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SM 18x200 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130273

GTIN: 5906301812753

Diameter Ø [±0,1 mm]

18 mm

Height [±0,1 mm]

200 mm

Weight

0.01 g

442.80 ZŁ with VAT / pcs + price for transport

360.00 ZŁ net + 23% VAT / pcs

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SM 18x200 [2xM5] / N42 - magnetic separator

Specification/characteristics SM 18x200 [2xM5] / N42 - magnetic separator

properties

values

Cat. no.

130273

GTIN

5906301812753

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

18 mm [±0,1 mm]

Height

200 mm [±0,1 mm]

Weight

0.01 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 main mechanism of the magnetic separator is the use of neodymium magnets, placed in a construction made of stainless steel mostly AISI304. In this way, it is possible to efficiently segregate ferromagnetic elements from other materials. A key aspect of its operation is the use of repulsion of magnetic poles N and S, which allows magnetic substances to be targeted. The thickness of the embedded magnet and its structure's pitch affect the range and strength of the separator's operation.

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

Yes, magnetic rollers are used in food production to remove metallic contaminants, including iron fragments or iron dust. Our rollers are constructed from acid-resistant steel, EN 1.4301, suitable for contact with food.

Magnetic rollers, often called cylindrical magnets, are used in metal separation, food production as well as recycling. They help in eliminating iron dust during the process of separating metals from other materials.

Our magnetic rollers are built with a neodymium magnet embedded in a tube of stainless steel with a wall thickness of 1mm.

From both sides of the magnetic bar will be with M8 threaded holes - 18 mm, enabling quick installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of features, magnetic bars stand out in terms of flux density, magnetic force lines and the field of the magnetic field. We produce them in two materials, N42 as well as N52.

Generally it is believed that the stronger the magnet, the better. However, the strength of the magnet's power is dependent 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 anticipated needs. The standard operating temperature of a magnetic bar is 80°C.

In the case where the magnet is thin, the magnetic force lines are more compressed. On the other hand, when the magnet is thick, the force lines are longer and reach further.

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

In a saltwater contact, type AISI 316 steel is highly recommended due to its outstanding corrosion resistance.

Magnetic rollers stand out for their specific arrangement of poles and their capability to attract magnetic particles directly onto their surface, as opposed to other devices that may utilize complex filtration systems.

Technical designations and terms pertaining to magnetic separators include amongst others polarity, magnetic induction, magnet pitch, as well as the type of steel used.

Magnetic induction for a magnet on a roller is determined using a teslameter or a gaussmeter with a flat Hall-effect probe, seeking the highest magnetic field value near the magnetic pole. The result is checked in a value table - the lowest is N30. All designations less than N27 or N25 indicate recycling that falls below the standard - they are not suitable.

Neodymium magnetic rollers offer many advantages, including a very strong magnetic field, the ability to capture even the tiniest metal particles, and durability. On the other hand, among the drawbacks, one can mention the requirement for frequent cleaning, greater weight, and potential installation difficulties.

To properly maintain of neodymium magnetic rollers, it’s worth regularly cleaning them from contaminants, avoiding high temperatures up to 80°C, and protecting them from moisture if the threads are not sealed – in ours, they are. The rollers our rollers have waterproofing IP67, so if they are leaky, the magnets inside can oxidize and weaken. Magnetic field measurements is recommended be carried out every two years. Care should be taken, as there is a risk of finger injury. 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 effective 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.

A magnetic roller is a magnetic separator made from a neodymium magnet enclosed in a cylindrical stainless steel housing, which are used to remove metal contaminants from bulk and granular materials. They are applied in industries such as food processing, ceramics, and recycling, where the removal of iron metals and iron filings is essential.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to immense strength, neodymium magnets have the following advantages:

They do not lose strength over time. After about 10 years, their strength decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic sources,
Thanks to the shiny finish and nickel, gold, or silver coating, they have an aesthetic 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 form) even at temperatures up to 230°C and above...
Due to the option of accurate forming and adaptation to individual needs – neodymium magnets can be produced in many variants of shapes or sizes, which enhances their versatility in applications.
Wide application in modern technologies – are used in HDD drives, electric motors, medical apparatus and various technologically advanced devices.

Disadvantages of neodymium magnets:

They are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a protective case. The steel housing in the form of a holder protects the magnet from impacts and at the same time increases its overall strength,
High temperatures can reduce the power of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent reduction in strength (although it is dependent on the shape and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
They rust in a humid environment - during outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
Possible danger arising from small pieces of magnets can be dangerous, if swallowed, which becomes significant in the context of child safety. It's also worth noting that small elements of these devices can complicate diagnosis after entering the body.

Exercise Caution with Neodymium Magnets

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

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.

Neodymium magnets can demagnetize at high temperatures.

Despite the fact that magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Neodymium Magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.

Neodymium magnets will bounce and contact together within a radius of several to around 10 cm from each other.

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are among the most powerful magnets on Earth. The surprising force they generate between each other can surprise you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional damage to the magnets.

Neodymium magnets are highly fragile, they easily break as well as can crumble.

Neodymium magnets are characterized by considerable fragility. Neodymium magnets are made of metal and coated with a shiny nickel, but they are not as durable 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.

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 are not toys, youngest should not play with them.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Safety rules!

So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are powerful neodymium magnets?.