N42 Neodymium Magnet - 2mm Dia X 4mm Thick - Pack Of 20
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B&Q - 2mm Dia X 4mm Thick N42 Neodymium Magnet0.16Kg Pull (Pack Of 20)
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Full details
This guide is for crafters, DIY enthusiasts, and professionals needing small, strong magnets for precise applications. The key benefit is their significant holding power in a compact size, ideal for intricate projects. A caveat is their small size, requiring careful handling to avoid pinching fingers. These N42-grade Neodymium magnets are coated for durability and offer exceptional strength for their dimensions, making them versatile for packaging, displays, furniture, and crafts. Each magnet supports 0.16kg vertically.
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FAQs
What does N42 mean?
N42 refers to the grade of the Neodymium magnet, indicating its magnetic strength. N grades range from N24 to N52, with higher numbers signifying stronger magnets. N42 is a high-performance grade suitable for many demanding applications.
How strong is '0.16kg' pull force?
A 0.16kg (or approximately 0.35 lbs) pull force means the magnet can hold a weight of up to 160 grams vertically in ideal conditions. This is sufficient for holding a few sheets of paper or lightweight craft components.
Can these magnets be used outdoors?
The triple nickel-copper-nickel coating provides good corrosion resistance, making them suitable for many outdoor applications. However, prolonged exposure to harsh elements may still cause degradation over time.
What should I avoid when handling these magnets?
Avoid letting them slam together, as this can cause them to chip or shatter. Also, keep them away from electronic devices, magnetic media, and individuals with pacemakers.
Are these magnets suitable for children's toys?
Due to their small size and strong magnetic force, these magnets are not recommended for unsupervised use by young children, as they pose a choking hazard and can cause injury if swallowed.
Can I glue these magnets to surfaces?
Yes, these magnets can be glued. Use a strong adhesive suitable for metal and your intended surface. Ensure the surface is clean and dry for best adhesion.
Troubleshooting
Magnet not holding as expected
Ensure the magnet is in direct, flush contact with a mild steel surface. Check that the surface is ferromagnetic. Verify the object being held is not too heavy and the total required force exceeds the magnet's 0.16kg vertical pull capacity.
Magnets are difficult to separate
Slide magnets apart rather than pulling directly. If they are stuck face-to-face, try to carefully slide one off the edge of the other.
Magnet appears weaker
Check for physical damage or chipping. Ensure the magnet has not been exposed to excessive heat, which can reduce magnetism.
Pros and Cons
Pros
- Extremely strong for their small size.
- Durable triple-layer coating protects against corrosion.
- Versatile for numerous applications including crafts, packaging, and displays.
- Consistent N42 grade ensures reliable magnetic strength.
- Compact dimensions allow for unobtrusive integration into designs.
Cons
- Small size increases the risk of pinching fingers if handled carelessly.
- Can be brittle and may chip or break if subjected to strong impact.
- Not suitable for heavy-duty load-bearing applications due to limited pull force per magnet.
- Requires careful alignment due to strong attraction, potentially causing them to snap together.
- Pull force is significantly reduced by distance or non-ferrous materials.
Setup, Compatibility & Care
Setup:
These magnets are ready to use out of the box. Simply position them where their magnetic attraction is needed.
Compatibility:
- These magnets are designed to adhere to any ferromagnetic material, such as iron, nickel, and cobalt. They will not attract aluminum, copper, plastic, or glass.
- The pull force is strongest when the magnet is in direct, flush contact with a flat, mild steel surface.
- Performance can be reduced by non-ferrous barriers (e.g., wood, plastic, paint) between the magnet and the steel surface.
Care:
- Avoid exposing magnets to high temperatures, as this can demagnetize them.
- Handle with care to prevent them from snapping together forcefully, which can cause chipping or breakage.
- Keep away from sensitive electronic devices (e.g., hard drives, pacemakers) as strong magnets can damage them.
- Clean gently with a dry or slightly damp cloth. Avoid abrasive cleaners or solvents.