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SM 25x100 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130366

GTIN: 5906301813149

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

100 mm

Weight

0.01 g

319.80 ZŁ with VAT / pcs + price for transport

260.00 ZŁ net + 23% VAT / pcs

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Parameters along with form of a neodymium magnet can be estimated using our modular calculator.

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SM 25x100 [2xM8] / N52 - magnetic separator

Specification/characteristics SM 25x100 [2xM8] / N52 - magnetic separator

properties

values

Cat. no.

130366

GTIN

5906301813149

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

25 mm [±0,1 mm]

Height

100 mm [±0,1 mm]

Weight

0.01 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N52

properties

values

units

coercivity bHc ?

860-995

kA/m

coercivity bHc ?

10.8-12.5

kOe

energy density [Min. - Max.] ?

380-422

BH max KJ/m

energy density [Min. - Max.] ?

48-53

BH max MGOe

remenance Br [Min. - Max.] ?

14.2-14.7

kGs

remenance Br [Min. - Max.] ?

1420-1470

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 magnetic separator, namely the magnetic roller, uses the power of neodymium magnets, placed in a casing made of stainless steel usually AISI304. In this way, it is possible to effectively separate 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 embedded magnet and its structure's pitch affect the range and strength of the separator's operation.

Generally speaking, magnetic separators are used to separate ferromagnetic elements. If the cans are made from ferromagnetic materials, the separator will be able to separate 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 the food industry to clear metallic contaminants, for example iron fragments or iron dust. Our rollers are made from acid-resistant steel, EN 1.4301, approved for use in food.

Magnetic rollers, otherwise magnetic separators, are used in food production, metal separation as well as recycling. They help in eliminating iron dust in the course of the process of separating metals from other wastes.

Our magnetic rollers are built with neodymium magnets placed in a tube made of stainless steel with a wall thickness of 1mm.

Both ends of the magnetic bar can be with M8 threaded openings, enabling simple mounting in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

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

Generally it is believed that the greater the magnet's power, the more efficient it is. However, the effectiveness 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 expected needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is more flat, the magnetic force lines will be short. Otherwise, when the magnet is thick, the force lines will be extended and extend over a greater distance.

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

In a saltwater environment, type AISI 316 steel is highly recommended thanks to its outstanding anti-corrosion properties.

Magnetic rollers stand out for their unique configuration of poles and their capability to attract magnetic substances directly onto their surface, as opposed to other separators that often use complex filtration systems.

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

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

Neodymium magnetic rollers offer many advantages, including 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.

To properly maintain of neodymium magnetic rollers, it is recommended regularly cleaning them from contaminants, avoiding extreme 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 rust and weaken. Magnetic field measurements is recommended be carried out every two years. Caution should be taken during use, 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 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, 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 as well as disadvantages of neodymium magnets NdFeB.

In addition to their exceptional field intensity, neodymium magnets offer the following advantages:

They retain their magnetic properties for nearly 10 years – the drop is just ~1% (in theory),
They remain magnetized despite exposure to magnetic noise,
Because of the brilliant layer of silver, the component looks high-end,
The outer field strength of the magnet shows remarkable magnetic properties,
Thanks to their enhanced temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
The ability for precise shaping as well as adjustment to individual needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which enhances their versatility in applications,
Key role in new technology industries – they find application in computer drives, rotating machines, clinical machines and sophisticated instruments,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in small dimensions, which allows for use in small systems

Disadvantages of rare earth magnets:

They are prone to breaking when subjected to a heavy impact. If the magnets are exposed to mechanical hits, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from fracture and enhances its overall resistance,
Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (influenced by the magnet’s profile). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
Due to corrosion risk in humid conditions, it is advisable to use sealed magnets made of protective material for outdoor use,
Limited ability to create threads in the magnet – the use of a mechanical support is recommended,
Possible threat from tiny pieces may arise, if ingested accidentally, which is notable in the protection of children. Furthermore, minuscule fragments from these assemblies have the potential to hinder health screening if inside the body,
Due to a complex production process, their cost is considerably higher,

Caution with Neodymium Magnets

Do not bring neodymium magnets close to GPS and smartphones.

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

Neodymium magnets can attract to each other, pinch the skin, and cause significant injuries.

Magnets will crack or crumble with careless joining to each other. You can't move them to each other. At a distance less than 10 cm you should have them very strongly.

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

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

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.

Neodymium magnetic are particularly delicate, resulting in damage.

Neodymium magnets are characterized by considerable fragility. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their strength can shock you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Magnets are not toys, children should not play with them.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

If you have a nickel allergy, avoid contact with neodymium magnets.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as 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.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. Once crushed into fine powder or dust, this material becomes highly flammable.

Neodymium magnets can become demagnetized at high temperatures.

Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

Safety rules!

Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.