Effective, powerful magnetic roller SM 25x300 [2xM8] / N42

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SM 25x300 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130295

GTIN: 5906301812883

5.0

diameter Ø

25 mm [±0,1 mm]

height

300 mm [±0,1 mm]

max. temperature

≤ 80 °C

836.40 ZŁ gross price (including VAT) / pcs +

680.00 ZŁ net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs

680.00 ZŁ

836.40 ZŁ

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Give us a call tel: +48 888 99 98 98 or write via contact form on the contact page. You can check the power as well as the shape of neodymium magnet in our magnetic calculator magnetic calculator

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Specification: magnetic separator 25x300 [2xM8] / N42

Characteristics: magnetic separator 25x300 [2xM8] / N42

Properties

Values

catalog number

130295

GTIN

5906301812883

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

25 mm [±0,1 mm]

height

300 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 N42

ilość gwintów

2x [M8] wewnętrzne

biegunowość

obwodowa - 11 nabiegunników

indukcja magnetyczna

~ 6 500 Gauss [±5%]

max. temp. pracy

poniżej ≤ 80°C

grubość rury osłonowej

1 mm

Magnetic properties of the material N42

material characteristics N42

Properties

Values

units

remenance Br [Min. - Max.] ?

12.9-13.2

kGs

remenance Br [Min. - Max.] ?

1290-1320

coercivity bHc ?

10.8-12.0

kOe

coercivity bHc ?

860-955

kA/m

actual internal force iHc

≥ 12

kOe

actual internal force iHc

≥ 955

kA/m

energy density [Min. - Max.]

40-42

BH max MGOe

energy density [Min. - Max.]

318-334

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 main mechanism of the magnetic separator is the use of neodymium magnets, placed in a casing made of stainless steel usually AISI304. In this way, it is possible to efficiently remove ferromagnetic particles from the mixture. A fundamental component of its operation is the repulsion of N and S poles of neodymium magnets, 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 are designed 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 magnetic separator will not be effective.

Yes, magnetic rollers are employed in the food sector to remove metallic contaminants, for example iron fragments or iron dust. Our rods are made from acid-resistant steel, AISI 304, suitable for use in food.

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

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

From both sides of the magnetic bar can be with M8 threaded holes - 18 mm, enabling easy installation 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.

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

If the magnet is more flat, the magnetic force lines are more compressed. By contrast, in the case of a thicker magnet, the force lines will be extended and reach further.

For making the casings of magnetic separators - rollers, usually stainless steel is used, especially types AISI 304, AISI 316, and AISI 316L.

In a saltwater environment, type AISI 316 steel exhibits the best resistance thanks to its exceptional anti-corrosion properties.

Magnetic bars are characterized by their unique configuration of poles and their capability to attract magnetic substances directly onto their surface, in contrast to other devices that may utilize complex filtration systems.

Technical designations and terms pertaining to magnetic separators comprise among 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, 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 falls below the standard - they are not suitable.

Neodymium magnetic rollers 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 the requirement for frequent cleaning, greater weight, and potential installation difficulties.

For proper maintenance of neodymium magnetic rollers, it is recommended regularly cleaning them from deposits, avoiding high temperatures above 80 degrees, and shielding them from moisture if the threads are not sealed – in ours, they are. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and lose their power. Magnetic field measurements should be carried out once every 24 months. Caution should be taken during use, 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 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 used in the food industry, recycling, and plastic processing, where the removal of iron metals and iron filings is essential.

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Advantages as well as disadvantages of neodymium magnets NdFeB.

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

They do not lose their strength (of the magnet). After approximately 10 years, their power decreases by only ~1% (theoretically),
They are exceptionally resistant to demagnetization caused by an external magnetic field,
In other words, thanks to the shiny nickel, gold, or silver finish, the element gains an aesthetic appearance,
They have exceptionally high magnetic induction on the surface of the magnet,
Magnetic neodymium magnets are characterized by very high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
The ability for precise shaping or customization to specific needs – neodymium magnets can be produced in many variants of shapes and sizes, which enhances their versatility in applications.
Key role in advanced technologically fields – are used in hard drives, electric drive mechanisms, medical devices and other advanced devices.

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 metal holder. 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,
Due to their susceptibility to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
Possible danger associated with microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting young children. It's also worth noting that small elements of these magnets can be problematic in medical diagnosis in case of swallowing.

Exercise Caution with Neodymium Magnets

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

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

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

Neodymium magnets can demagnetize 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.

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

Neodymium magnets generate strong magnetic fields that can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Never bring neodymium magnets close to a phone and GPS.

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

It is essential to maintain neodymium magnets out of reach from youngest children.

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

Neodymium magnetic are highly susceptible to damage, leading to shattering.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. 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.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

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.

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 is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Neodymium magnets are the strongest magnets ever invented. Their strength can shock you.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

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

SM 25x300 [2xM8] / N42 - magnetic roller

magnetic separator

Specification: magnetic separator 25x300 [2xM8] / N42

Magnetic properties of the material N42

Physical properties of sintered neodymium magnets Nd2Fe14B

List recommended items

magnetic separator with handle 25x175 / N52

cylindrical magnet 70x20 / N38 ↑ axial

search holder 94x40 [3xM10] GW F550 Silver Black Lina / N52 ↑ axial

neocube NeoCube 5 mm kwadraty / N38 ↑ axial

Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B