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SM 19x225 [2xM6] / N50 - magnetic separator

magnetic separator

Catalog no 130241

GTIN: 5906301812708

5

Diameter Ø [±0,1 mm]

19 mm

Height [±0,1 mm]

225 mm

Weight

0.01 g

492.00 with VAT / pcs + price for transport

400.00 ZŁ net + 23% VAT / pcs

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SM 19x225 [2xM6] / N50 - magnetic separator

Specification/characteristics SM 19x225 [2xM6] / N50 - magnetic separator
properties
values
Cat. no.
130241
GTIN
5906301812708
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
19 mm [±0,1 mm]
Height
225 mm [±0,1 mm]
Weight
0.01 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N50

properties
values
units
remenance Br [Min. - Max.] ?
14-14.6
kGs
remenance Br [Min. - Max.] ?
1400-1460
T
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.] ?
47-51
BH max MGOe
energy density [Min. - Max.] ?
374-406
BH max KJ/m
max. temperature ?
≤ 80
°C

Physical properties of NdFeB

properties
values
units
Vickers hardness
≥550
Hv
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

Shopping tips

The main mechanism of the magnetic separator is the use of neodymium magnets, which are placed in a casing made of stainless steel mostly AISI304. In this way, it is possible to effectively separate ferromagnetic elements from the mixture. A fundamental component 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 determine the range and strength of the separator's operation.
Generally speaking, magnetic separators are used to separate ferromagnetic particles. 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 remove metallic contaminants, such as iron fragments or iron dust. Our rods are built from acid-resistant steel, AISI 304, intended for use in food.
Magnetic rollers, often called magnetic separators, are used in metal separation, food production as well as recycling. They help in eliminating iron dust in the course of the process of separating metals from other materials.
Our magnetic rollers are composed of a neodymium magnet anchored in a stainless steel tube cylinder of stainless steel with a wall thickness of 1mm.
Both ends of the magnetic bar can be with M8 threaded holes - 18 mm, which enables easy 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 magnetic force lines, flux density and the field of the magnetic field. We produce them in two materials, N42 and N52.
Usually it is believed that the greater the magnet's power, 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 application and specific needs. The standard operating temperature of a magnetic bar is 80°C.
If the magnet is more flat, the magnetic force lines will be short. By contrast, in the case of a thicker magnet, the force lines will be extended and reach further.
For creating the casings of magnetic separators - rollers, usually stainless steel is employed, especially types AISI 304, AISI 316, and AISI 316L.
In a saltwater contact, AISI 316 steel is highly recommended due to its exceptional corrosion resistance.
Magnetic bars are characterized by their specific arrangement of poles and their ability 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 roller is determined using a teslameter or a gaussmeter with a flat Hall-effect probe, seeking 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 doesn't meet the standard - they are not suitable.
Neodymium magnetic bars 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.
To properly maintain of neodymium magnetic rollers, you should regularly cleaning them from deposits, avoiding extreme temperatures above 80 degrees, and protecting them from moisture if the threads are not sealed – in ours, they are. The rollers our rollers have 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 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, 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 stability, neodymium magnets are valued for these benefits:

  • They retain their full power for around 10 years – the loss is just ~1% (in theory),
  • They remain magnetized despite exposure to magnetic noise,
  • The use of a mirror-like silver surface provides a smooth finish,
  • They have exceptional magnetic induction on the surface of the magnet,
  • Thanks to their high temperature resistance, they can operate (depending on the geometry) 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 different geometries, which expands their functional possibilities,
  • Important function in modern technologies – they are used in hard drives, electric drives, medical equipment along with sophisticated instruments,
  • Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in compact dimensions, which makes them useful in miniature devices

Disadvantages of neodymium magnets:

  • They can break when subjected to a heavy impact. If the magnets are exposed to shocks, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage while also increases its overall durability,
  • They lose strength at extreme temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the dimensions and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • They rust in a wet environment. For outdoor use, we recommend using encapsulated magnets, such as those made of non-metallic materials,
  • Limited ability to create threads in the magnet – the use of a housing is recommended,
  • Health risk from tiny pieces may arise, especially if swallowed, which is significant in the family environments. Additionally, miniature parts from these products may disrupt scanning once in the system,
  • In cases of tight budgets, neodymium magnet cost may not be economically viable,

Best holding force of the magnet in ideal parameterswhat it depends on?

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

  • with mild steel, serving as a magnetic flux conductor
  • with a thickness of minimum 10 mm
  • with a smooth surface
  • in conditions of no clearance
  • in a perpendicular direction of force
  • in normal thermal conditions

Magnet lifting force in use – key factors

Practical lifting force is determined by 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) can cause 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 was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a slight gap {between} the magnet and the plate reduces the load capacity.

Exercise Caution with Neodymium Magnets

Never bring neodymium magnets close to a phone and GPS.

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

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.

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

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

Neodymium magnets can demagnetize at high temperatures.

Although magnets are generally resilient, 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 among the most powerful magnets on Earth. The astonishing force they generate between each other can shock you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.

Neodymium magnets are particularly fragile, resulting in shattering.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. 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.

If you have a nickel allergy, avoid contact with neodymium magnets.

Studies show a small percentage of people have allergies to certain metals, including 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.

 Keep neodymium magnets far from youngest children.

Neodymium magnets are not toys. Do not allow children to play 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.

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

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

Be careful!

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

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98