Can a magnet that has lost its magnetism be re-magnetized

Provided that the material has not been damaged by extreme heat. the magnet can be re-magnetized back to its original strength.

Can I make a magnet that I already have any stronger?

Once a magnet is fully magnetized, it cannot be made any stronger-it is"saturated." in that sense, magnets are like buckets of water; once they are full. they can't get any "fuller."

Can you supply magnets with one pole on the outside and one on the inside?

Ring magnets can be magnetized this way and they are referred to as radially magnetized.

Nickel Coated Rectangular Sintered NdFeB Neodymium Block Magnets

Name: Nickel Coated Rectangular Sintered NdFeB Neodymium Block Magnets
Brand: Great Magtech (Xiamen) Electric Co., Ltd.
SKU: 943808905

Fujian, ChinaGreat Magtech (Xiamen) Electric Co., Ltd.

US$2.50

100-999 Pieces

US$2.20

1,000+ Pieces

Sample price:US$30.00/piece.Request sample

Product profile

Customization

Available

Application

Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet, Generator NdFeB Magnet

Shape

Ring

Coating

Nickel

Grade

N40sh NdFeB Magnet

Product Name of NdFeB Magnet

Sintered Strong Permanent N40sh Ring NdFeB Magnet

Envrionment Management System

ISO9001/14001

Certificate of NdFeB Magnet

CE/RoHS/SGS

Tolerance of NdFeB Magnet

+/- 0.05mm

Model Number of NdFeB Magnet

Gme-Ring

Magnetization Direction of NdFeB Magnet

Axial/Radial/Multi-Poles Magnetization

Working Temp. of NdFeB Magnet

80-200 Degree Centigrade

Transportation of NdFeB Magnet

by Sea, by Air, by Express

Payment

T/T, Paypal, Western Union

Lead Time of NdFeB Magnet

7-25days

Transport Package

Carton, Wood Case, Anti-Magnetized Package

Specification

As Client's Request

Trademark

GME

Origin

Zhejiang/Xiamen

HS Code

8505111000

Production Capacity

3000 Tons

Key features

Wide Grade Range: Available in N35-N54 series including M, H, SH, UH, EH, AH for various temperature needs.

Custom Shapes & Sizes: Offering disc, cylinder, block, ring, sphere, arc, and custom shapes with various sizes.

Multiple Coating Options: Coatings include Nickel, Zinc, NiCuNi, gold, silver, copper, epoxy, and more for protection.

Flexible Magnetization: Supports axial, radial, multi-poles, and other customized magnetization directions.

High Temperature Stability: Working temperature up to 80-230 Celsius depending on the specific grade selected.

Strong Magnetic Performance: Neodymium-Iron-Boron magnets offer high unit magnetic properties and strong magnetism.

ISO & Safety Certifications: Certified with ISO9001, QS-9000, SGS, RoHS, and REACH standards.

Global Shipping Options: Shipping via courier (TNT, DHL, FedEx, UPS), air, or sea with transit tracking.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceCooperated with Fortune 500Multi-language Pioneer

Great Magtech (Xiamen) Electric Co., Ltd.

Fujian, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Flexible customization CertifiedExport Year: 9 Years CertifiedNearest Port: Ningbo Port, Xiamen Port, Shanghai PortAverage Response Time: ≤8.99h

AI-Powered supplier vetting

SummaryThe supplier demonstrates established manufacturing, customization, export, and service-process capabilities. It reports annual capacity of 4,000 tons of neodymium magnets, 5,000 tons of rubber magnets, and 1,000 tons of samarium cobalt magnets, with flexible customization, ODM, and OEM services. Quality and service management are supported by written procedures and records, an approved supplier list, corrective and preventive action procedures, and finished-product inspection instructions. Certifications listed include RoHS and CE. The supplier has no SDK, overseas warehouse, showroom, agent, branch, or stated overseas service coverage, but has participated in Concrete Asia. Financial information is limited to year references, so credibility cannot be fully assessed. Innovation is evidenced by new products in the past year and ERP use, although no SDK is available. Customer-related evidence includes OEM service for well-known brands, but no specific customer names or case details are provided.

Supplier typeThe supplier is presented as a magnet manufacturer with reported production of neodymium, rubber, and samarium cobalt magnets. Its ODM and OEM offerings indicate it also operates as a manufacturing service provider for customized and branded products.

CertificationsThe supplier reports holding RoHS and CE certifications, along with other unspecified certifications. These stated certifications provide explicit compliance evidence, although the scope and validity details are not supplied.

After-Sales capabilityService capability is supported by written procedures, followed records, corrective and preventive action procedures, and an updated approved-supplier list. However, the supplier reports no overseas warehouse, showroom, agent, or branch, and lists zero countries with overseas services, limiting evidence of localized after-sales support.

R&D capabilityThe supplier reports having introduced new products during the past year, provides flexible R&D design services, and offers ODM services. It also uses ERP for production, procurement, quality control, and logistics management, but explicitly has no available SDK and reports zero for its sustainable-development technical transformation and big-data capabilities.

Production capacityReported annual capacity is 4,000 tons of neodymium magnets, 5,000 tons of rubber magnets, and 1,000 tons of samarium cobalt magnets. Production-related controls include uniform finished-product inspection instructions, while service procedures and records are established; stated lead times are within 15 workdays off-season and one month during peak season.

Customization capabilityThe supplier explicitly provides flexible customization through design and R&D services. It also reports ODM capability and OEM service for popular brands, supporting both customized product development and branded manufacturing.

Client casesThe supplier states that it provides OEM services for well-known brands and has participated in the Concrete Asia offline trade show. No customer names, project descriptions, order examples, or verifiable case outcomes are provided, so the depth of its customer track record cannot be fully assessed.

Product Q&A

Q:How long is your lead time?

Generally it is 5-10 days if the goods or materials are in stock. or it is 20-25days for new production, it is according to the order quantity.

Q:What is your MOQ?

We have no strict MOQ, if we can do, we will try our best to cooperate; if any questions as small quantity, we will be open to communicate with our customers for a better solution.

Q:What are your terms of payment?

Payment<=10,000/sd,100% in advance, paymcnt>=10,000usd,30%t/t in advance, balance before shipment.

Q:Will magnets lose their power over time?

Modern magnet materials do lose a very small fraction of their magnetism over time. for samarium cobalt materials, for example, this has been shown to be less than 1% over a period of ten years.

Q:What might affect the strength of a magnet?

The factors can affect a magnet's strength: heat radiation strong electrical currents in close proximity to the magnets other magnets in close proximity to the magnet(Neodymium magnets will corrode in high humidity environments unless they have a protective coat-ing-) shock and vibration do not affect modern magnet materials unless sufficient to physically damage the material.