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SM 25x175 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130290

GTIN: 5906301812838

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

175 mm

Weight

0.01 g

467.40 ZŁ with VAT / pcs + price for transport

380.00 ZŁ net + 23% VAT / pcs

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SM 25x175 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 25x175 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130290

GTIN

5906301812838

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

25 mm [±0,1 mm]

Height

175 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 device roller magnetic is based on the use of neodymium magnets, which are welded in a casing made of stainless steel usually AISI304. As a result, it is possible to precisely remove ferromagnetic elements from the mixture. An important element of its operation is the use of repulsion of N and S poles of neodymium magnets, which causes 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 are designed to separate ferromagnetic elements. If the cans are ferromagnetic, 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 used in the food industry for the elimination of metallic contaminants, including iron fragments or iron dust. Our rods are constructed from acid-resistant steel, EN 1.4301, suitable for use in food.

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

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

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

In terms of forces, 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 and N52.

Usually it is believed that the greater the magnet's power, the more efficient it is. Nevertheless, 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 thin, the magnetic force lines will be short. By contrast, in the case of a thicker magnet, the force lines are longer and reach further.

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

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

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

Technical designations and terms pertaining to magnetic separators comprise amongst others magnet pitch, polarity, and magnetic induction, 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 close to the magnetic pole. The outcome is checked in a value table - the lowest is N30. All designations less than N27 or N25 suggest 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. However, some of the downsides may involve higher cost compared to other types of magnets and the need for regular maintenance.

For proper maintenance of neodymium magnetic rollers, you should they should be regularly cleaned, avoiding temperatures up to 80°C. The rollers feature waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and weaken. Testing of the rollers is recommended 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 metal separation is crucial.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from their superior holding force, neodymium magnets have these key benefits:

They have constant strength, and over more than ten years their performance decreases symbolically – ~1% (in testing),
They remain magnetized despite exposure to magnetic noise,
Because of the reflective layer of gold, the component looks high-end,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
Thanks to their high temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
With the option for tailored forming and precise design, these magnets can be produced in numerous shapes and sizes, greatly improving engineering flexibility,
Wide application in new technology industries – they are used in computer drives, electromechanical systems, clinical machines or even high-tech tools,
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 NdFeB magnets:

They can break when subjected to a heavy impact. If the magnets are exposed to physical collisions, they should be placed in a metal holder. The steel housing, in the form of a holder, protects the magnet from cracks and additionally increases its overall resistance,
High temperatures may significantly reduce the holding force of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on size). 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,
Magnets exposed to damp air can degrade. Therefore, for outdoor applications, we recommend waterproof types made of rubber,
The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is risky,
Potential hazard due to small fragments may arise, especially if swallowed, which is crucial in the context of child safety. Furthermore, minuscule fragments from these products may disrupt scanning if inside the body,
Due to expensive raw materials, their cost is above average,

Precautions

Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

Magnets will attract each other within a distance of several to around 10 cm from each other. Remember not to place fingers between magnets or in their path when they attract. Magnets, depending on their size, are able even cut off a finger or alternatively there can be a significant pressure 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 the most powerful, most remarkable magnets on the planet, and the surprising force between them can surprise you at first.

To handle magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

The magnet is coated with nickel - be careful 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.

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

The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Neodymium magnets can demagnetize 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.

Keep neodymium magnets away from 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 severe injuries, and even death.

Keep neodymium magnets away from 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 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 highly susceptible to damage, leading to breaking.

Neodymium magnetic are extremely delicate, and by joining them in an uncontrolled manner, they will crumble. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. At the moment of collision between the magnets, sharp metal fragments can be dispersed in different directions.

Caution!

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