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SM 32x200 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130360

GTIN: 5906301813088

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

200 mm

Weight

1100 g

676.50 ZŁ with VAT / pcs + price for transport

550.00 ZŁ net + 23% VAT / pcs

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SM 32x200 [2xM8] / N52 - magnetic separator

Specification/characteristics SM 32x200 [2xM8] / N52 - magnetic separator

properties

values

Cat. no.

130360

GTIN

5906301813088

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

200 mm [±0,1 mm]

Weight

1100 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N52

properties

values

units

coercivity bHc ?

860-995

kA/m

coercivity bHc ?

10.8-12.5

kOe

energy density [Min. - Max.] ?

380-422

BH max KJ/m

energy density [Min. - Max.] ?

48-53

BH max MGOe

remenance Br [Min. - Max.] ?

14.2-14.7

kGs

remenance Br [Min. - Max.] ?

1420-1470

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, placed in a construction made of stainless steel usually AISI304. In this way, it is possible to effectively remove ferromagnetic particles from other materials. An important element of its operation is the repulsion of magnetic poles N and S, which causes magnetic substances to be attracted. 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 segregate ferromagnetic elements. If the cans are ferromagnetic, the separator will effectively segregate 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 industry to remove metallic contaminants, for example iron fragments or iron dust. Our rods are constructed from acid-resistant steel, AISI 304, approved for contact with food.

Magnetic rollers, often called cylindrical magnets, are employed in metal separation, food production as well as recycling. They help in eliminating iron dust during the process of separating metals from other wastes.

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

Both ends of the magnetic bar can be with M8 threaded openings, which enables easy installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of magnetic properties, 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 as well as N52.

Usually it is believed that the stronger the magnet, the better. 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 application and anticipated needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is thin, the magnetic force lines are short. Otherwise, when the magnet is thick, the force lines are extended and extend over a greater distance.

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

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

Magnetic rollers are characterized by their specific arrangement of poles and their ability to attract magnetic particles 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 steel type applied.

Magnetic induction for a roller is determined 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 result is verified in a value table - the lowest is N30. All designations below N27 or N25 indicate recycling that doesn't meet the standard - they are not suitable.

Neodymium magnetic rollers offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. On the other hand, among the drawbacks, one can mention the need for regular cleaning, higher cost, and potential installation challenges.

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 leaky, the magnets inside can oxidize and weaken. Magnetic field measurements should be carried out once every 24 months. Care should be taken, as it’s possible 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 is equal 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 used in the food industry, recycling, and plastic processing, where metal separation is crucial.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their immense pulling force, neodymium magnets offer the following advantages:

They do not lose their even during around ten years – the decrease of power is only ~1% (according to tests),
They remain magnetized despite exposure to strong external fields,
Because of the reflective layer of nickel, the component looks aesthetically refined,
They possess strong magnetic force measurable at the magnet’s surface,
Thanks to their exceptional temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
Thanks to the possibility in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in various configurations, which expands their application range,
Significant impact in advanced technical fields – they are used in data storage devices, electromechanical systems, diagnostic apparatus or even other advanced devices,
Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of NdFeB magnets:

They can break when subjected to a strong impact. If the magnets are exposed to shocks, it is suggested to place them in a metal holder. The steel housing, in the form of a holder, protects the magnet from breakage while also increases its overall strength,
Magnets lose pulling force 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 wet environment. If exposed to rain, we recommend using encapsulated magnets, such as those made of plastic,
Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing fine shapes directly in the magnet,
Possible threat from tiny pieces may arise, especially if swallowed, which is notable in the health of young users. Moreover, tiny components from these devices may interfere with diagnostics if inside the body,
Due to the price of neodymium, their cost is relatively high,

Maximum magnetic pulling force – what affects it?

The given lifting capacity of the magnet corresponds to the maximum lifting force, assessed in ideal conditions, that is:

with mild steel, serving as a magnetic flux conductor
with a thickness of minimum 10 mm
with a polished side
with no separation
under perpendicular detachment force
in normal thermal conditions

Magnet lifting force in use – key factors

Practical lifting force is determined by elements, by priority:

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.

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.

Exercise Caution with Neodymium Magnets

Magnets made of neodymium are known for being fragile, which can cause them to crumble.

Magnets made of neodymium are highly fragile, and by joining them in an uncontrolled manner, they will crack. 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.

Neodymium magnets are the strongest, most remarkable magnets on the planet, and the surprising force between them can shock you at first.

To use 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.

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

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

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.

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

Neodymium magnets jump and also clash mutually within a distance of several to around 10 cm from each other.

The magnet is coated with nickel. Therefore, exercise caution 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Keep neodymium magnets away from youngest children.

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.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

Avoid bringing neodymium magnets close to a phone or 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.

Pay attention!

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