Collection: N52 Neodymium Sphere Magnets (Ball Magnets)

N52 neodymium sphere magnets

These ball magnets roll freely, so each one turns to match its partner's polarity the moment they meet, which makes them a forgiving choice for rotating and articulated builds where a fixed magnet would fight you. Every sphere is N52, the strongest commercial neodymium grade, triple-plated in nickel-copper-nickel, and sold in metric sizes from 2mm to 20mm. Hobbyists reach for them on turrets, ball-and-socket joints, and posable limbs for tabletop miniatures; jewelry and craft makers use them as hidden clasps; and the larger sizes are a staple for classroom magnetism demonstrations.

• Self-aligning: spins to find the correct polarity every time
• N52 strength: the strongest commercial neodymium grade
• Metric sizing: 2mm to 20mm for consistent, repeatable fits
• Ni-Cu-Ni coating: triple-plated for durability

Common uses

• Rotating turrets and articulated joints on models and miniatures
• Ball-and-socket poses and swappable limbs
• Hidden clasps for jewelry, bags, and garments
• Sewing and craft closures
• Science and classroom magnetism demonstrations
• Retail displays and point-of-sale fixtures

Choosing a size

As a rough guide: 2 to 3mm suits small joints and jewelry, 5mm handles most model turrets and medium joints, 8 to 12mm gives a stronger hold for heavier parts, and 16 to 20mm suits display stands and classroom demos. Match the sphere to the weight it needs to hold rather than the largest that will fit.

Frequently asked questions

Why do sphere magnets self-align? A sphere has no fixed pole facing outward. Because it can roll, it rotates until its north and south line up with the magnet it meets, so the two always attract instead of repelling.

How strong are they? All are N52. Holding force rises with diameter, so a 20mm sphere holds far more than a 5mm one. Pick by the load, not the size of the gap.

Which size should I use for a model turret? 5mm is the common choice for 28 to 32mm-scale turrets and medium joints. Step up to 8mm for heavier resin or metal parts.

Are they safe to handle? Neodymium is brittle and pinches hard. Keep spheres away from children and pets, since swallowed magnets can cause serious injury, and let the larger sizes approach each other slowly so they don't chip.