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SM 25x325 [2xM8] / N52 - magnetic roller

magnetic separator

catalog number 130370

GTIN: 5906301813187

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diameter Ø

25 mm [±0,1 mm]

height

325 mm [±0,1 mm]

max. temperature

≤ 80 °C

984.00 PLN gross price (including VAT) / pcs +

800.00 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs

800.00 PLN

984.00 PLN

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760.00 PLN

934.80 PLN

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Do you have questions?

Call us tel: +48 22 499 98 98 or get in touch through form on our website. You can check the power as well as the appearance of magnet in our magnetic mass calculator magnetic calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: magnetic separator 25x325 [2xM8] / N52

Characteristics: magnetic separator 25x325 [2xM8] / N52

Properties

Values

catalog number

130370

GTIN

5906301813187

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

25 mm [±0,1 mm]

height

325 mm [±0,1 mm]

max. temperature ?

≤ 80 °C

weight

0.01 g

execution tolerance

± 0.1 mm

rodzaj materiału

AISI 304 - bezpieczna dla żywności

rodzaj magnesów

NdFeB N52

ilość gwintów

2x [M8] wewnętrzne

biegunowość

obwodowa - 12 nabiegunników

indukcja magnetyczna

~ 9 500 Gauss [±5%]

max. temp. pracy

poniżej ≤ 80°C

grubość rury osłonowej

1 mm

Magnetic properties of the material N52

material characteristics N52

Properties

Values

units

remenance Br [Min. - Max.] ?

14.2-14.7

kGs

remenance Br [Min. - Max.] ?

1420-1470

coercivity bHc ?

10.8-12.5

kOe

coercivity bHc ?

860-995

kA/m

actual internal force iHc

≥ 12

kOe

actual internal force iHc

≥ 955

kA/m

energy density [Min. - Max.]

48-53

BH max MGOe

energy density [Min. - Max.]

380-422

BH max KJ/m

max. temperature

≤ 80

°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B

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

The device roller magnetic is based on the use of neodymium magnets, which are welded in a casing made of stainless steel mostly AISI304. As a result, it is possible to precisely separate ferromagnetic elements from different substances. A key aspect of its operation is the repulsion of magnetic poles N and S, which allows magnetic substances to be targeted. The thickness of the magnet and its structure pitch affect the power and range of the separator's operation.

Generally speaking, magnetic separators are designed to segregate 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 separator will not be able to separate them.

Yes, magnetic rollers are employed in food production to clear metallic contaminants, including iron fragments or iron dust. Our rods are constructed from durable acid-resistant steel, AISI 304, intended for use in food.

Magnetic rollers, otherwise magnetic separators, find application in metal separation, food production 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 cylinder made of stainless steel with a wall thickness of 1mm.

From both sides of the magnetic bar will 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 features, 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.

Often it is believed that the greater the magnet's power, the more efficient it is. However, 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 application and specific needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is thin, the magnetic force lines will be short. On the other hand, when the magnet is thick, the force lines are extended and extend over a greater distance.

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

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

Magnetic bars are characterized by their specific arrangement of poles and their capability to attract magnetic substances directly onto their surface, in contrast to other separators that often use complex filtration systems.

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

Magnetic induction for a roller is measured 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 result is checked in a value table - the lowest is N30. All designations below 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. Disadvantages may include the need for regular cleaning, higher cost, and potential installation challenges.

To properly maintain of neodymium magnetic rollers, it is suggested to clean them regularly from deposits, avoid extreme temperatures up to 80°C, and cleaning after each use, avoiding temperatures up to 80°C. The rollers our rollers have an IP67 waterproof rating, so if they are not sealed, the magnets inside may rust and lose their strength. Magnetic field measurements are recommended to be conducted every two years. Caution should be exercised during use as there is a possibility of finger injury. If the protective tube is only 0.5 mm thick, it can wear out, which, in turn, may lead to issues with the magnetic rod becoming unsealed and product contamination. The effective operating range of the roller equals its diameter, fi25mm is approximately 25mm active range, while fi32 is about 40mm.

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Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

They do not lose strength over time - after 10 years, their strength decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic sources,
In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires an aesthetic appearance,
They exhibit very high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve high thermal resistance, allowing them to operate at temperatures up to 230°C and above...
Thanks to the flexibility in shaping and the ability to adapt to specific requirements – neodymium magnets can be produced in many variants of shapes and sizes, which amplifies their universality in usage.
Wide application in the industry of new technologies – find application in computer drives, electric motors, medical devices and very modern machines.

Disadvantages of neodymium magnets:

They are fragile when subjected to a powerful 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 strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the form 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 pose a threat, when accidentally ingested, which becomes significant in the context of children's health. It's also worth noting that miniscule components of these products are able to be problematic in medical diagnosis after entering the body.

Exercise Caution with Neodymium Magnets

Never bring neodymium magnets close to a phone and GPS.

Neodymium magnets generate strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

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.

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.

Neodymium magnets can demagnetize at high temperatures.

While Neodymium magnets can demagnetize 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.

Keep neodymium magnets away from 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.

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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnetic are incredibly fragile, they easily break as well as can become damaged.

Neodymium magnets are characterized by considerable fragility. 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.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

In the case of holding a finger in the path of a neodymium magnet, in such a case, a cut or even a fracture may occur.

Neodymium magnets are the strongest magnets ever created, and their power can surprise you.

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

It is essential to maintain neodymium magnets away from youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. 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.

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

SM 25x325 [2xM8] / N52 - magnetic roller

magnetic separator

Specification: magnetic separator 25x325 [2xM8] / N52

Magnetic properties of the material N52

Physical properties of sintered neodymium magnets Nd2Fe14B

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magnetic separator 32x175 [2xM8] / N42

Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B