About Neodymium Magnets
Most of our disc and cylinder magnets are labeled as axially magnetized because the magnetization direction is through the axis of the magnet. That means that the poles of the magnet will be on the large flat surfaces of disc and cylinder magnets rather than the rounded sides.
Most of our countersunk and self-adhesive magnets come in equally paired packs, enabling you to use them as attachments to other magnets if desired. The product detail page will specify whether the magnets come paired or not. For pairing with steel discs or other plates, the north/south orientation of the countersunk hole or adhesive tape is not an issue as both the north and south pole will be equally attracted to steel surfaces.
According to Merriam Webster, neo·dym·i·um – pronounced nē-ō-ˈdi-mē-um – is a silver-white to yellow colored metallic element (symbol Nd) of the rare earth group that is used primarily in magnets and lasers.
We use the description "magnetized thru thickness" to identify the locations of the poles on our block magnets. Thickness is always the last listed dimension and is also usually the smallest. For most of our block magnets, that means that the magnets stick or repel in the middle, on the large flat surfaces, rather than at the end of the block.
Neodymium magnets are composed mainly of neodymium, iron, and boron. If they are not plated, the iron in the material will oxidize, particularly if exposed to moisture. Even normal humidity will rust any iron over time. In order to preserve and protect the lasting performance of each magnet’s magnetic field, most neodymium magnets are plated or coated.Nickel is the most common choice, as it is durable and cost-effective. Our magnets are coated with a triple plating of nickel/copper/nickel. This creates a shiny silver finish and provides dependable resistance to corrosion in most applications. If you are interested in different coating...