15 x 10 x 2mm Neodymium BAR Magnet

Specifications

• Material: Neodymium-Iron-Boron (NdFeB)
• Dimensions: 15mm (Length) x 10mm (Width) x 2mm (Thickness)
• Magnetization Direction: Through the thickness (2mm)
• Plating/Coating: Ni-Cu-Ni (Nickel-Copper-Nickel) triple layer for corrosion resistance
• Max Operating Temperature: 80°C (176°F)
• Shape: Rectangular BAR

Applications

• Invisible Enclosure Latches: Embed these in 3D printed project boxes for a snap-fit lid without screws.
• Sensor Triggering: Excellent target for Hall Effect sensors, Reed switches, and limit switches in CNC/Automation setups.
• Magnetic Levitation (MagLev): Great base plates for DIY repulsion tracks and levitating displays.
• Tool Organization: Build custom magnetic tool holders for your electronics workbench.

Unlock New Capabilities

• Past Projects: If you've previously used weak ceramic/ferrite magnets, you likely struggled with low holding force and bulky sizes.
• The Upgrade: This 15x10x2mm magnet unlocks low-profile, high-strength mechanics. You can now build hidden mounting systems, robust door sensors, and heavy-duty snap-fits that feel premium.
• Effort Level: Beginner.
• Hardware Required: Strong epoxy or cyanoacrylate (superglue) for mounting.
  Handling Guide

⚠️ WARNING: Brittle Material! Neodymium is incredibly strong magnetically but physically brittle like ceramic.

• Do not let them snap together: If two of these magnets slam together from a distance, the impact force will chip or shatter the nickel plating and the magnet itself.
• How to separate: Do not pull them straight apart. Always slide them laterally off one another.
• Machining: Do not attempt to drill or cut this magnet. The dust is highly flammable and you will destroy the magnetic field.
• Heat Warning: Do not exceed 80°C (e.g., hot car dashboards or near hot ends), or the magnet will permanently lose its strength.

Included in the Box:

• 1× 15x10x2mm Neodymium BAR Magnet

Frequently Asked Questions (FAQ)

• What is the magnetic grade of this 15x10x2mm block magnet?
  This is an Neodymium (NdFeB) rare earth magnet, offering an excellent balance of strength and cost.
• What is the maximum operating temperature for this neodymium magnet?
  The maximum safe operating temperature is 80°C (176°F). Exceeding this will cause irreversible loss of magnetic strength.
• Can I trigger a Hall Effect sensor with this magnet?
  Yes, the large surface area and high field strength make it an exceptionally reliable trigger for Hall Effect and Reed sensors, even through thin plastic enclosures.
• Can I cut or drill into this neodymium magnet?
  No. Neodymium magnets are brittle and will shatter. Additionally, the dust created by drilling is highly flammable and toxic.
• How do I securely attach this 2mm thick magnet to a 3D printed part?
  Use a strong two-part epoxy or cyanoacrylate (superglue). Hot glue is generally not recommended as it may not adhere well to the slick nickel plating.
• Is the 15x10x2mm magnet axially or diametrically magnetized?
  It is magnetized through the thickness, meaning the North and South poles are on the large 15x10mm flat faces.
• Will this magnet rust if exposed to water?
  While it has a protective Ni-Cu-Ni plating, prolonged exposure to moisture or outdoor environments will eventually degrade the plating and cause the internal iron to rust.
• How much weight can a 15x10x2mm magnet hold?
  Pull strength varies heavily based on the thickness of the metal it is attaching to and the sheer angle, but in optimal conditions against thick steel, it can hold approximately 1 to 3 kilograms.
• Can I use this magnet in an underwater ROV project?
  Only if you fully encapsulate or pot the magnet in marine-grade epoxy or silicone to completely prevent water ingress.
• What happens if I let two of these neodymium magnets slam together?
  Due to their brittle nature and strong pull, they will likely chip, crack, or shatter completely upon impact.
• Is this magnet strong enough for a magnetic levitation (maglev) project?
  Yes, the wide 15x10mm footprint provides excellent repulsive stability for DIY maglev tracks or floating platforms.
• How does the 2mm thickness affect the magnetic field compared to thicker blocks?
  A 2mm thick magnet provides a wide magnetic field but has a shallower penetration depth compared to a 5mm or 10mm thick block. It is best for close-contact holding.