Name: China High Adhesive Force Round Countersunk Magnets Manufacturers Factory - Low Price - Jinconn
Brand: Jinconn
SKU: 293886809

Description

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Product Overview & Application Fields

These high-strength round countersunk magnets, manufactured from sintered rare earth NdFeB, deliver exceptional holding force and reliable magnetic performance in a compact, easy-to-install design. The precision-machined countersunk hole allows secure, flush mounting with standard fasteners, ensuring both mechanical stability and clean integration.

Thanks to the inherently high energy density of NdFeB magnets, these products provide strong and consistent adhesive force, even in space-constrained applications. Their robust construction and controlled dimensional accuracy make them suitable for repeated use in demanding environments.

Typical applications include:

Industrial applications
Securing safety covers and protective guards
Fixing metal plates and panels
Stabilizing components during operation or maintenance

APPLICATION EXAMPLES product-850-538

Techinical Specification

Product Name	High adhesive force round countersunk magnets
Magnetic Grade	N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe)
Thickness	D 20mm x 5mm
Countersunk Hole	3mm
Dimensional Tolerance	Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm
Magnetisation Direction	Axially Magnetised
Polarity	Countersunk Face North
Operating Temperature	≤80°C (high-temp version available)
Density	≥7.5 g/cm³
Surface Magnetic Field	3800 ±200 Gauss (measured with TM-801 Gauss meter)
Magnetic Flux	2.3 mWb (measured with fluxmeter)

Manufacturing Process

NdFeB Magnet Production Flow

Composition design and raw material preparation
Vacuum induction melting and strip casting
Hydrogen decrepitation and fine powder milling
Magnetic field alignment and pressing
High-temperature sintering and aging treatment
Precision grinding and dimensional control
Surface treatment (Ni, Zn, epoxy, etc.)
Magnetization, testing, and quality verification

Appearance & Dimensional Inspection

Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation

Image Measurement System: High-res cameras and algorithms conduct non-contact 2D measurements, especially for complex or irregular shapes, ensuring efficiency and objectivity in mass production.

Automated Intelligent Inspection: High-speed cameras with AI algorithms detect and reject defects (e.g., cracks, scratches, discoloration) and dimensional anomalies, improving yield and reducing human error.

Packaging & Transportation

Products are packaged only after final quality approval.

Magnets are cleaned and fully dried before packing.
Non-magnetic spacers are used to separate magnets and prevent collision.
Inner packaging provides cushioning and surface protection.
Outer cartons or wooden cases ensure safe transportation.
Labels include product type, quantity, batch number, and traceability.

With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

After-Sales Support for Rare Earth NdFeB Magnets

Strict quality control is applied throughout production, from raw materials to final inspection.

Any nonconformity attributable to manufacturing will be addressed through corrective action.

Root cause analysis and technical feedback can be provided upon request.

Coating performance and corrosion-related issues are evaluated based on actual application conditions.

Continuous improvement measures are implemented based on customer feedback.

Please contact us for free samples, magnet customization solutions, and MSDSRoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001 or other relevant certificates!