12mm x 3mm (15/32" x 1/8") Diametric Neodymium Disc Magnet – N52 Grade

Key Features:

• Dimensions: 12mm diameter × 3mm thickness (Approx. 15/32" × 1/8")
• Pull Force: Approx. 8.27 lbs
• Magnet Grade: N52
• Magnetization: Diametrically Magnetized (Poles on the curved edges/sides)
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating for durability
• Shape: Specialty Disc

Material Description:

Our 12x3mm diametric magnets are a critical component for high-precision engineering. Because the magnetic field runs across the diameter rather than through the thickness, these magnets are perfect for use with Hall-effect sensors to detect rotational position. The N52 grade ensures a strong signal and a secure hold even in compact assemblies.

Technical Note: Diametric magnets behave differently than standard discs. They will not stack flat face-to-face in a traditional way; instead, they prefer to align side-by-side or "roll" to find their opposite poles. This makes them ideal for custom motors and rotary encoders.

Warnings and Safety Information:

• Choking Hazard: Keep away from children and pets. This size is large enough to be a significant hazard if swallowed.
• Pinch Hazard: The N52 pull force at 12mm is strong enough to cause a painful pinch. Handle with care.
• Medical Safety: Maintain a safe distance from pacemakers and sensitive medical implants.
• Handling: Neodymium is brittle. Do not let these magnets slam together, as they can shatter.

Applications:

• Rotary encoders and non-contact angular position sensors
• Micro-motor rotors and wind turbine prototypes
• Specialized magnetic couplings and "rolling" magnetic closures
• Scientific demonstrations of magnetic field lines
• Kinetic art installations and high-end desk toys