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Product available shipping tomorrow!

SM 32x275 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130376

GTIN: 5906301813248

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diameter Ø

32 mm [±0,1 mm]

height

275 mm [±0,1 mm]

max. temperature

≤ 80 °C

824.10 PLN gross price (including VAT) / pcs +

670.00 PLN net price + 23% VAT / pcs

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Want to talk about magnets?

Call us tel: +48 22 499 98 98 or write through contact form on the contact page. You can check the lifting capacity and the appearance of neodymium magnet in our force calculator power calculator

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

Specification: magnetic separator 32x275 [2xM8] / N42

Characteristics: magnetic separator 32x275 [2xM8] / N42

Properties

Values

catalog number

130376

GTIN

5906301813248

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

32 mm [±0,1 mm]

height

275 mm [±0,1 mm]

max. temperature ?

≤ 80 °C

weight

1475.00 g

execution tolerance

± 0.1 mm

rodzaj materiału

AISI 304 - bezpieczna dla żywności

rodzaj magnesów

NdFeB N42

ilość gwintów

2x [M8] wewnętrzne

biegunowość

obwodowa - 10 nadbiegunników

indukcja magnetyczna

~ 8 000 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 magnetic separator, namely the magnetic roller, uses the power of neodymium magnets, which are embedded in a casing made of stainless steel usually AISI304. As a result, it is possible to precisely remove ferromagnetic particles from other materials. An important element of its operation is the repulsion of N and S poles of neodymium magnets, which causes magnetic substances to be attracted. The thickness of the magnet and its structure's pitch determine the range and strength of the separator's operation.

Generally speaking, magnetic separators are used to extract 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 food production to clear metallic contaminants, for example iron fragments or iron dust. Our rollers are constructed from acid-resistant steel, EN 1.4301, approved for contact with food.

Magnetic rollers, otherwise cylindrical magnets, are employed 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 materials.

Our magnetic rollers are built with neodymium magnets anchored 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 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 materials, N42 and N52.

Often it is believed that the greater the magnet's power, the better. Nevertheless, 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.

In the case where 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 longer and reach further.

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

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

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

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

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 outcome is checked 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 a range of benefits such as a very strong magnetic field, the ability to capture even the tiniest metal particles, and durability. Disadvantages may include 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 extremal temperatures up to 80°C, and protect them from moisture if the threads are not sealed - in our case. The rollers have an IP67 waterproof rating, so if they are not sealed, the magnets inside may oxidize and lose their strength. Roller inspections are recommended to be conducted once every 24 months. Care should be taken as there is a risk of finger injury. If the protective tube is only 0.5 mm thick, it can wear out, which, in turn, can result in issues with the magnetic rod becoming unsealed and product contamination. The Roller operating range equals its diameter, fi25mm is approximately 25mm active range, while fi32 is about 40mm.

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magnetic separator 32x350 [2xM8] / N52

1119.30 PLN / pcs

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magnetic separator with handle 25x200 / N52

553.50 PLN / pcs

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magnetic separator with handle 25x125 / N52

369.00 PLN / pcs

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense strength, 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 protect against demagnetization caused by external magnetic sources extremely well,
In other words, thanks to the glossy nickel, gold, or silver finish, the element gains an aesthetic appearance,
They have very 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 form) even at temperatures of 230°C or higher...
The ability for precise shaping and customization to specific needs – neodymium magnets can be produced in various forms and dimensions, which enhances their versatility in applications.
Wide application in the industry of new technologies – are used in computer drives, electric motors, medical equipment and various technologically advanced devices.

Disadvantages of neodymium magnets:

They are prone to breaking as they are extremely fragile when subjected to a strong impact. If the magnets are exposed to impacts, it is suggested using magnets in a protective case. The steel housing in the form of a holder protects the magnet from impacts and also increases its overall strength,
They lose strength at high temperatures. Most neodymium magnets experience permanent loss of strength when heated above 80°C (depending on the form and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we suggest using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
The use of a cover - a magnetic holder is recommended due to the limited production capabilities of creating threads or complex shapes in the magnet
Possible danger associated with microscopic parts of magnets can be dangerous, in case of ingestion, which is crucial in the aspect of protecting young children. Furthermore, miniscule components of these devices have the potential to complicate diagnosis after entering the body.

Safety Precautions

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

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. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their power can surprise 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.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets can demagnetize at high temperatures.

Under specific conditions, Neodymium magnets can lose their magnetism when subjected to high temperatures.

The magnet coating contains nickel, so be cautious if you have a nickel 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.

Magnets made of neodymium are delicate as well as can easily crack and shatter.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Dust and powder from neodymium magnets are 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.

Do not bring neodymium magnets close to GPS and smartphones.

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.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

If joining of neodymium magnets is not controlled, then they may crumble and crack. You can't approach them to each other. At a distance less than 10 cm you should hold them very firmly.

Maintain neodymium magnets away from youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are powerful neodymium magnets?.

SM 32x275 [2xM8] / N42 - magnetic roller

magnetic separator

Specification: magnetic separator 32x275 [2xM8] / N42

Magnetic properties of the material N42

Physical properties of sintered neodymium magnets Nd2Fe14B

Product suggestions

magnetic holder internal thread 32x18x8 [M6] GW / N38

magnetic separator 32x350 [2xM8] / N52

magnetic separator with handle 25x200 / N52

magnetic separator with handle 25x125 / N52

Advantages as well as disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B