Educational Permanent Magnets

Chrome steel bar magnets were the class standard up until about 20 years ago. They had a number of disadvantages, however. They had to be stored with "keepers" (metal plates) & demagnetized easily if dropped or if one were used to repel another. They were largely displaced by stronger, more durable & cheaper AlNiCo (aluminum-nickel cobalt) made in Asia.

Neodymium magnet bars are much stronger, more expensive & are not magnetized lengthwise general. They are also brittle but are well suited for teaching applications such as for magnetic braking or various hobbies, crafts & 3D printing.

Indigo ferrite ceramic bar magnets are grade C5, painted blue-red & stamped to indicate their north & south magnetic poles. The N-S and magnetized at the ends for repulsion-attraction. This grade is about 1/2 the strength of typical Grade 2 AlNiCo bars & typically 1/5th the price per bar (compare our 75mm bar magnets to 3" AlNiCo). Their only disadvantage is being more brittle; fair trade off considering the cost difference.
 

Science Classroom Ferrite Bar Magnets

Ferrite bar magnets are just the right strength for hands-on experiments. Teachers can readily demonstrate the shape & presence of magnetic fields with compasses, iron filings or Magnaprobes. See also our video that uses Lego to build a magnetic test track to show force & motion. They also pass the paper clip test.

This makes them suitable for all grades and homeschooling with no special storage requirements needed. They are child safe as guaranteed by our Certificate of Analysis.
 

What Customers Say About Indigo Ferrite Bar Magnets

Some reviews on the 120mm bar magnet page:

• The product is good and I want to buy more.-Wendy
• I ordered these magnets to use for "polarity-confirming" on unmarked small spot-magnets that I use for my hobbies and for our healthcare disk-magnets. They work perfectly in those applications and are totally suitable for our purposes. Thank You for the great product and the great deal, Indigo!-Cat Daddy