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N42 Neodymium Unmagnetised Ring Magnet - 25mm O.D x 16mm I.D x 5mm thick

Non-magnetic Neodymium (N42) ring.

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  • $6.97
Product Code: F2516U
Shape: Disc
Circular Face: 25mm dia
Thickness: 5mm
Grade: N42
Plating: Ni-Cu-Ni ( Nickel )
Material: NdFeB
  • 25mm outer diameter x 16mm inner diameter x 5mm thick
  • Coated with three layers of nickel, copper and nickel to reduce corrosion and provide a smooth finish

These Neodymium rings are identical in size and shape to our F2516 ring magnets. They can be used with the F2516 ring magnets to demonstrate how the intriguing 'eddy currents' produced by a magnet and copper pipe create a damping effect. A non-magnetic ring will slide down a length of copper pipe in an instant but the magnetised variation will descend slowly. A great way to bring magnets to life in the classroom.

Showing our 1 review for N42 Neodymium Unmagnetised Ring Magnet - 25mm O.D x 16mm I.D x 5mm thick. Write a review ›
Review Summary - 5 out of 5 based on 1 rating.
July 30, 2013 | Janesha
Perfect for my use!

Put the balls inside a toirrd shaped coil (bundle) of wire (that is the usual shape) Discharge a large capacitor through the wire. It only takes a few millisecond to magnetize the balls. Neil

Magnet Expert Ltd