![]() ![]() Because of their thickness and density, they pack more power into a small footprint. If you need a significant amount of pull force, cubes are your best bet. You’ll usually find rare earth magnets shaped into discs, bars, and squares. Magnets ranging from the size of a penny to a quarter can pull with 15 to 30 pounds of force, depending upon their rating. Even small 8-millimeter disc magnets in this consumer range can easily hold laminated sheets or paper stacks of five or more sheets. Most neodymium magnets on the consumer market are graded between N40 and N42. The amount of weight each magnet can hold depends on its size and thickness, but an N52 magnet contains about 50% more pull force (the amount of force, in pounds, it takes to move the magnet away from something) than an N35 magnet. Grades range from N35 (weakest) to N52 (strongest). Neodymium magnets are usually categorized by the power of their magnetic field (measured in gauss or tesla). Even coin-size magnets have enough attractive force to pinch fingers if used carelessly. Some manufacturers use well-protected neodymium magnets in toys, but these powerful rare earth magnets aren’t playthings. Many of these devices are designed to deactivate in a magnetic field for programming and testing purposes. Neodymium magnets can interfere with pacemakers and other implanted medical devices, so keep the magnets away from individuals who rely on such devices. ![]()
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