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B&Q£10.99Visit shop - N42 Neodymium Magnet For ArtsCraftsModel MakingDiyHobbiesOffice & Home25mm O.d. X 16mm I.d. X 5mm Thick9.4Kg Pull
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This guide is for engineers, designers, hobbyists, and manufacturers seeking powerful and durable magnetic solutions. The N42 Neodymium Magnet offers exceptional strength in a compact size, ideal for demanding applications. A key caveat is that while strong, these magnets can be brittle and require careful handling to prevent chipping or shattering.
| Brand | FIRST4MAGNETS |
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N42 indicates the grade of the neodymium magnet, referring to the magnetic energy product. Higher numbers generally signify stronger magnets. N42 is a high-performance grade offering a good balance of strength and cost.
Store magnets in a cool, dry place, separated by non-magnetic materials like plastic or cardboard. Keep them away from electronic devices and magnetic media. Stacking them directly can cause them to attract strongly and potentially chip.
While neodymium magnets themselves can rust, the triple coating of Nickel-Copper-Nickel (Ni-Cu-Ni) provides excellent protection against corrosion and wear. However, deep scratches or damage to the coating can expose the magnet material to moisture.
Eddy currents are loops of electrical current induced within conductors by a changing magnetic field. When the magnet slides over a copper pipe, it induces these currents, which create their own magnetic field that opposes the motion, causing the magnet to fall slowly.
Neodymium magnets are powerful and can cause serious injury if swallowed or if fingers get pinched. They should only be used by or under the strict supervision of adults.
The maximum operating temperature for N42 grade magnets is typically around 80°C (176°F). Exceeding this temperature can permanently reduce the magnet's strength.
Yes, strong adhesives like cyanoacrylate (super glue) or epoxy resins work well for bonding these magnets. Ensure surfaces are clean and free of dust or grease for optimal adhesion.
Ensure the magnet is in direct contact with a mild steel surface. Check for any non-ferrous materials (like paint or plastic) between the magnet and the steel. Verify the correct magnet grade and dimensions. The 9.4kg pull force is under ideal flush contact conditions.
This indicates the magnet was likely dropped or subjected to impact. Handle all neodymium magnets with extreme care. Avoid letting magnets slam together. If a magnet is broken, safely dispose of the fragments and consider replacing it.
Slide magnets apart rather than pulling directly to overcome the strong attraction. Use a thin, non-magnetic object as a lever if necessary. Store magnets with protective spacers to prevent this issue.
Setup: These magnets are designed for direct application. Ensure surfaces are clean and dry before placing them. For permanent installations, consider using strong adhesives like epoxy or cyanoacrylate, ensuring proper ventilation during application.
Compatibility: Compatible with ferrous materials (iron, steel, nickel, cobalt). Avoid prolonged contact with sensitive electronic devices, magnetic media, or credit cards, as the strong magnetic field can cause damage. These magnets are not suitable for children without strict adult supervision due to their strength and potential to pinch.
Care: Handle with care. Avoid dropping or impacting the magnets, as they can chip or break. Store them with spacers (like plastic or cardboard) between them to prevent them from snapping together. Clean with a dry or slightly damp cloth. Avoid exposure to extreme heat, which can demagnetize them. Do not attempt to machine or drill these magnets, as they are brittle and can shatter.
