Products > Sintered Magnets > Sintered NdFeB Magnets

Sintered Neodymium-Iron-Boron (NdFeB) Magnets

The world’s highest energy density permanent magnet. Engineered for maximum performance in industrial motors, generators, and precision sensors where compact size and extreme magnetic strength are critical.

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View Technical Data

Remanence

Up to 1.52T

Grade Range

N35–N52 / M–EH

Certification

ISO 9001:2015

Tolerance

±0.05mm

Max Temp

200°C (EH)

Supply

Factory Direct

Product Overview

The World’s Highest Energy Density Permanent Magnet

Sintered Neodymium-Iron-Boron (NdFeB) magnets are manufactured through a powder metallurgy process. The raw materials are melted under vacuum, pulverized into fine powder, pressed into a magnetic field, and then sintered to achieve full density and peak magnetic properties.

Our sintered NdFeB magnets offer unparalleled remanence (Br) and energy product (BH)max, making them the preferred choice for high-torque motors, high-efficiency generators, and compact sensor assemblies. We provide a full spectrum of grades from N35 to N52, including specialized high-coercivity (H, SH, UH, EH) versions for high-temperature stability.

Wide grade range (N35-N52) with high remanence up to 1.52T
Multi-coating options: Ni-Cu-Ni, Zinc, Gold, Epoxy, Parylene
Complex shapes achieved via wire EDM and precision diamond slicing
Fully RoHS and REACH compliant
Global OEM supply for industrial and automotive sectors

Manufacturing Excellence

Production Process Flow

Alloy Smelting

Vacuum induction melting of raw materials.

Strip Casting

Rapid cooling to form thin alloy strips.

Jet Milling

Pulverizing strips into micron-sized powder.

Pressing

Axial or Isostatic pressing in magnetic field.

Sintering

High-temp sintering and annealing.

Machining

Wire EDM, slicing, and grinding to shape.

Coating

Surface treatment for corrosion resistance.

Testing

100% magnetic flux and QC testing.

Technical Data

Magnetic Grades & Properties

Grade	Br (T)	Hcb (kA/m)	Hcj (kA/m)	(BH)max (kJ/m³)	Max Temp (°C)
N35	1.17–1.22	868+	955+	263–287	80
N42	1.29–1.32	915+	955+	318–342	80
N52	1.43–1.48	876+	876+	390–422	80
35M	1.17–1.22	868+	1114+	263–287	100
35H	1.17–1.22	868+	1353+	263–287	120
33SH	1.13–1.17	836+	1592+	247–271	150
28UH	1.02–1.08	764+	1990+	207–231	180
28EH	1.02–1.08	764+	2388+	207–231	200

Physical Specifications

Density	7.5–7.6 g/cm³
Hardness (Vickers)	550–650 HV
Flexural Strength	250 MPa
Dimensional Tolerance	±0.05mm (std) / ±0.02mm (precision)
Available Shapes	Block, Disc, Ring, Arc, Cylinder, Custom
Coating Options	Ni-Cu-Ni, Zn, Au, Ag, Epoxy, Parylene
Compliance	RoHS, REACH compliant

Shapes & Magnetization

Standard and Custom Geometric Shapes

Common Magnetization Orientations

Engineering Note: Wire EDM and diamond slicing enable complex cross-sections impossible with bonded magnets. Our facility specializes in high-precision grinding and slicing to achieve ±0.02mm tolerances for high-speed motor rotors.

Applications

Critical Industries & Use Cases

EV & Hybrid Motors

High-coercivity UH/EH grades for traction motors requiring extreme torque density and thermal stability.

Wind Turbines & Generators

Large block magnets for direct-drive permanent magnet generators (PMG) in renewable energy systems.

Industrial Servo Motors

High-performance NdFeB for industrial automation, CNC machinery, and high-response robotics.

Magnetic Separators

N52 grade blocks and cylinders for cross-belt and drum separators in mining and recycling.

MRI & Medical Imaging

Precision-graded magnets for high-homogeneity magnetic fields in medical diagnostic equipment.

Robotics & Precision Motion

Micro-magnets for robotic actuators, haptic feedback systems, and precision linear stages.

Why Elite Magnets

Our B2B Supply Advantages

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Factory Direct

Direct-from-factory pricing with no intermediary markups. Full control over production schedules.

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100% Flux QC

Every batch undergoes rigorous magnetic testing. Helmholtz coil and fluxgate reports provided.

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Wide Grade Stock

We maintain inventory of standard N35/N42/N52 blocks and discs for immediate shipment.

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Fast Prototyping

Custom samples delivered in 10-14 days using our rapid-response precision machining cell.

Frequently Asked Questions

What grades do you stock for immediate shipment?

We maintain stock of standard N35 and N42 grades in popular disc and block sizes. High-grade N52 and high-temp SH/UH grades are typically produced to order with a 15-20 day lead time.

What is the maximum size you can produce?

The maximum size for a single sintered NdFeB block is approximately 150mm x 100mm x 50mm, limited by the pressing equipment capacity. Larger assemblies can be created by bonding segments together.

How do you prevent corrosion on sintered NdFeB?

Since sintered NdFeB is prone to oxidation, we offer various coatings including Ni-Cu-Ni (most common), Zinc, Epoxy (excellent for salt spray resistance), and Parylene (for medical or vacuum applications).

Can you supply with third-party inspection (SGS, BV, TÜV)?

Yes, we regularly work with SGS and BV for pre-shipment inspections. We can also provide full RoHS and REACH compliance documentation for every batch.

What is the lead time for custom sintered NdFeB magnets?

Typical lead times are 7-10 days for prototypes and 20-30 days for mass production, depending on the complexity of the shape and the coating requirements.

Get Sintered NdFeB Magnet Pricing

Consult with our magnetics engineers for your next project. We provide technical optimization and volume pricing for B2B procurement.

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ISO 9001:2015 RoHS Compliant REACH Certified IATF 16949