![]() I want more technical details: How do they really work? (WARNING: Technical Content Follows) This might prevent someone from pinching his or her fingers unexpectedly. You won't hurt the Magswitch ® by turning it on while loose, but it’s safer not to have that surprisingly strong pull force on while sitting lose. It’s recommended to only turn on the Magswitch ® when you have it up against the thing you’re sticking it to. Like all neodymium magnets, high temperatures can partially demagnetize them. This is true of all magnets.ĭon’t heat up Magswitch ® magnets. You’re not going to be able to apply 150 lb of shear or sideways force against an MJ-150 and expect it not to move. In what direction is a force pulling on the magnet? This also matters a great deal. Maybe your surface has an irregular shape this might also affect the force. If it’s painted, the magnet is a tiny bit farther away from the steel, so you get less force. The condition of the surface also matters. It’s not nearly as strong when we stick it to a cheap filing cabinet made of thin steel. The incredibly powerful MS-400 can hold hundreds of pounds when we stick it to a thick I-beam. If your material is thin, you’ll see less force. ![]() In most cases, you’re not going to see strengths quite that high. The pull force numbers listed on these products are the force required to pull them away from a really big, thick steel surface in ideal conditions. (If you don't need an ON/OFF switch, plain neodymium magnets continue to be awesome as well!) Practical advice on using Magswitch ® magnets It's easier and less expensive to just buy an MJ-95 or MJ-150 and get on with it. It’s a great magnet-science demo, but you’re probably not going to save money with assemblies like this. We also found that we spent more money on magnets and parts from the hardware store than if we had just bought a Magswitch ®. However, we learned that assembly is a real challenge. Initially, when building it, we thought we might show all the details so our readers could learn how to do it themselves (and maybe buy some K&J magnets to do it). It’s a great demonstration of how it works. We put them side-by-side to make it easier to build and see. We chose ring magnets instead of cylinders because they were easier to mount using off-the-shelf hardware. The example shown uses two RC4CDIA, diametrically magnetized ring magnets. In fact, when we started investigating how these things worked, we couldn’t resist building one ourselves! Is it physically possible to make something like this using a few neodymium magnets from K&J? Sure, it’s possible. Some of these large blocks, housed in clamps, project magnetic power through plastic pipes in order to crush or dissemble contaminants, turning hard water soft.Rudimentary switchable magnet made with RC4CDIA ring magnets This method enhances the uniform look of an artefact, and protects materials by disengaging at a pre-determined pressure threshold saving cracking or destruction of materials common with overcommitted fasteners (glues and screws).īlock magnets also live in many water treatment devices for the purpose of attracting, arresting and capturing heavy metals, mineral salts and scale (boiler rust). Magnetic engagement as a permanent fastening agency is useful where removing and reattaching componentry is required for servicing or cleaning. Blocks are housed in purpose made channels to hold or fasten fabrications together. They all have six sides and joined elevations are at right angles with each other. ![]() Block magnet forms are either rectangular, square or a cube.
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