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Round Base Magnets - Round Cup Magnets

Round Base/Round Cup Magnets

Our Round Base Magnet assemblies, also known as Round Cup Magnets, RB Magnets or Magnetic Cup Assemblies, are plated with a nickel finish. They are made with either neodymium or ceramic magnets, which are combined with steel cups. With this type of design, the magnetic holding force is multiplied many- fold, to provide a holding magnet assembly that is significantly stronger than an individual magnet, and for an economical price!  

  • Constructed of a steel cup with a ring magnet assembled inside, the round magnetic cups have a mounting hole provided for easy attachment. Available with ceramic or neodymium magnets built inside the cup. The ceramic magnet types are designed so that the magnets have an inside diameter which is larger than the diameter of the hole in the cup. The Neodymium magnet types have a countersink, so there’s room for a screw head for mounting purposes.
  • RB magnets are commonly used for consumer & industrial applications that require extremely strong magnets. They are ideal for lifting, holding and positioning purposes as well as mounting applications for indicators, lights, lamps, antennas, inspection equipment, furniture fixings, cabinet making, gate latches, closing mechanisms & soft drawer closures, DIY projects, machinery, vehicles, and more. Click here for approximate pull information.

Refer to the diagrams below for neodymium & ceramic magnet dimensions - note, all dimensions are in inches. Click on the images to enlarge:                                  

Neodymium Magnet Dimensions          Ceramic Magnet Dimensions

Neodymium                                                                            Ceramic 


Nickel Finished Round Based Magnets 

  • What does "approximate pull Info" mean? The Approximate Pulls listed here are for reference only. These values are calculated under the assumption that the magnet will be attached to a flat, ground 1/2" thick mild steel plate. Coatings, rust, rough surfaces, and certain environmental conditions can significantly reduce the pull force. Please be sure to test the actual pull in your actual application, and for critical applications, it is suggested that the pull be de-rated by a factor of 2 or more, depending on the severity of a potential failure. (top)
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