D72 x d32 x 10 / F30 - ferrite magnet

D72 x d32 x 10 / F30 - ferrite magnetD72 x d32 x 10 / F30 - ferrite magnet€0.78

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Of Price Net Price Gross
1 pcs. €0.78 €0.96
220 pcs. €0.69 €0.85
600 pcs. €0.64 €0.79
Quantity
Available Quantity: 4207 pcs.

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Performance parameters

External diameter

72 [mm] +2,5%/-2,5%

Internal diameter

32 [mm] +2,5%/-2,5%

Height

10 [mm] +0,1/-0,1

magnetizing direction along dimension

10 [mm]

Direction of magnetization along the height means that one circular surface of a magnet makes the N-pole, while the other – opposite – circular surface refers to the S-pole.

Grade

F30

Magnet type

Ferrite

Maximal hoisting capacity

5,8 [kg]

The pull force was measured by using metal sheet 10 [mm] thick, acting with perpendicular detaching force. With the force acting on the sliding off, the lifting capacity of the magnet will be 5 times smaller. The air gap comprised between the metal sheet and a magnet causes reduction in the pull force.

Maximum working temperature

250 [°C]

For flat magnets and magnets mounted in the open magnetic circuit working temperature may be insignificantly lower. For high magnets and magnets mounted in the closed magnetic circuit working temperature equals max. working temperature for a given material. Curie’s temperature is ~ 450°[C]. Temperature coefficient of remanence TK(Br): approx. -0,19 %/°[C]. Temperature coefficient of coercivity TK(HcJ): approx. 0,40 %/°[C].
Ferrite magnets do not require anticorrosive protection. They my be used in water.
As ceramic magnets, ferrite magnets are brittle.

Weight

139,22 [g]

All the numbers quoted were obtained as a result of tests with one specific item in a room temperature and are intended to serve for comparison of practical magnetic properties of magnets offered by the shop.
Magnetic properties of material grade F30

remanence Br

min. 0,37 [T]

coercivity HcB

min. 175 [kA/m]

coercivity HcJ

min. 180 [kA/m]

energy product (BH)max

min. 26 [kJ/m3]

Magnetic properties of a particular material, together with its shape, volume, max. working temperature and direction of magnetization have influence on practical magnetic properties of a magnet.
As an example, you will find attached a graph of a course of the II quadrant of magnetic hysteresis loop for a material grade F30.
Physical proprieties

density

~4,5 [g/cm3]

resistivity

104 - 108 [uOhm x cm]

F30
mp72x32x10f30
4207 Items
Specific References