e-mail: bok@dhit.pl

neodymium magnets

We offer blue color magnetic Nd2Fe14B - our offer. Practically all magnesy neodymowe on our website are available for immediate purchase (see the list). See the magnet price list for more details check the magnet price list

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magnetic holders

Magnetic holders can be applied to enhance production, exploring underwater areas, or searching for meteors from gold see more...

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SM 32x175 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130353

GTIN: 5906301813019

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diameter Ø

32 mm [±0,1 mm]

height

175 mm [±0,1 mm]

max. temperature

≤ 80 °C

528.90 PLN gross price (including VAT) / pcs +

430.00 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs
430.00 PLN
528.90 PLN
price from 6 pcs
408.50 PLN
502.45 PLN
price from 11 pcs
387.00 PLN
476.01 PLN

Want to bargain?

Call us tel: +48 888 99 98 98 or write via form on our website. You can check the power as well as the shape of neodymium magnets in our force calculator magnetic calculator

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

Specification: magnetic separator 32x175 [2xM8] / N42

Characteristics: magnetic separator 32x175 [2xM8] / N42
Properties
Values
catalog number
130353
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
32 mm [±0,1 mm]
height
175 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
940.00 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N42
ilość gwintów
2x [M8] wewnętrzne
biegunowość
obwodowa - 6 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 roller magnetic is based on the use of neodymium magnets, which are embedded in a casing made of stainless steel usually AISI304. As a result, it is possible to efficiently remove ferromagnetic particles from the mixture. An important element of its operation is the repulsion of magnetic poles N and S, which allows magnetic substances to be attracted. The thickness of the magnet and its structure pitch determine the power and range of the separator's operation.
Generally speaking, magnetic separators are designed to separate ferromagnetic elements. If the cans are made of ferromagnetic materials, a magnetic separator will be effective. 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 food production to remove metallic contaminants, such as iron fragments or iron dust. Our rods are made from durable acid-resistant steel, EN 1.4301, intended 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 during the process of separating metals from other materials.
Our magnetic rollers are built with neodymium magnets anchored in a stainless steel tube cylinder made of stainless steel with a wall thickness of 1mm.
From both sides of the magnetic bar can 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 forces, 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 as well as N52.
Generally it is believed that the stronger the magnet, the more efficient it is. But, 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 use 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 will be more compressed. Otherwise, when the magnet is thick, the force lines will be extended and extend over a greater distance.
For making the casings of magnetic separators - rollers, most often stainless steel is utilized, especially types AISI 316, AISI 316L, and AISI 304.
In a saltwater contact, AISI 316 steel exhibits the best resistance due to its outstanding anti-corrosion properties.
Magnetic rollers stand out for their unique configuration of poles and their capability to attract magnetic substances directly onto their surface, as opposed to other devices that may utilize more complicated filtration systems.
Technical designations and terms pertaining to magnetic separators comprise among others polarity, magnetic induction, magnet pitch, as well as the steel type applied.
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 verified 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 rollers offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. On the other hand, among the drawbacks, one can mention the requirement for frequent cleaning, greater weight, and potential installation difficulties.
To properly maintain of neodymium magnetic rollers, it is suggested {to clean them regularly from contaminants, avoid extremal temperatures up to 80°C, and cleaning after each use, avoiding temperatures above 80 degrees. The rollers have an IP67 waterproof rating, so if they are not sealed, the magnets inside may oxidize and lose their strength. Roller inspections are recommended to be conducted once every 24 months. Care should be taken as there is a possibility of finger injury. If the protective tube is only 0.5 mm thick, it can be worn down, which, in turn, can result in 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.

Find suggested articles

Advantages and disadvantages of neodymium magnets NdFeB.

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

  • They do not lose strength over time. After about 10 years, their strength decreases by only ~1% (theoretically),
  • They are exceptionally resistant to demagnetization caused by an external magnetic field,
  • 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...
  • Thanks to the flexibility in shaping or the ability to adapt to specific requirements – 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 apparatus and very highly developed apparatuses.

Disadvantages of neodymium magnets:

  • They are fragile 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 form and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
  • They rust in a humid environment - during outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
  • 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
  • Possible danger arising from small pieces of magnets are risky, when accidentally ingested, which is particularly important in the context of children's health. Additionally, miniscule components of these magnets have the potential to be problematic in medical diagnosis after entering the body.

Handle Neodymium Magnets with Caution

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

 It is important to keep neodymium magnets out of reach from youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

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

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. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

Magnets attract each other within a distance of several to about 10 cm from each other. Remember not to put fingers between magnets or alternatively in their path when they attract. Depending on how massive the neodymium magnets are, they can lead to a cut or alternatively a fracture.

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

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

The magnet coating is made of nickel, so be cautious 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.

Never bring neodymium magnets close to a phone and GPS.

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

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

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

Dust and powder from neodymium magnets are highly 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.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

So that know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous very powerful neodymium magnets.

Dhit sp. z o.o. logo

e-mail: bok@dhit.pl

tel: +48 888 99 98 98