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SM 32x475 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130377

GTIN: 5906301813255

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

475 mm

Weight

2545 g

1 414.50 ZŁ with VAT / pcs + price for transport

1 150.00 ZŁ net + 23% VAT / pcs

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SM 32x475 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 32x475 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130377

GTIN

5906301813255

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

475 mm [±0,1 mm]

Weight

2545 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 device roller magnetic is based on the use of neodymium magnets, placed in a casing made of stainless steel mostly AISI304. In this way, it is possible to precisely separate ferromagnetic elements from other materials. An important element of its operation is the use of repulsion of N and S poles of neodymium magnets, which allows magnetic substances to be targeted. The thickness of the magnet and its structure pitch affect the range and strength of the separator's operation.

Generally speaking, magnetic separators are designed to separate ferromagnetic elements. If the cans are made of ferromagnetic materials, the separator will effectively segregate 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 the food industry for the elimination of metallic contaminants, including iron fragments or iron dust. Our rollers are constructed from durable acid-resistant steel, AISI 304, suitable for use in food.

Magnetic rollers, otherwise cylindrical magnets, are used in food production, metal separation as well as waste processing. They help in extracting iron dust during the process of separating metals from other wastes.

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

From both sides of the magnetic bar will be with M8 threaded openings, allowing for 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 magnetic force lines, flux density and the area of operation of the magnetic field. We produce them in two materials, N42 as well as N52.

Usually it is believed that the greater the magnet's power, the more efficient it is. However, the value 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 specific 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 reach further.

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

In a salt water contact, AISI 316 steel is recommended thanks to its outstanding corrosion resistance.

Magnetic rollers are characterized by their unique configuration of poles and their ability to attract magnetic substances directly onto their surface, in contrast to other separators that may utilize 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, aiming to find 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 a range of benefits such as a very strong magnetic field, the ability to capture even the tiniest metal particles, and durability. However, some of the downsides may involve the requirement for frequent cleaning, greater weight, and potential installation difficulties.

To properly maintain of neodymium magnetic rollers, it is recommended washing after each use, avoiding temperatures above 80 degrees. The rollers feature waterproofing IP67, so if they are leaky, the magnets inside can rust and lose their power. Magnetic field measurements is recommended be carried out once every 24 months. Caution should be taken during use, as it’s possible of finger injury. 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.

A magnetic roller is a magnetic separator made from a neodymium magnet enclosed in a cylindrical stainless steel housing, which are used to remove metal contaminants from bulk and granular materials. They are used in the food industry, recycling, and plastic processing, where the removal of iron metals and iron filings is essential.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their remarkable magnetic power, neodymium magnets offer the following advantages:

They do not lose their even during nearly 10 years – the decrease of lifting capacity is only ~1% (theoretically),
They are extremely resistant to demagnetization caused by external magnetic fields,
Because of the lustrous layer of silver, the component looks aesthetically refined,
They have very high magnetic induction on the surface of the magnet,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
The ability for precise shaping or adjustment to custom needs – neodymium magnets can be manufactured in multiple variants of geometries, which extends the scope of their use cases,
Wide application in cutting-edge sectors – they are used in HDDs, rotating machines, clinical machines or even technologically developed systems,
Thanks to their power density, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of NdFeB magnets:

They are fragile when subjected to a strong impact. If the magnets are exposed to physical collisions, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage and reinforces its overall resistance,
Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (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,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of rubber for outdoor use,
Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing holes directly in the magnet,
Health risk from tiny pieces may arise, especially if swallowed, which is notable in the health of young users. It should also be noted that small elements from these assemblies may complicate medical imaging if inside the body,
Due to expensive raw materials, their cost is relatively high,

Breakaway strength of the magnet in ideal conditions – what it depends on?

The given strength of the magnet represents the optimal strength, determined in ideal conditions, that is:

with the use of low-carbon steel plate acting as a magnetic yoke
with a thickness of minimum 10 mm
with a smooth surface
with zero air gap
with vertical force applied
under standard ambient temperature

Determinants of lifting force in real conditions

Practical lifting force is dependent on elements, listed from the most critical to the less significant:

Air gap between the magnet and the plate, because 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 conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet’s surface and the plate decreases the load capacity.

Handle Neodymium Magnets Carefully

Keep neodymium magnets as far away as possible from GPS and smartphones.

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

Keep neodymium magnets away from 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 are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

If have a finger between or on the path of attracting magnets, there may be a large cut or a fracture.

Magnets made of neodymium are incredibly fragile, they easily break as well as can crumble.

Neodymium magnets are characterized by significant fragility. Neodymium magnets are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection 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 surprise you at first.

Familiarize yourself with our information to correctly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.

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

Strong magnetic fields emitted by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

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.

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.

Keep neodymium magnets away from youngest children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Be careful!

In order for you to know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.