30mm x 3mm (1 3/16" x 1/8") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 30mm Diameter × 3mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 17.7 lbs 
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the large flat circular faces)
• Surface Gauss: Approx. 2,850 Gauss

Material Description:

Our 30x3mm N52 discs are designed for professional engineering and structural applications that require an expansive magnetic footprint without adding significant bulk. The 30mm diameter provides superior resistance to shear forces and an incredible amount of surface area for adhesive bonding. At just 3mm thick, these magnets are ideal for "invisible" closures behind thick wood veneers or plastic panels, providing a massive 20+ lb "snap" for high-end furniture, modular retail displays, and heavy-duty industrial assemblies.

Handling Advice: DANGER: These large-diameter magnets carry immense snap velocity. With over 20 lbs of pull force and a wide surface area, they can jump toward each other or ferrous surfaces from several inches away with enough speed to shatter the brittle core or cause serious skin pinches and blood blisters. Always separate them by sliding the top magnet off the stack horizontally and handle with a firm, steady grip.

Warnings and Safety Information:

• Crush Hazard: Strong enough to cause blood blisters or severe skin pinches. Handle with caution.
• Choking Hazard: Keep strictly away from children and pets.
• Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.
• Electronics: Keep well away from hard drives, credit cards, and sensitive electronic testing equipment.

Applications:

• Concealed magnetic latches for heavy secret doors, panels, and luxury cabinetry
• Heavy-duty 3D-printed enclosures and removable structural partitions
• Secure mounting for heavy retail signage, lighting fixtures, and industrial graphics
• Magnetic couplers for professional robotics and mechanical prototypes
• High-performance proximity sensors requiring an expansive target area and robust field