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SM 32x500 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130467

GTIN: 5906301813385

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

500 mm

Weight

2770 g

1562.10 ZŁ with VAT / pcs + price for transport

1270.00 ZŁ net + 23% VAT / pcs

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SM 32x500 [2xM8] / N52 - magnetic separator

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

Specification/characteristics SM 32x500 [2xM8] / N52 - magnetic separator

properties

values

Cat. no.

130467

GTIN

5906301813385

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

500 mm [±0,1 mm]

Weight

2770 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N52

properties

values

units

remenance Br [Min. - Max.] ?

14.2-14.7

kGs

remenance Br [Min. - Max.] ?

1420-1470

coercivity bHc ?

10.8-12.5

kOe

coercivity bHc ?

860-995

kA/m

actual internal force iHc

≥ 12

kOe

actual internal force iHc

≥ 955

kA/m

energy density [Min. - Max.] ?

48-53

BH max MGOe

energy density [Min. - Max.] ?

380-422

BH max KJ/m

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, which are embedded in a construction made of stainless steel usually AISI304. Due to this, it is possible to effectively segregate ferromagnetic particles from different substances. A key aspect of its operation is the use of repulsion of magnetic poles N and S, which enables magnetic substances to be collected. 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 used to extract ferromagnetic elements. If the cans are ferromagnetic, the separator will be able to separate them. 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 clear metallic contaminants, such as iron fragments or iron dust. Our rods are built from durable acid-resistant steel, EN 1.4301, intended for contact with food.

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

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

Both ends of the magnetic bar will be with M8 threaded holes - 18 mm, allowing for 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 magnetic force lines, flux density and the field of the magnetic field. We produce them in two 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 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.

In the case where the magnet is more flat, the magnetic force lines are more compressed. Otherwise, when the magnet is thick, the force lines will be longer and reach further.

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

In a saltwater environment, AISI 316 steel is highly recommended due to its exceptional corrosion resistance.

Magnetic rollers are characterized by their specific arrangement of poles and their capability to attract magnetic substances directly onto their surface, in contrast to other devices that often use more complicated 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 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 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 higher attracting power, longer lifespan, and effectiveness in separating fine metal particles. However, some of the downsides may involve higher cost compared to other types of magnets and the need for regular maintenance.

To properly maintain of neodymium magnetic rollers, it’s worth they should be regularly cleaned, avoiding temperatures above 80 degrees. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and lose their power. Testing of the rollers should 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 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.

Magnetic rollers are cylindrical neodymium magnets placed in a casing made of corrosion-resistant stainless steel, 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 as well as disadvantages of neodymium magnets NdFeB.

In addition to their pulling strength, neodymium magnets provide the following advantages:

They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
They are very resistant to demagnetization caused by external magnetic fields,
Thanks to the polished finish and gold coating, they have an visually attractive appearance,
They possess intense magnetic force measurable at the magnet’s surface,
These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to profile),
With the option for fine forming and precise design, these magnets can be produced in multiple shapes and sizes, greatly improving design adaptation,
Significant impact in new technology industries – they find application in HDDs, rotating machines, diagnostic apparatus or even other advanced devices,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of neodymium magnets:

They are fragile when subjected to a sudden impact. If the magnets are exposed to external force, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture while also enhances its overall resistance,
Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (influenced by the magnet’s profile). 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 encapsulated magnets, such as those made of non-metallic materials,
Limited ability to create internal holes in the magnet – the use of a external casing is recommended,
Potential hazard related to magnet particles may arise, when consumed by mistake, which is important in the context of child safety. Additionally, tiny components from these products might hinder health screening if inside the body,
Due to the price of neodymium, their cost is considerably higher,

Maximum lifting force for a neodymium magnet – what affects it?

The given lifting capacity of the magnet means the maximum lifting force, calculated under optimal conditions, specifically:

using a steel plate with low carbon content, acting as a magnetic circuit closure
of a thickness of at least 10 mm
with a refined outer layer
with zero air gap
with vertical force applied
in normal thermal conditions

What influences lifting capacity in practice

The lifting capacity of a magnet is influenced by in practice key elements, from primary to secondary:

Air gap between the magnet and the plate, as even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Moreover, even a small distance {between} the magnet and the plate lowers the lifting capacity.

Handle Neodymium Magnets with Caution

Keep neodymium magnets away 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 severe injuries, and even death.

Neodymium Magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant injuries.

In the situation of holding a finger in the path of a neodymium magnet, in that situation, a cut or even a fracture may occur.

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.

Under no circumstances should neodymium magnets be brought close to 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.

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.

Neodymium magnets are the most powerful magnets ever invented. Their strength 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.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Magnetic 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. You should especially avoid placing neodymium magnets near electronic devices.

Neodymium magnets can demagnetize at high temperatures.

Despite the general resilience of magnets, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

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. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

Neodymium magnetic are especially delicate, resulting in damage.

Neodymium magnetic are fragile as well as will shatter if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Be careful!

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