This is the ultimate guide tailored for novice magnet buyers and engineers. We explain in depth all the key parameters required for customizing a magnet, including material type, dimensional tolerance, magnetization direction, performance grade, surface coating, working environment, quantity packaging, and special requirements.
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Through specific examples and comparisons, you will clearly understand how to communicate effectively with suppliers to ensure that your customization requirements are accurately understood and produced, thereby saving costs and time. At the end of the article, there is a guide on how to obtain professional support.
What parameters need to be provided for custom magnets? An ultimate guide to simplifying procurement!
Have you ever been troubled by customizing a small magnet? Your inquiry sent to suppliers sinks without a trace, or the quotes you receive vary greatly, and the delivery date is nowhere in sight? In many cases, the problem does not lie with the suppliers, but with the asymmetry of parameter communication .
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Just as a tailor needs your measurements to make clothes, magnet manufacturers cannot “customize” for you without accurate parameters. Providing clear and complete parameters is the only shortcut for you to obtainquick and accurate quotesandefficient and reliable delivery.
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Today, I’ll help you thoroughly clarify exactly what parameters are needed for custom magnets, making your next purchase worry-free, labor-saving, and cost-effective!
Efficient Communication with Engineers: 8 Core Parameters That Must Be Provided
To ensure that the manufacturer fully understands your requirements, please be sure to prepare the following information. The more detailed the information, the fewer subsequent troubles!
- Material Type: A crucial factor determining magnetic force This is the first step in selection, as different materials have different characteristics:
- Neodymium Iron Boron (NdFeB): “King of Magnets” , with the strongest magnetic force, but it is prone to rust and sensitive to high temperatures, and has a relatively high cost. It is suitable for scenarios with extremely high magnetic force requirements.
- Ferrite (Ferrite) : “economically applicable” , weak magnetic force, but cheap, high temperature resistance, corrosion resistance. Widely used in the fields of horns, motors and so on.
- AlNiCo: “Essential for high temperatures”, with excellent high-temperature resistance, but weak magnetic force and easy to demagnetize. Commonly used in sensors and instruments.
- Rubber Magnet : ” A must-have for every household “, flexible, cuttable, with weak magnetic force. Commonly used for advertising stickers and refrigerator magnets.
Dimensions & Shape: The “Figure” of the Magnet
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This is the most intuitive parameter and must be precise:
- Dimensions : Provide all key dimensions, such as diameter (D), thickness (H/T), length (L), width (W), etc. Tolerances must be specified (e.g., ±0.1mm), as precise tolerances will affect costs.
- Shape : Is it a common round disc, square, ring, or a special shape? Special-shaped magnets usually require mold opening, which involves mold costs.
Magnetization Direction: The “orientation” of the magnetic poles
- This is the most easily overlooked yet crucial parameter! It determines the direction of the magnetic field.
- Axial magnetization : The magnetic poles are in the thickness direction of the magnet (for a circular disc, the upper and lower surfaces are the N/S poles).
- Radial magnetization: The magnetic poles are in the diameter direction of the magnet (for a ring, the outer and inner circles are the N/S poles).
- Multi-pole magnetization: Multiple N/S poles are alternately arranged on one surface, commonly used in motors.
Performance Grade (Grade) or Suction Requirement: The “Strength” of the Magnet
- Grade: For NdFeB, commonly used grades include N35, N38, N42, N52, etc. The larger the number, the higher the magnetic energy product and the stronger the magnetic force (but usually the brittleness also increases).
- Suction Force: If you have specific suction force requirements (such as needing to lift a 5kg iron block), please clearly inform us, and the engineer can back-calculate the appropriate materials and dimensions for you.
Surface Coating (Coating): The “protective clothing” of magnets
- It is mainly used to protect neodymium magnets from corrosion. Choose according to the usage environment:
- Nickel plating (Ni): The most common, silver-white, with a bright appearance and good protective properties.
- Galvanized (Zn): Silver-blue, with slightly less protective properties than nickel but lower cost.
- Epoxy Resin (Epoxy): Black, with a relatively thick coating, excellent protective properties, but the surface is not as smooth as electroplating.
- Phosphating : Basic anti-rust, mainly used in scenarios where appearance is not emphasized for internal parts.
Operating Environment: The “Battlefield” of Magnets
- The environment can significantly affect the selection and lifespan of magnets:
- Temperature : What is the maximum operating temperature? Neodymium magnets are sensitive to high temperatures and will demagnetize under high temperatures. Is it 80°C, 100°C, or 150°C? It must be clearly stated!
- Environment : Have you been exposed to water, acids, alkalis, chemicals, or oil mist? This determines the strength of the anti-corrosion coating required.
- Special Requirements: Is it required for food or medical grade (e.g., FDA certification)? Or are there other special certification requirements (e.g., RoHS, REACH)?
Quantity & Packaging: The “Scale” of Production
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- Quantity: Is it for proofing (from a few to dozens) or mass production (tens of thousands)? Quantity directly affects the unit price and production scheduling method.
- Packaging : Are there any special packaging requirements? Such as shockproof, anti-magnetic, how many pieces per tray/bag, whether fumigated wooden crates are required for export, etc.
Special Requirements: Your “Personalized Customization”
- Do you need the correspondingmagnetic circuit designorassembly services(such as installing steel cups, pasting adhesive strips)?
- Are there any special inspection reports requirements?
- Is it necessary to provide samples for testing?
A perfect inquiry example that will make you understand instantly!
Let’s take a look at the homework of a “good student”:
“Hello, we would like to customize a neodymium iron boron (NdFeB) magnet.
- Shape Dimensions : Circular disc, diameter 20mm (±0.05mm), thickness 5mm (±0.1mm) .
- Performance Grade: Grade N42.
- Magnetization Direction: Axial Magnetization (Thickness Direction).
- Surface Treatment: Nickel Plating (Ni-Cu-Ni).
- Operating Temperature: Long-term operation in an environment below 80°C.
- Quantity: First batch order 10,000 pcs.
- Packaging : 100 pcs per small bag, 10 small bags per inner box. Please attach the drawing for reference, and quote the price and provide the delivery date accordingly.
When suppliers’ engineers see such an inquiry, they will be very happy , because all key information is clear at a glance, and they can directly conduct accurate calculations and quotations without wasting several days on back-and-forth communication. Conversely, if the inquiry is simply “How much is a round magnet?”, the response will only be “Hello, please provide detailed parameters”, and then it will fall into an inefficient cycle.
If you’re still confused about parameters, or have a vague idea but don’t know how to implement it, don’t worry! This is exactly where our value lies.
Please contact our professional engineering team immediately. You only need to tell us your application requirements and usage scenarios, and we will provide you with a full set of solutions from material selection, magnetic circuit design to production and manufacturing, helping you turn your ideas into reality!
Next Step:[Get Free Magnet Selection Consultation and Quotation]
Hope this detailed guide can truly help you!
We are a manufacturer specializing in the research and development of magnets with years of industry experience. Our product offerings include NdFeB magnets, ferrite magnets, and custom magnetic components. Our goal is to provide high-quality magnetic solutions to customers worldwide, and we also offer OEM/ODM customization services.If you have specific procurement requirements, welcome to contact professional magnet manufacturers for quotes and technical support.
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