Product
Sintered NdFeB Magnets for Performance-Critical Assemblies
Plan sintered NdFeB sourcing with clearer assumptions on grade family, thermal margin, coating durability, and manufacturable geometry.
Published on 2026/02/15
Last updated on 2026/02/15
Highlights
- Higher magnetic energy density than bonded NdFeB for compact assemblies
- Grade-family guidance across N, H, SH, UH, and EH thermal ranges
- RFQ checklist focused on sintering, machining, and coating risk controls
Product Gallery
Disc magnets in various sizes
Overview
Sintered NdFeB magnets are selected when projects need strong magnetic performance in compact volume, but procurement risk rises quickly when grade, temperature, and machining limits are not defined early. This page helps engineering and sourcing teams convert partial requirements into an RFQ-ready package before quote comparison.
Specifications
| Material system | Sintered NdFeB (Nd2Fe14B rare-earth permanent magnet) |
| Typical grade families | N35-N52 plus H/SH/UH/EH variants by thermal requirement |
| Operating temperature window | Commonly ~80C to ~200C depending on selected grade family |
| Coating options | Ni-Cu-Ni, zinc, epoxy, and custom systems by environment |
| Magnetization patterns | Axial, diametral, radial, and multipole with fixture validation |
| Tolerance baseline | Typically +/-0.05 mm; tighter classes confirmed by drawing |
| MOQ and lead time | Confirmed after geometry, grade family, and volume review |
Applications
- EV traction and auxiliary motor assemblies
- Industrial servos, robotics, and automation tooling
- Magnetic sensors, encoders, and precision actuators
- High-force holding fixtures in compact installations
- Energy equipment, pumps, and coupling systems
- Performance electronics and miniaturized mechanisms
Customization Options
- Grade-family selection based on force, thermal drift, and demagnetization risk
- Geometry optimization for pressing orientation and machining feasibility
- Magnetization direction, polarity map, and fixture requirements by assembly
- Coating strategy based on humidity, salt spray, and handling exposure
- Packaging, lot traceability, and polarity labeling for production receiving
Sourcing Support
- Do not lock to headline grade only; align thermal profile and coercivity margin first.
- Early drawing review should flag fragile corners, thin walls, and machining hotspots for sintered parts.
- Supplier comparisons should normalize grade family, coating stack, and inspection scope before price ranking.
- For partial inputs, start with performance target + operating window, then stage remaining RFQ details.
Shipping Notes
- Strong sintered parts require magnetic shielding and safe spacing for transport handling.
- Brittle geometries should use edge-protected trays or partitions to reduce chip risk.
- Package labels should include polarity orientation and high-field handling warnings.
Compliance Notes
- RoHS/REACH declarations and material statements can be requested per program scope.
- Inspection packages can include magnetic, dimensional, and visual checkpoints for incoming QC.
- Traceability expectations (lot ID, packing labels, retention period) should be fixed before PO release.
Lead Time Notes
- Lead time depends on grade family, geometry complexity, coating queue, and magnetization fixture setup.
- Prototype and pilot lots are available to validate process assumptions before production scale-up.
- Expedite requests are evaluated against technical risk, not only calendar urgency.
Need a quote-ready specification review?
Share your drawing, grade target, coating, and quantity. We align supplier feasibility before full RFQ submission.
RFQ Checklist
- Target flux or pull-force requirement under real assembly air-gap condition
- Continuous and peak operating temperature with exposure duration details
- Drawing with critical dimensions, tolerances, and fragile feature callouts
- Magnetization direction, polarity orientation, and pairing/matching rules
- Coating target with corrosion environment and handling constraints
- Volume plan (prototype, pilot, mass production) plus required documents
Reference Guides
Procurement-ready guides covering grades, coatings, QC, and RFQ prep.
View all resourcesFAQ
What is the main difference between sintered and bonded NdFeB?
Sintered NdFeB usually delivers higher magnetic energy and strength density, while bonded NdFeB can offer easier shaping with lower peak magnetic performance.
Do we always need the highest grade for sintered NdFeB projects?
Not always. Grade should be selected with temperature, coercivity margin, and lifecycle reliability, not only room-temperature pull force.
Why do sintered parts often need extra care in machining and handling?
Sintered magnets are hard but brittle, so thin walls, sharp corners, and poor handling can increase chip risk and yield loss if not controlled early.
What RFQ details most improve quote quality for this page?
The highest-impact inputs are thermal profile, geometry tolerance, magnetization pattern, coating expectation, and stage-by-stage volume plan.
Case studies
HVAC - Linear actuator assemblies
Block Magnets for HVAC Linear Actuator Production Line
Scaling from 500 to 10,000 pcs/month of N35 block magnets for HVAC damper actuators while reducing unit cost by 18%.
Subsea / Marine - Magnetic coupling for ROV thrusters
Magnetic Assembly for Underwater ROV Thruster Coupling
Custom magnetic coupling assembly using N42 NdFeB ring magnets with epoxy coating for subsea ROV thruster applications.
Quote Calculator
Estimate lead time and prepare a precise RFQ.
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
RFQ checklist
- Dimensions and shape (include drawing if possible).
- Grade and operating temperature range.
- Coating or surface treatment requirements.
- Quantity, target price, and delivery schedule.
- Tolerance, magnetization direction, and application notes.
Spec sheet downloads
Reference assets to speed up RFQ prep. Confirm specs before ordering.
NdFeB spec sheet (reference)
Grades, coatings, and RFQ checklist for NdFeB magnets.
SmCo spec sheet (reference)
High-temperature SmCo summary and RFQ checklist.
Ferrite spec sheet (reference)
Cost-optimized ferrite basics and RFQ checklist.
Alnico spec sheet (reference)
High-temperature Alnico grades and RFQ checklist.
Bonded NdFeB spec sheet (reference)
Bonded NdFeB process notes and RFQ checklist.
Flexible rubber magnet spec sheet (reference)
Flexible magnet tape basics and RFQ checklist.
Magnetic assembly spec sheet (reference)
Pot magnet assembly fundamentals and RFQ checklist.
Trust & Compliance
Certifications and QC checkpoints aligned to industrial procurement.
ISO 9001
Quality management system
RoHS
Restricted substances compliance
REACH
SVHC compliance on request
Factory Capability
- Custom shapes and grades per drawing
- Tolerances confirmed by supplier QC
- Coating options: Ni-Cu-Ni, Zinc, Epoxy
QC Process
- Raw material verification and grade checks
- Dimensional inspection to critical tolerances
- Surface and coating integrity inspection
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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