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Magnet quality

Performance & Quality you can trust

Reliable Neodymium Magnets Company

Good Power magnetic products Limited

At our neodymium magnet manufacturing facility, we utilize advanced equipment and rigorous procedures to ensure only the highest quality magnets leave our factory.

Omni-directional neodymium magnet quality control

By thoroughly testing each batch, we can stand behind the quality of our neodymium magnets.

Sample testing

Once the magnets are magnetized, samples from each batch are tested for gauss, flux, and permeability. This verifies consistency within the batch.

Temperature resistance

Magnets are placed in the demagnetization oven in groups. They are slowly heated and then checked for changes in magnetic strength.

Adhesion

The nickel-copper-nickel coating is analyzed for proper adhesion and coverage. This protects the magnets from corrosion.

Dimensions

Using calipers and micrometers, the dimensions of each magnet are checked against specifications. This ensures consistency in size.

Packaging

Magnets are packaged properly to avoid chipping and cracks during shipping. Packages are clearly labeled with contents.

Size & Appearance Inspection

Manual inspection alone can’t match our standards for accuracy, efficiency and cost-competitiveness. Therefore, we employ advanced automated inspection systems to swiftly and precisely gauge multiple dimensions and visual flaws, rejecting defects while sustaining high productivity outpacing manual methods.

Measurement Dimension

We meticulously measure magnets at all manufacturing stages, using calipers and micrometers to detect any dimensional deviations from specifications. This constant precision analysis allows us to take corrective actions when needed, ensuring magnets conform to critical size, shape and tolerance requirements for optimal functioning.

Inspection Appearance

We thoroughly inspect for defects like cracks, nicks, shape abnormalities, finish issues, and coating inconsistencies, to identify problems early and guarantee only the highest quality magnets leave our factory.

Measurement of Tensile Force and Gauss

Tensile strength test

By measuring the force needed to detach magnets from ferromagnetic metals like steel, we simulate real-world holding conditions. Quantifying this tensile force gives us key insights into the magnet’s gripping and lifting capacity for tasks like affixing objects. This controlled testing reliably predicts field performance.

Magnetic field test

We meticulously measure the magnetic field strength of each neodymium magnet batch to verify they meet the specified grade and quality standards. This consistent magnetic field testing guarantees reliable, uniform performance across production runs, upholding the consistency customers expect.

Plating Measurement

Salt spray test

We assess coating and plating corrosion resistance by exposing magnets to calibrated saltwater sprays, then examining corrosion levels over time. This controlled testing validates the durability of protective coatings and platings in real-world salty, humid environments.

Plating thickness test

By verifying plating thicknesses meet specifications, we guarantee sufficient protection and functionality for the intended application. Our controlled testing validates optimal plating depths for the operating conditions.

Hardness Test

Our magnet hardness assessment involves subjecting the magnet to controlled pressure, measuring its resistance to deformation. This ensures the magnet’s durability and suitability for its intended application.

Temperature Resistance & Thermal Stability

Temperature Test

We assess neodymium magnets’ temperature durability by testing in controlled chambers across high and low temperature extremes, beyond operating limits. Incrementally measuring magnetic strength at each temperature quantifies performance falloffs and structural integrity, validating stability for real-world thermal variations.

Quality Inspection Process Table

Processing	Tools/Machines	Inspection Purpose	Disc	Ring	Block	Arc	Irregular
Sintered Blank Magets	Micrometer/Caliper	to check the size	√	√	√	√	√
Sintered Blank Magets	Electromagnetic tester	demagnization curve analysis to check the performance of magnetic properties	√	√	√	√	√
Machining Process	Micrometer	to check the size	√	√	√	√	√
Machining Process	Gauge	to check the size		√		√	√
Machining Process	Projector	to check the size		√		√	√
Machining Process	Human inspection	to check the appearance any defects	√	√	√	√	√
Finished Magnets	Thickness meter	to test the thickness of magnet surface electroplating	√	√	√	√	√
Finished Magnets	Drop test	to test the adhesion of magnet surface electroplating	√	√	√	√	√
Finished Magnets	Salt spray tester	to test the corrosion resistance of magnet surface plating.	√	√	√	√	√
Finished Magnets	Thermal shock test	Stability test of cold and heat resistant infusion	√	√	√	√	√
Finished Magnets	Pull test	to test the mechanics performance	√	√	√	√	√
Finished Magnets	Gaussmeter	to measure strength and polarity of magnetic fields	√	√	√	√	√
Finished Magnets	Fluxmeter	to measure the density of the magnetic field beam, with the unit of Wb	√	√	√	√	√
Finished Magnets	Visual inspection machine	full inspection of magnet appearance, size, aperture, internal crack, or other defects.	√	√	√
Finished Magnets	Human inspection	full inspection of magnet appearance, size, aperture, internal crack, or other defects.				√	√
Finished Magnets	Visual inspection machine	Visual Inspection Machine: full inspection of magnet appearance, size, aperture, internal crack, or other defects.	√	√	√
Finished Magnets	Micrometer/Gauge/Projector	Visual Inspection Machine: full inspection of magnet appearance, size, aperture, internal crack, or other defects.				√	√
Finished Magnets	Conditional tester	to test temperature variation and humidity of magnets in a certain environment.	√	√	√	√	√