Block ferrite magnets – childhood magnets

Block ferrite magnets, also called block, rectangular or cube ferrite magnets are some of the childhood magnets. Every adult has at some point, as a child, played with a ferrite magnet with which he magnetized iron filings in the form of magnetic fields. Now you can find at supermagneti.ro the version of ferrite magnets for big people and serious applications!

How do we distinguish them from other magnets? The ferrite magnet does not require coating and is dark gray graphite in color.

Ferrite magnets are considerably weaker than neodymium magnets, but they offer excellent strength and depth of field when the size or their volume becomes relatively large. An example is the popular Block ferrite magnet, 60x30x10 mm, power 4.1 kg. Two such ferrite magnets are quite difficult to separate!

A disadvantage of block ferrite magnets is that they cannot be manufactured in very small sizes because the force of attraction would be very low. Thus, the range of block ferrite magnets starts from Block ferrite magnet, 7x7x5 mm, power 200 grams. But the larger their size is, the greater the forces of attraction. And the giant of the category is Block ferrite magnet, 150x100x20 mm, power 20 kg . However, we do not recommend the smallest or strongest magnet. The choice of magnet depends primarily on the project you have and we can help you with our experience.

Block ferrite magnets – what popular applications do they have?

• fridge magnets. The most common use of a ferrite magnet is to make “fridge magnets” or magnetic souvenirs. You can find them used all over the world because they are very cheap, they are permanent, resistant to corrosion and heat. And we can say that these magnets like to travel a lot, crossing continents and countries on their way!
• electric motors and electric generators. Due to the fact that they withstand high temperatures and do not require coating, they are relatively cheap, block ferrite magnets are an excellent choice in industrial motors and generators, which need reliability.
• magnets for office and school. Being cheap and relatively easy to procure, not as dangerous to use as neodymium magnets, block ferrite magnets are used mainly in physics experiments. We can easily experiment like this about magnets and attraction, repulsion, magnetic levitation, magnetic field and other interesting properties. Or aluminum-nickel-cobalt magnets can be used.
• magnetic tools. Whether these are in the form of magnetic holders for the wrist, magnetic key retrievers, tool holders or iron collectors, they greatly facilitate the activity in a large or small workshop.

Should I buy a ferrite or neodymium magnet?

This is influenced by how you want to use the magnets. Here are some purchase suggestions:

We especially recommend buying ferita magnets in the following situations:
– Small budget per project
– Use in high temperature conditions (80-250 degrees Celsius)
– Indoor or outdoor use
– Aesthetics less important.

We especially recommend neodymium magnets in the following situations:
– High attraction or repulsion force is required
– Space is limited (miniaturization)
– The final object or project must be lighter
– The finish must be beautiful.

The cost of ferrite, as a material, is much lower than neodymium (Neodymium Iron Boron). On the other hand, a neodymium magnet has an adhesive force that is approximately 4-5 times greater than that of a ferrite magnet. If you calculate the cost per kg of adhesive force, ferrite magnets are approximately 2 to 3 times cheaper than neodymium magnets. This is especially true for block or ring magnets and for larger quantities, with magnets in small quantities things can be different.

Strong ferrite magnets are very large, which makes them dangerous even for children (see safety tips).

All ferrite ring magnets have poles on the larger surfaces plates (axial magnetization).

At supermagneti.ro you can find a varied range of ferita magnets in different forms: disc, rectangular and ring (toroidal).