40mm x 6mm (1.57" x 0.236") Neodymium Disc Magnet – N52 Grade 

Key Features:

• Dimensions: 40mm Diameter × 6mm Thickness
• Precision Tolerance: ±0.05mm 
• Magnet Grade: N52 
• Pull Force: Approx. 42.5 lbs
• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating 
• Magnetization: Axially magnetized (Poles on the large flat faces)
• Surface Gauss: Approx. 3,150 Gauss

Material Description:

Our 40x6mm N52 discs are engineered for applications where an incredibly deep and powerful magnetic field is mandatory. The 6mm thickness creates a significant magnetic volume that can penetrate through thick non-magnetic barriers like heavy structural timber, industrial plastics, or composite housings. These are the premier choice for heavy-duty hidden latches, industrial magnetic separators, and securing heavy equipment in high-vibration environments where smaller magnets fail.

Handling Advice: DANGER: These magnets possess immense snap velocity. With nearly 40 lbs of pull force, two magnets will jump together from several inches away with enough speed to shatter the brittle core or cause serious injury to fingers (crushing or blood blisters). Always handle one at a time and use non-magnetic spacers. NEVER let them snap together or onto steel surfaces without controlled mechanical assistance.

Warnings and Safety Information:

• Crush Hazard: High risk of serious skin and finger injury. Handle with industrial-strength focus.
• 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:

• Heavy-duty magnetic stirrers for high-viscosity laboratory and industrial chemistry
• Concealed structural latches for heavy secret doors, thick panels, and security safes
• Industrial-strength tool organization and heavy equipment mounting in workshops
• High-torque magnetic couplers and rotors for professional robotics or renewable energy prototypes
• Magnetic separation systems for removing ferrous contaminants from bulk materials