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SM 32x250 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130299

GTIN: 5906301812920

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

250 mm

Weight

1240 g

750.30 ZŁ with VAT / pcs + price for transport

610.00 ZŁ net + 23% VAT / pcs

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SM 32x250 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 32x250 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130299

GTIN

5906301812920

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

250 mm [±0,1 mm]

Weight

1240 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N42

properties

values

units

coercivity bHc ?

860-955

kA/m

coercivity bHc ?

10.8-12.0

kOe

energy density [Min. - Max.] ?

318-334

BH max KJ/m

energy density [Min. - Max.] ?

40-42

BH max MGOe

remenance Br [Min. - Max.] ?

12.9-13.2

kGs

remenance Br [Min. - Max.] ?

1290-1320

actual internal force iHc

≥ 955

kA/m

actual internal force iHc

≥ 12

kOe

max. temperature ?

≤ 80

°C

Physical properties of NdFeB

properties

values

units

Vickers hardness

≥550

Density

≥7.4

g/cm³

Curie Temperature TC

312 - 380

°C

Curie Temperature TF

593 - 716

°F

Specific resistance

150

μΩ⋅Cm

Bending strength

250

Mpa

Compressive strength

1000~1100

Mpa

Thermal expansion parallel (∥) to orientation (M)

(3-4) x 106

°C^-1

Thermal expansion perpendicular (⊥) to orientation (M)

-(1-3) x 10-6

°C^-1

Young's modulus

1.7 x 104

kg/mm²

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The device roller magnetic is based on the use of neodymium magnets, which are embedded in a casing made of stainless steel mostly AISI304. In this way, it is possible to effectively segregate ferromagnetic particles from different substances. A key aspect of its operation is the repulsion of N and S poles of neodymium magnets, which allows magnetic substances to be attracted. The thickness of the magnet and its structure pitch determine the power and range of the separator's operation.

Generally speaking, magnetic separators are used to separate ferromagnetic elements. If the cans are ferromagnetic, the separator will effectively segregate them. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the magnetic separator will not be effective.

Yes, magnetic rollers find application in food production to clear metallic contaminants, including iron fragments or iron dust. Our rods are constructed from acid-resistant steel, EN 1.4301, approved for contact with food.

Magnetic rollers, often called cylindrical magnets, are used in food production, metal separation as well as waste processing. They help in removing iron dust in the course of the process of separating metals from other wastes.

Our magnetic rollers consist of neodymium magnets anchored in a stainless steel tube casing of stainless steel with a wall thickness of 1mm.

Both ends of the magnetic bar will be with M8 threaded holes - 18 mm, which enables quick installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of forces, magnetic bars differ in terms of magnetic force lines, flux density and the field of the magnetic field. We produce them in materials, N42 as well as N52.

Usually it is believed that the stronger the magnet, the more effective. Nevertheless, the strength of the magnet's power is based on the height of the used magnet and the quality of the material [N42] or [N52], as well as on the area of use and expected needs. The standard operating temperature of a magnetic bar is 80°C.

In the case where the magnet is more flat, the magnetic force lines will be short. Otherwise, when the magnet is thick, the force lines are longer and reach further.

For making the casings of magnetic separators - rollers, frequently stainless steel is employed, particularly types AISI 304, AISI 316, and AISI 316L.

In a salt water environment, type AISI 316 steel is recommended thanks to its outstanding corrosion resistance.

Magnetic rollers are characterized by their specific arrangement of poles and their ability to attract magnetic particles directly onto their surface, in contrast to other separators that may utilize more complicated filtration systems.

Technical designations and terms related to magnetic separators comprise among others magnet pitch, polarity, and magnetic induction, as well as the type of steel used.

Magnetic induction for a roller is determined using a teslameter or a gaussmeter with a flat Hall-effect probe, seeking the highest magnetic field value close to the magnetic pole. The result is verified in a value table - the lowest is N30. All designations less than N27 or N25 indicate recycling that doesn't meet the standard - they are not suitable.

Neodymium magnetic bars offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. On the other hand, among the drawbacks, one can mention the need for regular cleaning, higher cost, and potential installation challenges.

For proper maintenance of neodymium magnetic rollers, it’s worth they should be regularly cleaned, avoiding temperatures up to 80°C. The rollers our rollers have waterproofing IP67, so if they are leaky, the magnets inside can oxidize and lose their power. Testing of the rollers is recommended be carried out once every 24 months. Care should be taken, as there is a risk getting pinched. If the protective tube is only 0.5 mm thick, it may wear out, which in turn could cause problems with the magnetic rod seal and product contamination. The range of the roller is equal to its diameter: fi25mm gives an active range of about 25mm, while fi32 gives an active range of about 40mm.

Magnetic rollers are cylindrical neodymium magnets placed in a casing made of corrosion-resistant stainless steel, which are used to remove metal contaminants from bulk and granular materials. They are used in the food industry, recycling, and plastic processing, where metal separation is crucial.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their long-term stability, neodymium magnets provide the following advantages:

They do not lose their even during nearly ten years – the loss of strength is only ~1% (based on measurements),
They show superior resistance to demagnetization from outside magnetic sources,
Thanks to the polished finish and nickel coating, they have an elegant appearance,
They have very high magnetic induction on the surface of the magnet,
Thanks to their high temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
With the option for customized forming and personalized design, these magnets can be produced in multiple shapes and sizes, greatly improving design adaptation,
Key role in cutting-edge sectors – they are used in HDDs, electric motors, diagnostic apparatus as well as technologically developed systems,
Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of rare earth magnets:

They are prone to breaking when subjected to a heavy impact. If the magnets are exposed to physical collisions, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks and strengthens its overall strength,
High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on form). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
Magnets exposed to damp air can degrade. Therefore, for outdoor applications, we recommend waterproof types made of non-metallic composites,
Using a cover – such as a magnetic holder – is advised due to the restrictions in manufacturing complex structures directly in the magnet,
Safety concern linked to microscopic shards may arise, in case of ingestion, which is important in the protection of children. Furthermore, miniature parts from these assemblies can disrupt scanning if inside the body,
In cases of tight budgets, neodymium magnet cost is a challenge,

Precautions

Neodymium magnets are the most powerful magnets ever created, and their strength can shock you.

Familiarize yourself with our information to properly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.

Never bring neodymium magnets close to a phone and GPS.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

If you have a finger between or on the path of attracting magnets, there may be a large cut or even a fracture.

Neodymium magnets are not recommended for people with pacemakers.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Keep neodymium magnets away from TV, wallet, and computer HDD.

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Magnets should not be treated as toys. Therefore, it is not recommended for youngest children to have access to them.

Not all neodymium magnets are toys, so do not let children play with them. Small magnets pose a serious choking hazard or can attract to each other in the intestines. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

The magnet coating contains nickel, so be cautious if you have a nickel allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Magnets made of neodymium are particularly fragile, resulting in damage.

Neodymium magnetic are highly delicate, and by joining them in an uncontrolled manner, they will crumble. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

Be careful!

To show why neodymium magnets are so dangerous, see the article - How dangerous are strong neodymium magnets?.