How about the quality of the magnets?

To ensure the quality of the products, every production procedure is inspected strictly by the professional QC team from all aspects. Besides, the Trade Assurance order will protect your payment, and make sure that we deliver on time and manufacture quality products as required.

Will the magnetism be weaker after years of use?

Yes, magnets do weaken over time. If you store permanent magnets correctly, neodymium magnets will likely lose less than 1% of their flux density over 100 years. The magnetism decline is neglected, that's why we call it a Permanent Magnet.

Damp Heat Resistance Custom Sintered NdFeB Permanent Magnet Forinstrument

Name: Damp Heat Resistance Custom Sintered NdFeB Permanent Magnet Forinstrument
Brand: Ningbo Ketai Magnetic Material Co., Ltd.
SKU: 2150051592

Zhejiang, ChinaNingbo Ketai Magnetic Material Co., Ltd.

US$0.20-1.00

100 Pieces

Sample price:US$0.20/piece.Request sample

Product profile

Customization

Available

Application

Electronic Products, Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet

Shape

Irregular

Model NO.

NdFeB Magnet

Coating

Customized

Grade

N30-33ah

Product Name

NdFeB Magnet

Keywords

Neodymium Magnet

OEM & ODM Custom

Logo Custom

Material Composition

Neodymium-Iron-Boron (NdFeB)

Magnet Type

Sintered NdFeB Permanent Magnet

Surface Coating

Nickel (Ni-Cu-Ni), Zinc, Silver, Gold, Epoxy Resin

Max Operating Temperature

80°C to 230°C (Depending on Grade)

Transport Package

International Standards

Specification

Standard Specifications or Customized

Trademark

KETAI

Origin

Zhejiang, China

Production Capacity

500000pieces/Year

Key features

Strongest Magnetic Performance: Highest energy product among permanent magnets with exceptional remanence and coercivity.

Custom Shapes & Sizes: Precisely formed into discs, blocks, rings, arcs, and custom geometries via advanced sintering.

Comprehensive Coating Options: Nickel, zinc, gold, epoxy, and passivation coatings for superior corrosion and humidity resistance.

OEM & ODM Acceptance: Full customization services including logo, design, and sample-based manufacturing support.

100% Quality Inspection: Strict visual and functional checks by professional QC team for consistent reliability.

Versatile Industrial Applications: Ideal for automotive motors, electronics, audio devices, and industrial automation systems.

Competitive Cost-Performance: High energy density allows device miniaturization, reducing weight and material costs.

Company profile

Ningbo Ketai Magnetic Material Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 14 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤24h

AI-Powered supplier vetting

SummaryNingbo Ketai Magnetic Material Co., Ltd. is identified as a combined company offering magnets and related magnetic, plastic, rubber, hardware, and electronic-component activities. It provides multiple customization modes and ODM services, and reports quality assurance with raw-material traceability. However, it reported no new products during the past year, no available SDK, and no OEM service for popular brands. Manufacturing capacity is supported by inventory capability and one-month average lead times, but there is no valid manufacturing contract with affiliated subcontractors. Overseas support is limited: no overseas warehouse, showroom, agents, branches, or offline trade-show participation were reported. Service governance also has weaknesses, including no written supplier-assessment, corrective-action, or complaint-handling procedures and no approved supplier list. ISO9001:2015 certification is reported, while an audit by CTI is documented with a report period from March 31, 2026 to March 30, 2027;...

Supplier typeThe supplier is classified as a combined company, with magnets as its primary product. Its stated business scope also includes magnetic materials, plastic and rubber products, hardware, electronic components, and related import/export agency activities, indicating a manufacturing and trading-oriented supplier profile.

CertificationsThe supplier reports quality assurance and raw-material traceability, and holds an ISO9001:2015 certificate according to the sustainable-development information. A CTI audit report is also documented, although the stated audit evaluation result is 0 and no explanation of that result is provided.

After-Sales capabilityThe supplier reports no written procedures or records for handling customer complaints, and it has no overseas warehouse, showroom, agent, or branch. These facts indicate limited documented after-sales and overseas service infrastructure.

R&D capabilityThe supplier offers ODM services and can customize from samples, designs, or through full or minor customization. However, it reported no new products during the past year and no available SDK, so evidence of ongoing product innovation is limited.

Production capacityThe stated scope includes manufacturing of magnetic materials, plastic products, rubber products, and hardware, while inventory capability is available and average peak- and off-season lead times are each one month. Nevertheless, there is no valid contract between the factory and affiliated subcontractors, creating a documented manufacturing-governance deficiency.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, and minor customization, and also provides ODM services. These stated service options directly demonstrate broad customization capability.

Product Q&A

Q:How fast can I get a reply?

You will receive our reply within 15 minutes during our work time, 08:00-18:00(UTC-8).

Q:What information do I need to supply when I have an inquiry?

To get a precise quotation on time, pls inform us of the following details when you send an inquiry to us: Dimensions or drawing; Grade of Material, Magnetized direction; Surface coating(if necessary); Quantity and delivery terms. If you don't have the above information, you can inform us of the application of the magnets, and our technician will provide it. professional advice for you.

Q:Can you offer customized sizes and shapes?

Yes, we could produce customized-sized, shaped magnets according to customers' requirements.

Q:Can I have a free sample before mass production?

Yes. We could offer free samples if the magnets are in stock, but you need to pay the delivery cost. It may take a minimum of 7 days for production if your size is out of stock. For neodymium magnets, we have many different-sized samples in stock.

Q:Can magnets be shipped by air or by express?

We could ship the magnets by air or by express with our magnetic shield package.