Application
Electric Motor Magnets: Sourcing Guide and RFQ Checklist
NdFeB motor magnets tuned for torque density and thermal stability.
Published on 2026/02/16
Last updated on 2026/02/16
Highlights
- Rotor segment and arc support for motor stacks
- Grade selection for temperature and demag margin
- Coating guidance for humidity and coolant exposure
Product Gallery
EV motor with permanent magnets
Overview
Provide rotor geometry, operating temperature, and target torque. We coordinate grade and coating recommendations with Ganzhou suppliers.
Application requirements
- Motor type, rotor geometry, and pole count
- Operating temperature range and duty cycle
- Target torque or magnetic flux requirements
- Air gap and stack length constraints
- Magnetization direction and segment orientation
- Corrosion environment and coating needs
Recommended grades
- N42-N48 for standard traction motors
- N48H-N50H for elevated temperature duty
- N52 for maximum torque when temperature allows
- SmCo alternatives for 200C+ environments
Recommended coatings
- NiCuNi for general corrosion protection
- Epoxy for high humidity or salt exposure
- Custom coating when coolant exposure is expected
Applications
- Electric motors and generators
- Industrial automation and robotics
- Magnetic sensors and actuators
- Material handling and fixtures
- Energy and mobility systems
RFQ Checklist
- Drawing or dimensions with tolerances
- Target grade/strength and operating temperature
- Coating requirements and environment conditions
- Quantity, MOQ, and annual demand
- Application context and magnetization direction
Reference Guides
Procurement-ready guides covering grades, coatings, QC, and RFQ prep.
View all resourcesFAQ
What should I include in an RFQ for neodymium magnets for electric motors?
Share rotor geometry, operating temperature, target torque, and magnetization direction so suppliers can validate neodymium magnets for electric motors against the right grade window.
Can you supply motor rotor segments or arcs?
Yes. Provide the segment dimensions and pole count. We coordinate feasibility with suppliers.
Which grades are typical for traction motors?
N42-N50H grades are common. Final selection depends on temperature and demag margin.
Case studies
Industrial Automation - Servo motors
Arc Segment Magnets for Industrial Servo Motor Upgrade
Replacing ferrite arc segments with NdFeB N45H arc magnets to increase torque density in servo motors.
EV Motors - Rotor assemblies
EV Motor Rotor Magnets with Tight Tolerance Control
Reducing scrap and lead time for EV motor rotor assemblies using N42SH NdFeB magnets.
Buyer feedback
Recent RFQ and sourcing coordination highlights.
The RFQ response included grade and coating options with clear lead times.
Marcus Reed
Procurement Manager - EV Motor OEM
Drawing review was fast and the quote matched our tolerance targets.
Ana Soto
Sourcing Lead - Industrial Automation
Inspection data and material declarations were available when requested.
Ravi Menon
Quality Engineer - Appliance Supplier
Trusted by buyer segments
OEM and industrial teams sourcing NdFeB and SmCo magnets.
Request a Quote
Get a Quote
Send your drawing, grade, coating, and quantity. We coordinate a supplier quote and follow up with confirmed specs.
Product data is sourced from partner suppliers and confirmed per order.
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