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CUBE Magnets
Symmetrical Rare Earth Cubes
Neodymium Cube Magnets (Rare Earth NdFeB)
Engineered with identical dimensional geometry on all six sides (Length = Width = Height), our sintered neodymium cube magnets deliver high holding strength, tight grinding tolerances, and clean flat mating surfaces. Standard stock cubes are magnetized through two opposing square faces, allowing them to stack into rigid magnetic columns, form high-efficiency Halbach arrays, or fit square mortise cavities in consumer electronics, robotics, precision sensors, and custom woodworking.
Looking for rectangular bars or screw-mounted magnets? If your assembly requires uneven length, width, and thickness dimensions, view our complete Neodymium Bar & Block Magnets. For flush screw-mounting into drywall or timber, browse our Countersunk Block Magnets.
Explore Alternative Shapes & Assemblies:
1:1:1 Equal Symmetry
Uniform length, width, and height make cubes easy to press-fit into square milled pockets.
Halbach Array Optimized
Flat square faces facilitate easy 90° rotational alignment to augment one-sided magnetic fields.
Broad Grade Selection
Stocked in N42, N45, N50, and N52 with pull forces ranging from 1.7 lbs up to 150+ lbs.
Precision Ground Finish
Triple-layer Ni-Cu-Ni plating with strict tolerances (±0.002") for predictable industrial fit.
Engineering Guide: Rare Earth Neodymium Cube Magnets
Neodymium cube magnets are characterized by three identical orthogonal dimensions. While visually uniform on all six sides, standard cube magnets are anisotropic and magnetized through two opposing flat faces. Because of their equal aspect ratio (Permeance Coefficient, Pc ≈ 1.0), cube magnets operate comfortably above the knee of the B-H demagnetization curve, providing excellent resistance to self-demagnetizing fields.
Standard Cube Sizes & Pull Force Reference
| Cube Side Dimension | Typical Grade | Nominal Pull Force | Common Engineering Applications |
|---|---|---|---|
| 1/8" (3.18 mm) | N45 | ~1.7 lbs (0.77 kg) | Micro-sensors, precision instruments, educational models. |
| 1/4" (6.35 mm) | N42 / N52 | 6.3 – 7.5 lbs | Square cabinetry catches, miniature magnetic couplers, electronics. |
| 1/2" (12.7 mm) | N42 / N52 | 25 – 31 lbs | Stud finders, heavy-duty holding jigs, Halbach magnetic arrays. |
| 3/4" (19.05 mm) | N42 / N52 | 56 – 68 lbs | Industrial metal fabrication clamps, robotic tooling grippers. |
| 1" to 2" (25.4 – 50.8 mm) | N42 / N52 | 120 – 150+ lbs | Heavy industrial lifting, particle accelerators, high-flux separation. |
Halbach Arrays & Industrial Assemblies
- Halbach Array Construction: Due to their identical square faces, cube magnets are the preferred building block for assembling linear Halbach arrays. Rotating the magnetic vector by 90° from cube to cube augments the magnetic field on one side of the array while nearly canceling the field to zero on the reverse side.
- Non-Destructive Wall Stud Finding: 1/2" and 3/4" neodymium cubes act as precise, non-electronic stud finders by freely tilting and snapping directly onto drywall screw or nail heads hidden beneath thick plaster.
- Square Mortise Woodworking: Unlike round disc magnets that require precise depth boring, cubes seat squarely into routed tracks and square dados for invisible magnetic panel joins.
- Mechanical Tooling & Fixtures: Used in welding jigs and CNC machine beds to hold ferrous stock rigidly at 90° right angles.
Frequently Asked Questions
Are all six sides of a cube magnet magnetic?
Standard cube magnets are anisotropic and magnetized through two opposing flat faces (one face is North, the opposite face is South). The remaining four lateral sides will attract steel objects because magnetic flux loops from North to South, but the strongest direct holding force is concentrated strictly on the two pole faces.
Can cube magnets be magnetized diagonally through opposite corners?
While standard inventory is magnetized face-to-face, CMS Magnetics can manufacture diagonally magnetized cubes where poles sit on opposite diagonal corners for specialized research, physics demonstrations, and custom multi-axis rotor prototypes.
Why do cube magnets require special handling precautions?
Because cubes feature sharp 90° corners, high-energy grades (such as N52 cubes 1/2" and larger) experience severe mechanical point stresses if permitted to snap together. Direct high-velocity impact can cause the brittle sintered NdFeB alloy to chip or fracture. Always use non-magnetic spacers when separating and handling large cubes.
What is the maximum operating temperature for neodymium cube magnets?
Standard stock grades (N42 to N52) operate reliably up to 80°C (176°F). For applications near heat sources or motors, high-coercivity grades: M (100°C), H (120°C), and SH (150°C) can be custom ordered.