical options are:
See our NdFeB Coatings Guide for a full comparison with salt spray data and decision framework.
Specifying
Design Considerations When Specifying N55
Key insight
Maximum operating temperature is 60°C, validate internal magnet temperature and the load line at worst-case duty.
FAQ
Frequently Asked Questions
What is N55 NdFeB magnet?
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N55 is selected when magnet volume is the binding constraint and an N52 design cannot deliver the required field within the available package. Its narrow thermal margin makes it best suited to compact robotics joints, precision actuators, and premium consumer devices where the magnet remains below 60°C.
What is the maximum operating temperature of N55?
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N55 sintered NdFeB is rated for continuous operation up to 60°C. This is the practical upper limit before thermal demagnetization begins to affect performance. For a safety margin, design for a working temperature at least 20–30°C below the maximum rating.
What is the BHmax of N55?
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N55 delivers an energy product (BHmax) in the range of 53–55 MGOe (422–438 kJ/m³). This is the maximum magnetic energy density the grade can produce, measured according to standard IEC 60404-5 magnetic testing.
What applications use N55 magnets?
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N55 is typically specified for Robotics, Industrial Automation. The grade's combination of 53–55 MGOe (422–438 kJ/m³) energy product and 60°C maximum service temperature determines its fit for any given motor or actuator design.
Request a Quote for N55 Magnets
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