FAQs

About Nexal & Our Capabilities

What are Nexal's core competencies, and how do we differ from other NdFeB magnet suppliers?
Nexal’s core competency lies in its vertically integrated manufacturing model. We own and operate a network of family-owned NdFeB magnet production facilities in Ningbo, ensuring a stable supply of self-produced material and exceptional quality control from the source. Informed by our deep material science knowledge base, we not only possess strong in-house manufacturing capabilities but also strategically integrate with long-term industry partners certified under ISO9001 and IATF 16949. This allows us to provide flexible machining capabilities and comprehensive, one-stop solutions for a wide range of magnetic products, delivering stable, high-quality, and cost-effective magnetic solutions.
We specialize in serving clients across diverse sectors including electric vehicles, industrial automation, robotics, consumer electronics, medical devices, and wind power. Our NdFeB magnets are widely used in various motors (e.g., BLDC, stepper, PMSM), sensors, actuators, and magnetic couplings. We have numerous successful case studies and can provide optimized magnet solutions for these specific application scenarios.
Nexal strictly ensures its owned production facilities and core partners are certified to ISO9001:2015 and IATF 16949:2016, covering end-to-end production processes. Our products fully comply with RoHS and REACH. Through a strict internal management system, every stage from raw material procurement to final delivery is controlled to ensure consistently stable, superior quality.
Yes, we have a wide range of successful case studies and application experiences. For example:
  • Brushless Motor Industry: We supplied N42 magnets to a renowned motor manufacturer, successfully boosting their product’s power density by 8% and effectively reducing heat generation through optimized composition.
  • Loudspeaker Drivers: We provided N35 epoxy-coated magnets to an audio manufacturer, enabling their products to pass stringent coastal environment tests and ensure stable sound quality.
  • Application Tips: For every application scenario, specific operating conditions and expected performance indicators (e.g., power, operating temperature, lifespan) need to be provided to allow our engineering team to optimize magnet grade and geometry. We will provide best practice references from our internal case study database.

Magnet Technology & Selection

How do I select the appropriate NdFeB magnet grade for my application?
Selecting the right grade requires a comprehensive assessment of your motor’s or device’s maximum operating temperature, ambient reverse magnetic field strength, required magnetic flux density, size constraints, and budget. We offer a range of grades from N35 to N52, as well as high-temperature and high-coercivity grades like H, SH, UH, and EH. Our engineering team will provide expert advice and magnetic circuit design support tailored to your specific application based on detailed performance data and application best practices.
These are key metrics for NdFeB magnet performance：
  • Remanence (Br) represents the magnetic flux density retained by the magnet after an external magnetizing field is removed, influencing a motor’s flux output and torque.
  • Intrinsic Coercivity (Hcj) indicates the magnet’s resistance to external demagnetizing fields or high temperatures, a crucial factor for anti-demagnetization performance.
  • Maximum Energy Product ((BH)max) is the product of Br and Hcj, representing the maximum magnetic energy stored per unit volume, reflecting the magnet’s overall strength.

Common surface treatments include Nickel (Ni), Zinc (Zn), Epoxy, and phosphating. Different coatings have distinct performance characteristics, suitable environments, and processing requirements. Coating selection depends on the application environment (e.g., humidity, acidity/alkalinity), corrosion resistance needs, appearance, and bonding requirements. Our experts can advise based on your specific situation to ensure stable magnet performance throughout its intended service life.

Sintered NdFeB magnets are renowned for their superior magnetic properties (higher Br, (BH)max), making them ideal for applications demanding exceptional magnetic force, efficiency, and compactness. However, their inherent brittleness necessitates precise post-processing. Bonded NdFeB, on the other hand, is produced by mixing magnet powder with a binder and pressing it into shape, allowing for complex geometries and high dimensional accuracy, but offering comparatively lower magnetic performance and temperature resistance.
Nexal specializes in high-performance sintered NdFeB magnets. We understand that many cutting-edge motors and precision devices require the highest possible energy product and long-term stability. When selecting a grade, consider magnetic performance, temperature resistance, dimensional accuracy, and budget; our engineering team will recommend the most suitable sintered grade and provide technical support based on these requirements.
While NdFeB magnets are powerful, they are relatively brittle and hard. To prevent damage and ensure safety during machining and assembly, we recommend adhering to the following principles:
  • Machining Recommendations: Use non-magnetic fixtures (e.g., aluminum, brass, stainless steel) to minimize magnet attraction issues. During machining, step-by-step cutting should be employed to avoid generating excessive localized heat that could lead to demagnetization. For hole drilling, it’s advisable to drill a smaller pilot hole first before enlarging to reduce the risk of cracking.
  • Assembly Precautions: Avoid impact during assembly, and it is recommended to use cushioning pads or specialized fixtures for gradual clamping. When fitting magnets with metal components, use magnetic holding tools or clamps to prevent sudden attraction that could cause injury during manual handling.
  • Safety Operations: When handling strong magnets, wear protective gloves and safety glasses, and ensure they are kept away from electronic devices or magnetic storage media (strong magnetic fields can cause data loss).

