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SM 18x200 [2xM5] / N42 - magnetic roller

magnetic separator

catalog number 130273

GTIN: 5906301812753

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diameter Ø

18 mm [±0,1 mm]

height

200 mm [±0,1 mm]

max. temperature

≤ 80 °C

442.80 PLN gross price (including VAT) / pcs +

360.00 PLN net price + 23% VAT / pcs

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Specification: magnetic separator 18x200 [2xM5] / N42

Characteristics: magnetic separator 18x200 [2xM5] / N42

Properties

Values

catalog number

130273

GTIN

5906301812753

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

18 mm [±0,1 mm]

height

200 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 [M5] wewnętrzne

biegunowość

obwodowa - 9 nabiegunników

indukcja magnetyczna

~ 5 400 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, which are placed in a casing made of stainless steel usually AISI304. As a result, it is possible to efficiently segregate ferromagnetic particles from the mixture. A key aspect of its operation is the repulsion of magnetic poles N and S, which enables 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 used to segregate ferromagnetic particles. 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 separator will not be able to separate them.

Yes, magnetic rollers find application in the food sector for the elimination of metallic contaminants, including iron fragments or iron dust. Our rods are built from durable acid-resistant steel, EN 1.4301, intended for use in food.

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

Our magnetic rollers consist of neodymium magnets embedded in a stainless steel tube cylinder of stainless steel with a wall thickness of 1mm.

Both ends of the magnetic bar will be with M8 threaded holes - 18 mm, which enables simple mounting 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 flux density, magnetic force lines and the area of operation 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 effective. But, 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 more flat, the magnetic force lines are short. By contrast, in the case of a thicker magnet, the force lines will be extended and extend over a greater distance.

For constructing the casings of magnetic separators - rollers, frequently stainless steel is employed, particularly types AISI 304, AISI 316, and AISI 316L.

In a salt water environment, type AISI 316 steel exhibits the best resistance thanks to its outstanding corrosion resistance.

Magnetic bars are characterized by their unique configuration of poles and their ability to attract magnetic particles directly onto their surface, in contrast to other separators that often use more complicated filtration systems.

Technical designations and terms pertaining to magnetic separators comprise amongst others polarity, magnetic induction, magnet pitch, 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, seeking the highest magnetic field value near the magnetic pole. The result is verified in a value table - the lowest is N30. All designations less than N27 or N25 indicate recycling that falls below the standard - they are not suitable.

Neodymium magnetic rollers offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. However, some of the downsides may involve the requirement for frequent cleaning, greater weight, and potential installation difficulties.

For proper maintenance of neodymium magnetic rollers, it is advised {to clean them regularly from deposits, avoid extreme temperatures above 80 degrees, and protect them from moisture if the threads are not sealed - in our case. The rollers our rollers have an IP67 waterproof rating, so if they are not watertight, 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.

In addition to immense strength, neodymium magnets have the following advantages:

They do not lose their power (of the magnet). After approximately 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 nickel, gold, or silver finish, the element gains an visually attractive appearance,
They have exceptionally high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve significant thermal resistance, allowing them to operate at temperatures up to 230°C and above...
The ability for precise shaping and customization to specific needs – neodymium magnets can be produced in various forms and dimensions, which expands the range of their possible uses.
Key role in modern technologies – are utilized in hard drives, electric drive mechanisms, medical equipment and various technologically 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 power of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the shape 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 associated with microscopic parts of magnets are risky, when accidentally ingested, which is crucial in the context of children's health. Additionally, tiny parts of these devices have the potential to hinder the diagnostic process in case of swallowing.

Precautions

Neodymium magnets can demagnetize at high temperatures.

In certain circumstances, Neodymium magnets can lose their magnetism when subjected to high temperatures.

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.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their power 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.

Do not give neodymium magnets to children.

Remember that neodymium magnets are not toys. Do not allow children to play 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.

Magnets made of neodymium are noted for their fragility, which can cause them to shatter.

Neodymium magnets are characterized by significant 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 collision between the magnets, small metal fragments can be dispersed in different directions.

Keep neodymium magnets away from 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.

The magnet coating is made of nickel, so be cautious 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they 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.

You should maintain neodymium magnets at a safe distance from the wallet, computer, and TV.

Strong 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 attract to each other, pinch the skin, and cause significant swellings.

Magnets may crack or crumble with careless connecting to each other. You can't approach them to each other. At a distance less than 10 cm you should hold them extremely strongly.

To illustrate why neodymium magnets are so dangerous, see the article - How dangerous are powerful neodymium magnets?.

SM 18x200 [2xM5] / N42 - magnetic roller

magnetic separator

Specification: magnetic separator 18x200 [2xM5] / N42

Magnetic properties of the material N42

Physical properties of sintered neodymium magnets Nd2Fe14B

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ring magnet 40x22x10 / N38 ↑ axial

ring magnet 20x8/4x5 / N38 ↑ axial

magnetic holder internal thread 60x30x15 [M10] GW / N38

weapon holder 100x38x13 / N52 ↑ axial

Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B