Strong Like Bull Magnets
Plain and simple, magnets are cool. If for nothing else they hold important scraps of paper and pictures to your filing cabinets and refrigerators. If you want the "best" magnets for this task, check out the Strong Like Bull Magnets. These magnets are a bit of over-engineered goodness. Read on for details and video.
The design starts with a substantial Neodimium Iron Boron disc magnet… These ‘rare earth’ magnets are the strongest type of magnets around… and I’m using the N52 grade, the highest strength grade available. Next the magnet is coupled to an engineered steel ‘cup’ which acts to direct the magnetic flux in a way which further increases the magnetic pull strength. The cup also ‘shields’ the magnetic force of all of the surfaces except the mounting surface, making them much safer to handle than an unshielded magnet. The magnet/cup assembly screws to a custom CNC machined aluminum housing part which is anodized for durability and color. Lastly, a rubber ring is added to further enhance the grip.