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SM 32x225 [2xM8] / N52 - magnetic roller

magnetic separator

catalog number 130361

GTIN: 5906301813095

no reviews

diameter Ø

32 mm [±0,1 mm]

height

225 mm [±0,1 mm]

max. temperature

≤ 80 °C

676.50 ZŁ gross price (including VAT) / pcs +

550.00 ZŁ net price + 23% VAT / pcs

bulk discounts:

need more quantity?
price from 1 pcs
550.00 ZŁ
676.50 ZŁ
price from 4 pcs
522.50 ZŁ
642.67 ZŁ
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495.00 ZŁ
608.85 ZŁ

Don't know what to buy?

Give us a call tel: +48 888 99 98 98 or contact us through form on the contact page. You can check the power as well as the shape of neodymium magnets in our magnetic mass calculator force calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: magnetic separator 32x225 [2xM8] / N52

Characteristics: magnetic separator 32x225 [2xM8] / N52
Properties
Values
catalog number
130361
GTIN
5906301813095
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
32 mm [±0,1 mm]
height
225 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
1205.00 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N52
ilość gwintów
2x [M8] wewnętrzne
biegunowość
obwodowa - 8 nadbiegunników
indukcja magnetyczna
~ 8 000 Gauss [±5%]
max. temp. pracy
poniżej ≤ 80°C
grubość rury osłonowej
1 mm

Magnetic properties of the material N52

material characteristics N52
Properties
Values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
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.]
48-53
BH max MGOe
energy density [Min. - Max.]
380-422
BH max KJ/m
max. temperature
≤ 80
°C

Physical properties of sintered neodymium magnets Nd2Fe14B

Physical properties of sintered neodymium magnets Nd2Fe14B
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
The magnetic separator, namely the magnetic roller, uses the power of neodymium magnets, which are placed in a casing made of stainless steel mostly AISI304. In this way, it is possible to efficiently separate ferromagnetic particles from different substances. A fundamental component of its operation is the use of repulsion of N and S poles of neodymium magnets, which causes magnetic substances to be attracted. The thickness of the embedded magnet and its structure pitch affect the range and strength of the separator's operation.
Generally speaking, magnetic separators are used to separate ferromagnetic particles. 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 are used in food production for the elimination of metallic contaminants, for example iron fragments or iron dust. Our rods are made from durable acid-resistant steel, EN 1.4301, approved for contact with food.
Magnetic rollers, often called cylindrical magnets, are used 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 materials.
Our magnetic rollers are composed of a neodymium magnet placed in a stainless steel tube casing made of stainless steel with a wall thickness of 1mm.
From both sides of the magnetic bar will be with M8 threaded holes - 18 mm, which enables simple mounting in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.
In terms of magnetic properties, magnetic bars differ 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 more effective. Nevertheless, the value of the magnet's power is dependent 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 specific needs. The standard operating temperature of a magnetic bar is 80°C.
If the magnet is thin, the magnetic force lines are more compressed. By contrast, in the case of a thicker magnet, the force lines will be extended and reach further.
For making the casings of magnetic separators - rollers, usually stainless steel is employed, especially types AISI 304, AISI 316, and AISI 316L.
In a saltwater contact, type AISI 316 steel is highly recommended due to its excellent anti-corrosion properties.
Magnetic bars 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 may utilize complex filtration systems.
Technical designations and terms pertaining to magnetic separators comprise among others polarity, magnetic induction, magnet pitch, as well as the type of steel used.
Magnetic induction for a roller is measured 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 outcome is verified 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 many advantages, including a very strong magnetic field, the ability to capture even the tiniest metal particles, 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 is recommended 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 weaken. Magnetic field measurements is recommended be carried out every two years. Caution should be taken during use, as there is a risk 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.

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Advantages and disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

  • They do not lose power over time - after about 10 years, their strength decreases by only ~1% (theoretically),
  • They are highly resistant to demagnetization by external magnetic sources,
  • In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires an aesthetic appearance,
  • They exhibit extremely high magnetic induction on the surface of the magnet,
  • Magnetic neodymium magnets are characterized by very high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
  • Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in a wide range of shapes and sizes, which amplifies their universality in usage.
  • Wide application in the industry of new technologies – are utilized in computer drives, electric motors, medical devices or other modern machines.

Disadvantages of neodymium magnets:

  • They can break as they are fragile when subjected to a powerful impact. If the magnets are exposed to impacts, we recommend using magnets in a protective case. The steel housing in the form of a holder protects the magnet from impacts and also increases its overall strength,
  • High temperatures can reduce the power of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent reduction in strength (although it is dependent on the form and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
  • They rust in a humid environment. For outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
  • Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
  • Health risk associated with microscopic parts of magnets can be dangerous, when accidentally ingested, which is crucial in the context of child safety. Additionally, tiny parts of these devices can hinder the diagnostic process in case of swallowing.

Caution with Neodymium Magnets

The magnet is coated with nickel - be careful if you have an allergy.

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

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. Once crushed into fine powder or dust, this material becomes highly flammable.

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

The strong magnetic field generated by neodymium magnets 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. Remember not to place neodymium magnets close to these electronic devices.

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

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Keep neodymium magnets away from GPS and smartphones.

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

  Magnets are not toys, children should not play with them.

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.

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 even a fracture.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere 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 magnets can become demagnetized at high temperatures.

While Neodymium magnets can demagnetize at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

Magnets made of neodymium are extremely fragile, leading to breaking.

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

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