3pcs 32mm x 5mm x Hole 5mm Neodymium Straight Ring Magnet – N52 Grade

Key Features:

Dimensions: 32mm Outer Diameter × 5mm Thickness × 5mm Inner Hole Diameter
Straight Hole Profile: Uniform 5mm cylindrical inner diameter (no countersink) for shaft-mounting and bolt-through assemblies
Precision Tolerance: ±0.05mm
Magnet Grade: N52
Pull Force: Approx. 33.3 lbs
Coating: Nickel-Copper-Nickel (Ni-Cu-Ni) triple-layer plating for superior durability
Magnetization: Axially magnetized (Poles on the flat circular faces, uniform flux distribution)

Material Description:

Our 32mm x 5mm uniform N52 ring magnets are engineered specifically for complex mechanical, automation, and industrial fabrication projects where a non-countersunk through-hole is mandatory. The straight 5mm inner bore allows this magnet to be seamlessly pressed onto steel axles, utilized in magnetic bearings, or held securely via non-magnetic machine bolts and pins. Because the surfaces remain entirely flat on both sides, this ring can be stacked back-to-back to compound magnetic force or used in alternating arrays for high-torque magnetic couplings and contactless drive systems.

Handling Advice: EXTREME DANGER: Industrial-scale ring magnets require strict, controlled handling. With nearly 35 lbs of pull force, two rings will accelerate toward steel surfaces or each other with bone-crushing velocity. Impact WILL cause the brittle neodymium core to snap or shatter into sharp fragments and can result in severe finger pinch injuries. Always handle individually, keep spaced far apart, and use wooden or plastic spacers when separating.

Warnings and Safety Information:

Severe Crush Hazard: High risk of serious skin pinching, blood blisters, or finger injuries. Professional handling required.
Brittle Core Warning: Sintered neodymium is fragile. High-impact collisions or dropping onto hard surfaces will shatter the ring wall.
Medical Safety: KEEP AWAY from pacemakers and sensitive medical implants at all times.
Electronics & Media: Keep well away from hard drives, credit cards, magnetic media, and sensitive electronic instrumentation.

Applications:

High-torque magnetic couplings and contactless drive linkages for automated manufacturing systems
Industrial magnetic bearings, guide rollers, and shaft-mounted rotational assemblies
Pass-through sensor rings for heavy automation, pneumatic pistons, and Hall-effect setups
Heavy-duty workshop tool organization, magnetic separator systems, and heavy jig fixtures
Secure bolt-through anchoring for heavy equipment access hatches and machine guarding panels