Ordering, Samples & Testing

How do I request samples for evaluation? What are the sample categories, costs, and the application process?
  • Standard Stock Samples: A limited quantity of free samples may be provided for evaluation based on initial discussions and your order intent.
  • Custom/Machined Samples: Sample fees are charged based on the required processes, materials, and machining complexity.
  • Tooling/Special Process Samples: If new tooling or special processes (e.g., bonding magnets, specific test fixtures) are required, sample fees will be quoted separately based on labor and material costs.
Application Process: You can submit a sample request via our online application form or by directly contacting our sales team. Please provide detailed magnet specifications (grade, dimensions, surface treatment), quantity, application scenario, shipping information, and any special testing requirements. Our sales/technical team will review feasibility according to our internal guidelines, and will proactively contact you for drawings or technical clarifications if needed. Upon confirmation of fees (if applicable), sample production and dispatch will be arranged promptly.
  • Lead Time: Stock samples typically ship within 1–3 business days; custom samples generally take 3–10 business days, with more complex processes potentially extending this period. Adhering to our efficient internal logistics procedures, domestic delivery usually takes 1–3 days, and international express delivery typically takes 3–7 days (depending on the destination).
  • Delivery & Safety: After shipment, we will record the tracking number in our system for your monitoring. Upon receiving the samples, you may perform an initial inspection within 7 days (if required). As strong magnetic materials, NdFeB magnets are handled strictly according to our internal magnet safe packaging guidelines. All samples are specially secured to prevent breakage or coating damage during transit, and are reinforced and declared as magnetic cargo according to carrier requirements (e.g., IATA air transport regulations). For export, we also provide commercial invoices, Certificates of Origin (if requested), and customs declaration details.
Should subsequent bulk orders meet our agreed-upon Minimum Order Quantity (MOQ), sample fees can be deducted from the first bulk order (subject to written confirmation). Samples are generally non-returnable for non-quality issues; special cases will be evaluated by our sales team.
Batch order lead times depend on magnet grade, processing complexity, and order volume. Our production management system and the detailed process flows defined in our internal documentation ensure efficiency from scheduling to shipment. Typically, after receiving an order and confirming drawings/technical requirements, standard products take about 3-4 weeks, while custom products may take 4-6 weeks. We are committed to providing fast responses and stable lead times, which will be clearly stated in the quotation.
We provide comprehensive magnetic performance test reports, including Br, Hcj, (BH)max values, magnetic flux, surface Gauss, dimensional tolerance, coating thickness, as well as temperature-demagnetization curves, high-temperature aging, and reverse field impact test reports. All reports are traceable to their respective batches and issued in strict accordance with the quality standards and inspection procedures defined within our internal documentation, ensuring product quality transparency.
  • Quotation Details: Our quotations typically include material cost, processing, surface treatment, and basic packaging, excluding taxes and shipping (unless otherwise specified). Quotes are generally valid for 30 days, with the specific validity period noted on the quotation. We offer tiered discounts based on annual purchase volume or single order volume, as reflected in our price lists.
  • Payment Methods & Terms: We support T/T (telegraphic transfer) and may accept Letters of Credit (L/C) depending on order size. For small amounts, PayPal is available, and platform transactions support Trade Assurance. Common payment terms are 30% deposit with the balance due before shipment; samples or small orders may require full payment upfront. For large clients, payment terms can be arranged subject to approval and credit assessment.

Logistics, Compliance & After-Sales

Are there special requirements for shipping NdFeB magnets? How does Nexal ensure safe transit?
Strong magnetic materials are classified as dangerous goods for air transport and require specialized magnetic shielding packaging to comply with IATA regulations. We strictly adhere to detailed magnet transportation and packaging specifications .
Packaging Standards: Inner packaging uses anti-static/moisture-proof materials combined with foam or isolators to prevent magnet collisions during transit. Outer packaging utilizes cardboard boxes or wooden crates (depending on weight), marked with model, quantity, and “magnetic material” notices. For heavy or large volume shipments, we use pallet packaging with strapping.
  • Transportation Methods: We support express delivery (DHL/UPS/FedEx), air freight, and sea freight (FCL/LCL), and can quote EXW/FOB/CIF/DDP Incoterms as per customer request.
  • Safety Compliance: All shipments include necessary declarations for magnetic items. We possess professional packaging expertise to ensure magnets do not affect navigation equipment, or suffer demagnetization or damage during transit.
Yes, all our products comply with RoHS and REACH directives, and strictly follow our internal regulatory compliance guidelines. We provide corresponding declarations of conformity or test reports (depending on the model) for materials and coatings. We also provide Certificates of Origin (COO).
  • Export Controls: It is important to note that certain countries/regions may have additional restrictions or declaration requirements for strong magnetic materials.
  • Our compliance team regularly updates and references regulatory checklists to ensure all products meet the latest international environmental directives, and assists in confirming destination regulations before shipment.
We guarantee the quality of all our products. Should you encounter any quality issues, please submit an RMA/problem ticket via support@company.com or through our order system. Our after-sales service team will follow our internally defined handling procedures:
  • Problem Reporting: Please provide relevant photos, problem descriptions, and batch information.
  • Rapid Response: We will provide an initial solution within 24-48 hours.
  • Investigation & Resolution: If necessary, we will arrange for sample return for inspection. Based on our internal analysis of common failures (such as magnetism decline, coating peeling, size exceeding tolerance) and their root causes, we will perform a root cause analysis. Depending on fault determination, we will provide solutions such as repair, replacement, or refund. We are dedicated to resolving client issues quickly and effectively.
Magnets should be stored in a dry, clean, well-ventilated environment at moderate temperatures (recommended 20-25℃), away from strong magnetic fields, corrosive media, and high humidity. Ensure magnets are well-packaged to prevent mechanical damage or oxidation. Following our recommended magnet storage and handling guidelines for safe keeping, particularly concerning avoiding mutual attraction and collision between different magnets.

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