Neodymium magnets are brittle due to their composition, and susceptible to cracking or shattering if dropped on hard surfaces or collision occurs between magnets. In order to prevent oxidation and corrosion, Universal Magnetics disc magnets are coated with a layer of epoxy which does not affect magnetic energy or pull.
A Neodymium countersunk magnet is a Neodymium ring magnet with one side appearing as a standard ring but the other side has an angled countersink to take a screw head, the angle usually being (but not always) 90 degrees. A Neodymium counterbore ring magnet is a ring magnet with a cylindrical flat-bottomed hole on one side that enlarges the main cen1
Neodymium Countersunk Magnets and Counterbored Magnets. Great for many applications including door/cabinet closures, hanging art on a wall, and more! Neodymium Countersunk magnets are extremely popular neodymium block magnets with a countersunk central hole to allow the magnet to be easily fastened into place for a temporary or permanent fitt1
Rare earth magnets are the strongest type of permanent magnet currently made. They are amazingly powerful for their size and have innumerable uses. They are magnetized through the thickness. They are composed of neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Maximum working temp1
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