40mm Neodymium Magnet

40 mm Neodymium Magnet – Product Overview

Our 40 mm Neodymium Magnet is a precision-engineered block made from Nd-Fe-B (neodymium-iron-boron), designed to deliver strong and stable magnetic performance in demanding industrial applications. With a compact 40 × 40 × 20 mm size and a high-grade N52 alloy, this magnet fits neatly into assemblies such as motor modules, fixture systems, and positioning units without compromising strength.

Manufacturers, OEMs, and assembly line integrators trust this model because it offers excellent magnetic energy, consistent dimensions, and reliable plating-all backed by rigorous testing and quality control.

	Material	Nd-Fe-B (Neodymium Iron Boron)
	Grade	N52 (other grades available on request)
	Dimensions	40 mm × 40 mm × 20 mm
	Weight	243.2 g
	Magnetization Direction	Through 20 mm thickness (axial)
	Coating	Nickel-Copper-Nickel (Ni-Cu-Ni) finish for corrosion resistance
	Certifications	ISO9001, TS16949, RoHS, SGS

• High Magnetic Energy: The N52 grade provides strong magnetic flux in a relatively small block, making this 40 mm neodymium magnet a go-to for engineers designing high-performance assemblies.
• Dimensional Stability: The 20 mm thickness paired with the square profile ensures uniform magnetic distribution and less variation between parts.
• Wide Use Cases: Ideal for motor rotor or stator inserts, precision magnetic chucks or fixtures, positioning devices, and automated tooling systems where reliable magnetic holding is critical.
• Custom Flexibility: We offer tailored versions of this magnet to meet specific project needs - adjust the size, magnetization direction, or even the coating to match your operational environment.

We handle both sample production and bulk orders of this 40 mm block magnet. Using a process that includes vacuum sintering, precision cutting, and flux measurement, we ensure that each magnet meets strict tolerances. For clients who need custom magnet configurations, we accept CAD or technical drawings and can adapt dimensions, surface finish, or magnetization polarities. Each production batch is traceable, and we can provide batch-specific test reports for magnetic strength and physical dimensions.

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Designed for Your Application

Every magnet undergoes detailed inspection: Magnetic flux and residual induction (Br) measured Dimensional checks to ensure tolerance (typically ± 0.1 mm or better) Coating adhesion and corrosion resistance verified through testing Full traceability with batch numbers that tie back to inspection reports This level of quality control gives procurement teams confidence in using these magnets in mission-critical or high-volume industrial applications.

 

We support custom magnet development and bulk order fulfillment alike. Our engineers will work with you to review drawings, advise on magnet grade and coating, and recommend packaging for safe transport. Prototype units can be supplied for validation before committing to volume production. We also offer technical guidance on how best to integrate the magnet into your system.

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