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SM 32x375 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130379

GTIN: 5906301813279

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

375 mm

Weight

2010 g

1 119.30 ZŁ with VAT / pcs + price for transport

910.00 ZŁ net + 23% VAT / pcs

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SM 32x375 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 32x375 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130379

GTIN

5906301813279

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

375 mm [±0,1 mm]

Weight

2010 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, which are placed in a casing made of stainless steel mostly AISI304. Due to this, it is possible to effectively remove ferromagnetic particles from the mixture. An important element of its operation is the repulsion of magnetic poles N and S, which causes magnetic substances to be targeted. The thickness of the magnet and its structure pitch determine the power and range of the separator's operation.

Generally speaking, magnetic separators serve to extract 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 separator will not be able to separate them.

Yes, magnetic rollers find application in the food sector to clear metallic contaminants, such as iron fragments or iron dust. Our rods are made from durable acid-resistant steel, EN 1.4301, suitable for contact with food.

Magnetic rollers, often called magnetic separators, find application in food production, metal separation as well as recycling. They help in removing iron dust in the course of the process of separating metals from other materials.

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

Both ends of the magnetic bar will be with M8 threaded openings, which enables 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 magnetic force lines, flux density and the area of operation 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 more effective. But, the value of the magnet's power depends 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.

If the magnet is thin, the magnetic force lines will be more compressed. Otherwise, when the magnet is thick, the force lines will be extended and extend over a greater distance.

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

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

Magnetic rollers are characterized by their unique configuration of poles and their ability to attract magnetic particles directly onto their surface, as opposed to other separators that may utilize more complicated filtration systems.

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

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

Neodymium magnetic bars offer a range of benefits such as higher attracting power, longer lifespan, and effectiveness in separating fine metal particles. On the other hand, among the drawbacks, one can mention higher cost compared to other types of magnets and the need for regular maintenance.

For proper maintenance of neodymium magnetic rollers, it is recommended regularly cleaning them from deposits, avoiding high temperatures up to 80°C, and protecting them from moisture if the threads are not sealed – in ours, they are. The rollers feature waterproofing IP67, so if they are leaky, the magnets inside can oxidize and lose their power. Magnetic field measurements should be carried out every two years. 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 lead to problems with the magnetic rod seal and product contamination. The range of the roller corresponds 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, used for separating ferromagnetic contaminants from raw 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 and disadvantages of neodymium magnets NdFeB.

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose their even over approximately ten years – the decrease of strength is only ~1% (according to tests),
They show strong resistance to demagnetization from outside magnetic sources,
The use of a mirror-like nickel surface provides a refined finish,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to form),
The ability for precise shaping or customization to custom needs – neodymium magnets can be manufactured in many forms and dimensions, which extends the scope of their use cases,
Important function in advanced technical fields – they are utilized in computer drives, electric drives, clinical machines along with sophisticated instruments,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of neodymium magnets:

They may fracture when subjected to a powerful impact. If the magnets are exposed to external force, we recommend in a metal holder. The steel housing, in the form of a holder, protects the magnet from fracture while also enhances its overall resistance,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent decline in performance (depending on height). 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,
They rust in a wet environment. For outdoor use, we recommend using sealed magnets, such as those made of non-metallic materials,
The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is difficult,
Possible threat due to small fragments may arise, when consumed by mistake, which is significant in the health of young users. Additionally, miniature parts from these devices can interfere with diagnostics after being swallowed,
High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications

Precautions

The magnet is coated with nickel. Therefore, exercise caution if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets are fragile and can easily break and shatter.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

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.

Magnets will attract each other within a distance of several to about 10 cm from each other. Don't put your fingers in the path of magnet attraction, because a major injury may occur. Depending on how massive the neodymium magnets are, they can lead to a cut or a fracture.

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 astonishing force they generate between each other can shock you.

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

Do not bring neodymium magnets close to GPS and smartphones.

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.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

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. You should especially avoid placing neodymium magnets near electronic devices.

Do not give neodymium magnets to youngest children.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Neodymium magnets can demagnetize at high temperatures.

Although magnets are generally resilient, their ability to retain their magnetic strength can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Warning!

To raise awareness of why neodymium magnets are so dangerous, read the article titled How very dangerous are powerful neodymium magnets?.