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Product available shipping tomorrow!

SM 25x300 [2xM8] / N52 - magnetic roller

magnetic separator

catalog number 130373

GTIN: 5906301813217

5.0

diameter Ø

25 mm [±0,1 mm]

height

300 mm [±0,1 mm]

max. temperature

≤ 80 °C

910.20 PLN gross price (including VAT) / pcs +

740.00 PLN net price + 23% VAT / pcs

bulk discounts:

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Specification: magnetic separator 25x300 [2xM8] / N52

Characteristics: magnetic separator 25x300 [2xM8] / N52
Properties
Values
catalog number
130373
GTIN
5906301813217
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
25 mm [±0,1 mm]
height
300 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
0.01 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N52
ilość gwintów
2x [M8] wewnętrzne
biegunowość
obwodowa - 11 nabiegunników
indukcja magnetyczna
~ 9 500 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 device rod magnetic is based on the use of neodymium magnets, which are placed in a construction made of stainless steel usually AISI304. In this way, it is possible to precisely separate ferromagnetic elements from other materials. An important element 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 magnet and its structure's pitch determine the power and range of the separator's operation.
Generally speaking, magnetic separators serve to separate ferromagnetic particles. If the cans are ferromagnetic, the separator will be able to separate 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 food production for the elimination of metallic contaminants, such as iron fragments or iron dust. Our rollers are constructed from durable acid-resistant steel, AISI 304, suitable for contact with food.
Magnetic rollers, otherwise magnetic separators, find application in metal separation, food production as well as recycling. They help in eliminating iron dust during the process of separating metals from other materials.
Our magnetic rollers are built with a neodymium magnet embedded 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 openings, enabling easy installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.
In terms of features, magnetic bars differ in terms of magnetic force lines, flux density and the area of operation of the magnetic field. We produce them in two materials, N42 and N52.
Often it is believed that the stronger the magnet, the more efficient it is. However, the strength 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 application and expected needs. The standard operating temperature of a magnetic bar is 80°C.
If the magnet is more flat, the magnetic force lines will be more compressed. Otherwise, in the case of a thicker magnet, the force lines will be extended and reach further.
For making the casings of magnetic separators - rollers, frequently stainless steel is utilized, especially types AISI 304, AISI 316, and AISI 316L.
In a saltwater contact, AISI 316 steel exhibits the best resistance thanks to its exceptional corrosion resistance.
Magnetic bars stand out for their specific arrangement of poles and their ability to attract magnetic particles 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 amongst others polarity, magnetic induction, magnet pitch, as well as the steel type applied.
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 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 a range of benefits such as higher attracting power, longer lifespan, and effectiveness in separating fine metal particles. 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 suggested {to clean them regularly from deposits, avoid extreme temperatures up to 80°C, and cleaning regularly, avoiding temperatures up to 80°C. The rollers our rollers have an IP67 waterproof rating, so if they are not sealed, the magnets inside may oxidize and weaken. Roller inspections are suggested to be conducted once every 24 months. Care should be taken 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 and disadvantages of neodymium magnets NdFeB.

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

  • They do not lose their power (of the magnet). After about 10 years, their power decreases by only ~1% (theoretically),
  • They are exceptionally resistant to demagnetization caused by an external magnetic field,
  • Thanks to the shiny finish and nickel, gold, or silver coating, they have 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...
  • The ability for precise shaping or customization to specific needs – neodymium magnets can be produced in various forms and dimensions, which expands the range of their possible uses.
  • Wide application in modern technologies – are used in HDD drives, electric motors, medical devices or other advanced devices.

Disadvantages of neodymium magnets:

  • They are prone to breaking as they are extremely fragile when subjected to a powerful impact. If the magnets are exposed to impacts, it is suggested 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 strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent reduction in strength (although it is dependent on the shape 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
  • Possible danger arising from small pieces of magnets can be dangerous, in case of ingestion, which is crucial in the context of children's health. It's also worth noting that miniscule components of these devices are able to hinder the diagnostic process in case of swallowing.

Handle with Care: Neodymium Magnets

You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.

Strong magnetic fields emitted by neodymium magnets can destroy 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 is coated with nickel. Therefore, exercise caution 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Magnets made of neodymium are incredibly fragile, they easily fall apart and can crumble.

Magnets made of neodymium are highly fragile, and by joining them in an uncontrolled manner, they will crumble. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their strength can surprise you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional damage to the magnets.

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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

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.

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 swellings.

Magnets may crack or crumble with careless connecting to each other. Remember not to move them to each other or have them firmly in hands at a distance less than 10 cm.

 Maintain neodymium magnets away from 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.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Neodymium magnets generate strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

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

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tel: +48 888 99 98 98