Best current price£13.99from B&Q
Shopping.co.uk recommended and popular offers
B&Q£13.99Visit shop - N42 Neodymium Magnet For ArtsCraftsModel MakingDiyHobbiesOfficeAnd Home40mm X 10mm X 20mm Thick18.6Kg Pull
Visit shop1 offer from £13.99
View price history by clicking the chart icon.
This guide is for hobbyists, designers, engineers, and manufacturers seeking powerful, compact magnetic solutions. The key benefit is its exceptional strength and corrosion resistance in a small form factor. A potential caveat is the need for careful handling due to its strong magnetic pull. These N42 grade Neodymium magnets are axially magnetized, featuring a durable triple coating of nickel, copper, and nickel for enhanced protection and a smooth finish, making them suitable for a wide range of demanding applications.
| Brand | B&Q |
|---|
The 'N' stands for Neodymium, and '42' refers to the maximum energy product (BH)max, measured in mega-Gauss oersteds (MGOe). A higher number generally indicates a stronger magnet.
As an N42 grade magnet with dimensions of 40mm x 10mm x 20mm, it possesses a very strong pull force relative to its size. Specific pull force can vary based on material thickness and contact surface but is substantial for its dimensions.
Neodymium magnets are brittle and can shatter if machined improperly. It is generally not recommended to drill or machine them without specialized equipment and techniques.
While specific temperature limits vary, standard N42 grade Neodymium magnets typically have a maximum operating temperature around 80°C (176°F). Exceeding this can lead to irreversible loss of magnetic strength.
Store magnets separated by plastic or cardboard, or with a steel keeper to bridge the poles. Keep them away from electronics, magnetic media, and children. Store in a cool, dry place.
The triple nickel-copper-nickel coating provides excellent corrosion resistance, making them suitable for many environments, but they are not designed for continuous submersion in water without additional protective measures.
Ensure the magnet is in direct contact or very close proximity to a ferromagnetic material. Check that the material being attracted is sufficiently magnetic. Verify the magnet is not damaged or significantly demagnetized by heat or impact.
Inspect the magnet for signs of wear. While the coating offers protection, prolonged exposure to harsh chemicals or abrasive environments can cause damage. Clean gently with a soft cloth and store in a dry environment.
Slide one magnet off the other sideways rather than pulling directly apart. Use a non-magnetic tool if necessary to create leverage. It's easier to separate them when not fully flush against each other.
Setup: These magnets are typically used by embedding them into materials, using strong adhesives (like epoxy), or incorporating them into designed slots or housings. Ensure that the surfaces where the magnets will be attached are clean, dry, and free of debris for optimal adhesion.
Compatibility: The magnets are compatible with most non-ferrous materials. When used with ferromagnetic materials, ensure the application accounts for the strong pull force to avoid unintended attraction or damage. They are generally compatible with electronic devices, but care should be taken to maintain a safe distance to avoid interference with sensitive components.
Care: Handle with care to avoid pinching fingers or attracting unintended metal objects. Store magnets separately or with a keeper (a piece of steel that bridges the poles) to prevent demagnetization and accidental attraction. Keep away from heat sources, as high temperatures can weaken their magnetic strength. Clean the magnet surfaces with a dry or slightly damp cloth; avoid harsh chemicals that could damage the coating. Due to their brittleness, avoid dropping them or allowing them to impact forcefully against hard surfaces or other magnets.
