Neodymium Disc Strong Magnet – 2.6X3.5mm

Neodymium Disc Strong Magnet – 2.6X3.5mm provides an incredible amount of magnetic force within an extremely compact circular profile, making it a premier choice for precision engineering and miniature assemblies. These NdFeB (Neodymium-Iron-Boron) magnets represent the strongest class of permanent magnets currently available on the commercial market. Consequently, you can achieve significant holding power in space-constrained applications where traditional ferrite magnets would fail. Furthermore, the nickel-copper-nickel triple-layer coating ensures a smooth finish and offers essential protection against oxidation. Therefore, these micro disc magnets serve as an ideal solution for hobbyists, engineers, and manufacturers requiring reliable magnetic performance for sensors, jewelry clasps, or miniature mechanical actuators.

Key Features:

• High Magnetic Flux: Utilizing rare-earth N35 or higher grade material, these magnets deliver exceptional pull strength relative to their tiny volume.
• Triple-Layer Coating: The Ni-Cu-Ni plating provides a high-quality, corrosion-resistant barrier and a professional metallic appearance.
• Precision Sizing: Tight manufacturing tolerances ensure consistent performance across batches, which is vital for automated assembly lines.
• High Coercivity: These magnets exhibit excellent resistance to demagnetization, maintaining their magnetic integrity over long periods of use.
• Versatile Mounting: The flat disc shape allows for easy integration into recessed holes or adhesive-backed mounting configurations.

Technical Specifications:

• Magnet Type: Permanent Neodymium (NdFeB)
• Grade: N35 / N42 (Typical)
• Remanence (Br): ≈ 11.7 – 13.2 kG
• Max Energy Product (BHmax): ≈ 33 – 42 MGOe
• Maximum Operating Temperature: 80°C (176°F)
• Magnetic Orientation: Axially magnetized (Poles are on the flat circular faces)

Mechanical Specifications:

• Shape: Cylindrical / Disc
• Plating: Nickel-Copper-Nickel (Ni-Cu-Ni)
• Density: ≈ 7.5 g/cm³
• Hardness: ≈ 600 Hv (Note: Neodymium is inherently brittle)

Dimensions:

• Diameter: 2.6 mm (±0.05 mm)
• Thickness: 3.5 mm (±0.05 mm)
• Volume: ≈ 18.58 mm³

Magnetic Pole Details:

• North Pole: One flat circular face acts as the North seeking pole.
• South Pole: The opposite flat circular face acts as the South seeking pole.
• Mounting Note: However, users must exercise caution during assembly; because these magnets are brittle, allowing them to snap together violently can cause them to chip or shatter.
• Adhesive Compatibility: For permanent fixing, use high-strength cyanoacrylate or epoxy resins on the nickel-plated surface.

Datasheet Reference:

• Download Neodymium Magnet Material Properties Datasheet

Commonly Used in:

• Hall Effect Sensors: Providing the magnetic field required for non-contact position and speed sensing in electronic modules.
• Precision Scale Models: Serving as invisible fasteners for detachable parts in dioramas and tabletop gaming miniatures.
• Electronic Enclosures: Functioning as low-profile magnetic latches for small device lids and battery covers.

Applications:

• Reed Switch Activation: Operating small reed switches in security systems or industrial limit detection.
• Miniature Robotics: Attaching interchangeable tools or sensors to small-scale robotic arms and mobile platforms.
• Jewelry and Fashion: Creating strong, hidden clasps for necklaces, bracelets, and specialized clothing fasteners.
• DIY Crafting: Developing unique magnetic closures for handmade cards, boxes, and artistic displays.

Equivalent Models:

• Rare Earth Disc Magnet 3x3mm: A slightly larger alternative often used when clearance allows for a broader footprint.
• N52 High Strength Series: Offers a higher magnetic pull within the same dimensions for applications requiring maximum force.
• Samarium Cobalt (SmCo) Discs: These act as functional equivalents in high-temperature environments, however, they generally provide lower magnetic force at room temperature.

Package Includes:

• 1 x Neodymium Disc Strong Magnet – 2.6X3.5mm