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

Key Features:

• Dimensions: 4mm diameter × 4mm thickness (Approx. 5/32" × 5/32")
• Magnet Grade: N52
• Pull Force: Approx. 1.47 lbs
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating for a durable, professional finish
• Magnetization: Axially magnetized (Poles on the flat 4mm circular ends)
• Shape: Cylinder / Deep Disc

Material Description:

Our 4x4mm N52 cylinders offer a robust magnetic solution for precision engineering. Because the thickness matches the diameter, these magnets create a very deep magnetic flux, making them ideal for triggering sensors through thicker barriers or for heavy-duty hobby joints. These are the strongest permanent magnets available for this specific footprint.

Handling Note: At 4mm thick, these are less prone to breaking than thin discs, but they are still brittle. They can jump together with significant force; handle with care to avoid chipping the plating or pinching skin.

Warnings and Safety Information:

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

Applications:

• Precision industrial sensors and Hall-effect triggers
• Advanced 3D printing (perfect for friction-fit 4mm holes)
• Heavy-duty miniature articulation and "flying" stands for models
• Custom magnetic tool organization and jigs
• Scientific research and classroom physics demonstrations