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SM 32x100 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130296

GTIN: 5906301812890

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

100 mm

Weight

536 g

307.50 ZŁ with VAT / pcs + price for transport

250.00 ZŁ net + 23% VAT / pcs

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SM 32x100 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 32x100 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130296

GTIN

5906301812890

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

100 mm [±0,1 mm]

Weight

536 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 main mechanism of the magnetic separator is the use of neodymium magnets, placed in a casing made of stainless steel usually AISI304. As a result, it is possible to efficiently segregate ferromagnetic particles from other materials. A key aspect of its operation is the repulsion of magnetic poles N and S, which causes magnetic substances to be targeted. The thickness of the magnet and its structure's pitch determine the power and range of the separator's operation.

Generally speaking, magnetic separators serve to segregate ferromagnetic elements. If the cans are made of 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 find application in food production to clear metallic contaminants, for example iron fragments or iron dust. Our rods are constructed from durable acid-resistant steel, AISI 304, intended for use in food.

Magnetic rollers, often called cylindrical magnets, find application in food production, metal separation as well as waste processing. They help in extracting iron dust in the course of the process of separating metals from other wastes.

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

Both ends 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 differ in terms of flux density, magnetic force lines and the field of the magnetic field. We produce them in two materials, N42 as well as N52.

Often it is believed that the stronger the magnet, the more efficient it is. Nevertheless, the strength 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 use and anticipated needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is thin, the magnetic force lines are more compressed. By contrast, in the case of a thicker magnet, the force lines are longer and extend over a greater distance.

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

In a salt water environment, AISI 316 steel exhibits the best resistance due to its outstanding anti-corrosion properties.

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

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

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 near the magnetic pole. The result 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 many advantages, including excellent separation efficiency, strong magnetic field, 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, it’s worth cleaning after each use, avoiding temperatures above 80 degrees. The rollers feature waterproofing IP67, so if they are leaky, the magnets inside can oxidize and weaken. Testing of the rollers should be carried out once every 24 months. 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 cause 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.

Magnetic rollers are cylindrical neodymium magnets placed in a casing made of corrosion-resistant stainless steel, which are used to remove metal contaminants from bulk and granular 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.

Besides their durability, neodymium magnets are valued for these benefits:

They do not lose their power approximately ten years – the reduction of power is only ~1% (theoretically),
They are very resistant to demagnetization caused by external magnetic fields,
Because of the brilliant layer of silver, the component looks high-end,
The outer field strength of the magnet shows remarkable magnetic properties,
Neodymium magnets are known for very high magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the magnetic form),
The ability for accurate shaping or customization to custom needs – neodymium magnets can be manufactured in a wide range of shapes and sizes, which amplifies their functionality across industries,
Significant impact in advanced technical fields – they find application in HDDs, electromechanical systems, medical equipment and high-tech tools,
Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of neodymium magnets:

They may fracture when subjected to a strong impact. If the magnets are exposed to physical collisions, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time increases its overall strength,
Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible field weakening (influenced by the magnet’s dimensions). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
They rust in a humid environment. If exposed to rain, we recommend using moisture-resistant magnets, such as those made of non-metallic materials,
Limited ability to create threads in the magnet – the use of a magnetic holder is recommended,
Health risk related to magnet particles may arise, when consumed by mistake, which is significant in the health of young users. Additionally, small elements from these magnets can disrupt scanning once in the system,
Due to a complex production process, their cost is considerably higher,

Handle Neodymium Magnets with Caution

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

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional damage to the magnets.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets produce strong magnetic fields that can interfere 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 Magnets can attract to each other, pinch the skin, and cause significant injuries.

Magnets will bounce and also clash together within a distance of several to almost 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.

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.

Neodymium magnets produce intense magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

It is essential to keep neodymium magnets away from children.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Never bring neodymium magnets close to a phone and GPS.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Magnets made of neodymium are especially delicate, which leads to their breakage.

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. At the moment of connection between the magnets, tiny sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

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

Safety precautions!

To raise awareness of why neodymium magnets are so dangerous, see the article titled How dangerous are very powerful neodymium magnets?.