CTM – CrackTest® Permanent Magnets Stainless Steel body are used as a pair for Magnetic Particle Inspection (MPI) or Magnetic Particle Testing (MPT). Permanent magnets are used when it is either not practical or not safe to be running AC power for and electromagnetic yoke.
The body of these magnets are machined here in Australia from stainless steel and use rare earth magnets behind a plated mild steel end cap.
The bodies are supplied with a mild steel keeper to contain the strong magnetism when not in use and for transport.
The stainless steel body configuration of these magnets where designed to be intrinsically safe. The stainless steel bodies of these magnets make safe for use in underground coal mines and other areas where aluminium items are banned.
These magnets lift the standard 18kg test block that is a strength requirement for the use of permanent magnets.
A rare-earth magnet is a strong permanent magnet made from alloys of rare earth elements, or lanthanide metals, with other metals. They are substantially stronger than ferrite or alnico magnets. The magnetic field produced by rare-earth magnets can be well over 1.2 teslas. By comparison, ferrite or ceramic magnets typically exhibit around 50 to 100 milli-teslas. The most powerful and affordable type of rare-earth magnet is a neodymium magnet. Neodymium magnets are made of neodymium, iron and boron in the formula Nd2Fe14B.