20mm od x 10mm id x 10mm thick Neodymium Ring Magnets N35 Powerful Rare Earth Circular Ring Magnets DIY Crafts (1 Pack)

20mm od x 10mm id x 10mm thick N35 Neodymium Ring Magnets Circular Ring Tube Hole Magnets Sale

• 20mm outer diameter x 10mm inner diameter x 10mm thick
• Each magnet’s north and south pole are on opposite circular faces
• Each magnet can support a steel weight of up to 5.69kg vertically from the magnetic face when in flush contact with a mild steel surface
• Excellent resistance to demagnetisation
• Coated with three layers of nickel, copper and nickel to reduce corrosion and provide a smooth finish

These versatile high-performance ring magnets, with north and south poles on opposing circular faces, have many uses. They are used in many everyday appliances such as vacuum cleaners plus motors, generators, rotor shafts and more. They can even be used to demonstrate intriguing ‘eddy currents’ using a 15mm copper pipe. Simply slide the ring over the pipe and let it slide down its length and watch it slowly descend as the eddy currents produced create a dampening effect. Compare this with our unmagnetised rings of the same dimensions by repeating and watch as the unmagnetised ring slides down the pipe in an instant. A great way to bring magnets to life in the classroom.

The 20mmx10mmx10mm ring magnet is a big and strong ring magnet. It can be tied to a rope and used to drag lakes and streams for metal objects. They can also be bolted to the wall or ceiling to hold tools or other objects. Multitudes of uses.