Magnets for Servo Motors：Why Tight Dimensional Tolerance Matters More Than Grade
When a servo motor designer specifies a rotor magnet, the conversation almost always starts with magnet grade — N38, N42SH, N48UH. Grade...
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Engineering guidance, grade selection, export compliance, and quality documentation for NdFeB magnet procurement.
Understanding NdFeB Temperature Coefficients：α and β Explained for Motor Designers
Every sintered NdFeB magnet loses performance as it heats up. For a motor designer, the question is never whether that happens—it’s how...
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Rare Earth Weekly：Nd/Pr Oxide Pricing and Supply Update—July 2026
Neodymium-praseodymium (Nd/Pr) oxide — the main raw material behind every sintered NdFeB magnet — is trading around 760,000–766,000 yuan/mt in mid-July 2026...
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How to Write an NdFeB Magnet RFQ That Gets Useful Responses
Most magnet quotes come back slow or wrong for one reason: the RFQ didn’t say enough. “I need a strong 20 mm...
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NdFeB Salt Spray Testing：What the Hours Actually Mean for Your Application
Salt spray testing is the most widely cited measure of corrosion resistance for sintered NdFeB magnets — yet the hours on a...
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BLDC Motor Magnets ：Arc Segment vs Block vs Ring ——Which Geometry Works for Your Rotor？
The magnet geometry you choose for a brushless DC (BLDC) or permanent-magnet synchronous (PMSM) rotor is one of the earliest and most...
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Grain Boundary Diffusion（GBD）Technology Explained：How It Achieves High Hcj Without Dy/Tb
Coercivity (Hcj) is what keeps a permanent magnet stable when the temperature climbs. In a traction motor at 150 °C, or a...
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What Should Be in Every NdFeB Magnet Shipment Document Package？
A magnet shipment rarely gets held at customs because of the magnets themselves. It gets held because one document in the package...
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How China’s April 2025 Dual-Use Export Controls Are Reshaping Global Magnet Supply Chains
Introduction On April 4, 2025, China’s Ministry of Commerce issued Announcement No. 18, imposing export licensing requirements on seven medium and heavy...
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