🔹High-Power 270 lb Pull Force Engineered with a neodymium-iron-boron core and steel cup housing to deliver up to 270 pounds of direct vertical pull under ideal surface contact — perfect for heavy-duty industrial or workshop applications. 🔹Durable Steel Cup Design Protective steel housing amplifies magnetic strength while shielding the core from impact, chipping, and demagnetization. Concentrates magnetic energy on the active face for focused, efficient performance. 🔹Precision Countersunk Mounting Hole Integrated countersunk center hole allows secure attachment with screws or bolts. Provides reliable mounting on wood, plastic, or non-magnetic surfaces for versatile installation across industrial, lab, and workshop settings. 🔹Corrosion & Wear Resistant Finish Triple-layer Nickel-Copper-Nickel plating ensures long-lasting protection against rust, moisture, and wear. The smooth metallic surface resists oxidation, maintaining consistent performance over years of use. 🔹Versatile Industrial Applications Ideal for metal holding, retrieval, mounting, and fixture positioning. Commonly used in manufacturing, fabrication, tool organization, magnetic jigs, and scientific testing setups requiring dependable magnetic performance. 🧲 2.5" Neodymium Cup Magnet with Countersunk Hole – 270 lb Pull Force Rare Earth Permanent Mounting Magnet for Industrial, Workshop & Engineering Use Industrial Strength with Precision Design This 2.5-inch neodymium cup magnet delivers an exceptional 270 lb pull force, combining raw magnetic power with a design built for precision, safety, and durability. The integrated countersunk mounting hole allows for secure attachment to a wide range of surfaces — wood, plastic, and non-ferrous metals — making it a trusted choice for engineers, fabricators, and technicians who demand dependable performance in their equipment, tools, and fixtures. Designed with a high-grade NdFeB (Neodymium-Iron-Boron) magnetic core, this magnet generates one of the strongest permanent magnetic fields available for its size. Encased within a protective steel cup, it concentrates and channels the magnetic field toward the active face, multiplying the holding force and protecting the magnet from damage or demagnetization. Precision Engineering for Maximum Pull Force Every aspect of this magnet’s construction is engineered for efficiency and strength. The 2.5" outer diameter and countersunk bore work in harmony to distribute magnetic flux evenly while minimizing lateral slippage. The steel pot housing increases the effective magnetic force by up to 3.5× compared to a bare neodymium disc magnet. The result is a magnetic mount capable of supporting up to 270 lbs of direct vertical pull on clean, thick steel under ideal conditions. This makes it ideal for demanding applications where both high strength and reliability are required — from industrial holding and lifting to precision alignment and metal retrieval. Key Technical Specifications Feature Details Magnet Type Neodymium-Iron-Boron (NdFeB) Shape Cup Magnet with Countersunk Hole Outer Diameter (OD) 2.5 inches (≈63.5 mm) Thickness 0.35 inches (≈9 mm) Mounting Hole Type Countersunk for Screw or Bolt Pull Force (Ideal Conditions) 270 lbs Plating/Coating Nickel-Copper-Nickel Triple Layer Operating Temperature ≤176°F (80°C) Magnetization Axial (through thickness) Material Housing Carbon Steel Shell Field Concentration Focused on Active Face Quantity 1 Magnet per Unit How Cup Magnets Amplify Strength A standard neodymium disc magnet emits magnetic flux equally in all directions, which can waste much of its energy. By encasing the magnet within a steel pot, the flux lines are redirected toward the exposed face — concentrating the magnetic energy exactly where it’s needed. This design provides several key advantages: ⚙️ Increased Holding Force: The steel housing multiplies effective pull. 🧲 Reduced Stray Fields: The magnetic energy is directed forward rather than radiating outward. 🧱 Structural Protection: The steel shell prevents chipping or cracking during handling. 🔩 Mounting Flexibility: The countersunk hole enables easy and secure installation with standard hardware. Because of this design, cup magnets offer both higher holding power and greater mechanical durability compared to exposed neodymium discs. High-Grade Neodymium Core The NdFeB core is the heart of this magnet. Each unit is built from a Grade N35–N42 magnetic alloy, offering the ideal balance between magnetic strength, cost-efficiency, and temperature stability. Benefits of Neodymium Magnetic Material: High coercivity (resists demagnetization). Compact yet powerful magnetic field density. Predictable and stable performance over time. Maintains strength across countless use cycles. This ensures the 2.5-inch cup magnet maintains full field intensity even in repetitive industrial use. Durable Nickel-Copper-Nickel Coating To extend the life of each magnet, a triple-layer coating system is applied — Nickel + Coppe