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neodymium magnets

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SM 32x375 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130379

GTIN: 5906301813279

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diameter Ø

32 mm [±0,1 mm]

height

375 mm [±0,1 mm]

max. temperature

≤ 80 °C

1119.30 PLN gross price (including VAT) / pcs +

910.00 PLN net price + 23% VAT / pcs

bulk discounts:

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Call us tel: +48 888 99 98 98 or get in touch via form on our website. You can check the power and the shape of neodymium magnet in our magnetic calculator force calculator

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

Specification: magnetic separator 32x375 [2xM8] / N42

Characteristics: magnetic separator 32x375 [2xM8] / N42
Properties
Values
catalog number
130379
GTIN
5906301813279
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
32 mm [±0,1 mm]
height
375 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
2010.00 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N42
ilość gwintów
2x [M8] wewnętrzne
biegunowość
obwodowa - 14 nadbiegunników
indukcja magnetyczna
~ 8 000 Gauss [±5%]
max. temp. pracy
poniżej ≤ 80°C
grubość rury osłonowej
1 mm

Magnetic properties of the material N42

material characteristics N42
Properties
Values
units
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
T
coercivity bHc ?
10.8-12.0
kOe
coercivity bHc ?
860-955
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.]
40-42
BH max MGOe
energy density [Min. - Max.]
318-334
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 device rod magnetic is based on the use of neodymium magnets, which are embedded in a casing made of stainless steel mostly AISI304. As a result, it is possible to precisely remove ferromagnetic particles from different substances. A key aspect of its operation is the repulsion of N and S poles of neodymium magnets, which allows magnetic substances to be collected. The thickness of the embedded magnet and its structure's pitch affect the power and range of the separator's operation.
Generally speaking, magnetic separators are used to separate ferromagnetic elements. If the cans are made from 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 effectively segregate them.
Yes, magnetic rollers are employed in the food sector to remove metallic contaminants, including iron fragments or iron dust. Our rods are constructed 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 eliminating iron dust in the course of the process of separating metals from other materials.
Our magnetic rollers are built with neodymium magnets placed in a stainless steel tube casing of stainless steel with a wall thickness of 1mm.
Both ends of the magnetic bar can be with M8 threaded openings, which enables quick 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 flux density, magnetic force lines and the area of operation of the magnetic field. We produce them in materials, N42 as well as N52.
Often it is believed that the stronger the magnet, the better. However, 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.
In the case where the magnet is more flat, the magnetic force lines are short. By contrast, when the magnet is thick, the force lines are extended and reach further.
For making the casings of magnetic separators - rollers, most often stainless steel is employed, especially types AISI 304, AISI 316, and AISI 316L.
In a salt water environment, type AISI 316 steel is highly recommended due to its excellent anti-corrosion properties.
Magnetic rollers stand out for their unique configuration of poles and their capability 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 comprise among others magnet pitch, polarity, and magnetic induction, as well as the type of steel used.
Magnetic induction for a magnet on a roller is measured 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 indicate recycling that falls below the standard - they are not suitable.
Neodymium magnetic bars offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. 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 is recommended {to clean them regularly from deposits, avoid extremal temperatures up to 80°C, and to clean them regularly, avoiding temperatures up to 80°C. The rollers have an IP67 waterproof rating, so if they are not sealed, the magnets inside may rust and weaken. Roller inspections are advised to be conducted once every 24 months. Caution should be exercised during use as there is a risk of finger injury. If the protective tube is only 0.5 mm thick, it can wear out, which, in turn, may lead to issues with the magnetic rod becoming unsealed and product contamination. The effective operating range of the roller equals its diameter, fi25mm is approximately 25mm active range, while fi32 is about 40mm.

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Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

  • They do not lose strength over time - after about 10 years, their power decreases by only ~1% (theoretically),
  • They are highly resistant to demagnetization by external magnetic sources,
  • By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
  • They possess very high magnetic induction on the surface of the magnet,
  • Thanks to their high temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C and above...
  • 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 enhances their versatility in applications.
  • Wide application in the industry of new technologies – find application in computer drives, electric drive mechanisms, medical devices or very advanced devices.

Disadvantages of neodymium magnets:

  • They can break when subjected to a powerful impact. If the magnets are exposed to impacts, we recommend using magnets in a metal holder. The steel housing in the form of a holder protects the magnet from impacts, and at the same time increases its overall strength,
  • They lose strength at high temperatures. Most neodymium magnets experience permanent loss of strength when heated above 80°C (depending on the shape and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
  • Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we suggest using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
  • The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
  • Health risk associated with microscopic parts of magnets are risky, when accidentally ingested, which is particularly important in the aspect of protecting young children. Furthermore, tiny parts of these devices are able to be problematic in medical diagnosis when they are in the body.

Handle Neodymium Magnets with Caution

 Maintain neodymium magnets far from 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.

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.

Neodymium magnetic are particularly delicate, resulting in shattering.

Neodymium magnets are fragile as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets are over 10 times more powerful than ferrite magnets (the ones in speakers), and their power 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.

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

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.

Keep neodymium magnets away from 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.

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.

Do not place neodymium magnets 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. Avoid placing neodymium magnets in close proximity to electronic devices.

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.

Magnets will attract each other within a distance of several to about 10 cm from each other. Don't put your fingers in the path of magnet attraction, because a serious injury may occur. Depending on how massive the neodymium magnets are, they can lead to a cut or a fracture.

Neodymium magnets can become demagnetized 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.

Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98