4mm x 8mm (5/32" x 5/16") Neodymium Cylinder Magnet – N52 Grade

Key Features:

• Dimensions: 4mm diameter × 8mm thickness (Approx. 5/32" × 5/16")
• Pull Force: Approx. 1.79 lb
• Magnet Grade: N52
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the 4mm flat circular ends)
• Shape: Cylinder / Rod

Material Description:

Our 4x8mm N52 cylinders are engineered for maximum magnetic reach. The elongated shape concentrates the magnetic flux at the poles, allowing for a stronger pull through gaps or thicker materials. These are significantly easier to handle and install into deep-drilled holes than multiple thin discs.

Note on Brittleness: Despite their thickness, Neodymium magnets are fragile ceramic-like structures. Avoid snapping them together sideways, as the length of the cylinder makes them susceptible to shearing if they impact with force.

Warnings and Safety Information:

• Choking Hazard: Small size is dangerous for children and pets. Keep strictly in a secure container.
• Pinch Hazard: The N52 pull force at this 8mm thickness is strong enough to cause a painful pinch. Handle with care.
• Medical Safety: Keep away from pacemakers and other sensitive medical implants.
• Electronics: Avoid direct contact with magnetic storage media and mechanical watches.

Applications:

• Industrial reed switches and Hall-effect sensors
• Advanced 3D printing (embedding into deep internal cavities)
• Heavy-duty miniature articulation and "flying" stands
• Custom magnetic tool organization and jigs
• Scientific experiments requiring a stable, deep magnetic field