← previous

Product available shipping tomorrow!

SM 32x225 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130375

GTIN: 5906301813231

no reviews

diameter Ø

32 mm [±0,1 mm]

height

225 mm [±0,1 mm]

max. temperature

≤ 80 °C

750.30 PLN gross price (including VAT) / pcs +

610.00 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs

610.00 PLN

750.30 PLN

price from 4 pcs

579.50 PLN

712.78 PLN

price from 8 pcs

549.00 PLN

675.27 PLN

Don't know what to buy?

Call us tel: +48 22 499 98 98 or write via contact form on the contact page. You can check the power and the appearance of neodymium magnets in our magnetic mass calculator magnetic calculator

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

Specification: magnetic separator 32x225 [2xM8] / N42

Characteristics: magnetic separator 32x225 [2xM8] / N42

Properties

Values

catalog number

130375

GTIN

5906301813231

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

1245.00 g

execution tolerance

± 0.1 mm

rodzaj materiału

AISI 304 - bezpieczna dla żywności

rodzaj magnesów

NdFeB N42

ilość gwintów

2x [M8] wewnętrzne

biegunowość

obwodowa - 8 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

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

Properties

Values

units

Vickers hardness

≥550

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, placed in a casing made of stainless steel usually AISI304. Due to this, it is possible to precisely separate ferromagnetic elements from other materials. An important element of its operation is the repulsion of magnetic poles N and S, which allows magnetic substances to be collected. The thickness of the embedded magnet and its structure pitch determine the power and range of the separator's operation.

Generally speaking, magnetic separators are used to extract ferromagnetic particles. If the cans are ferromagnetic, 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 the food industry to remove metallic contaminants, for example iron fragments or iron dust. Our rollers are made from durable acid-resistant steel, AISI 304, suitable for use in food.

Magnetic rollers, often called cylindrical magnets, are used in food production, metal separation as well as waste processing. They help in removing iron dust during the process of separating metals from other materials.

Our magnetic rollers are built with neodymium magnets placed in a stainless steel tube cylinder of stainless steel with a wall thickness of 1mm.

From both sides of the magnetic bar will be with M8 threaded holes - 18 mm, enabling easy installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of forces, magnetic bars stand out in terms of magnetic force lines, flux density and the field of the magnetic field. We produce them in materials, N42 as well as N52.

Often it is believed that the greater the magnet's power, the better. However, 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.

When the magnet is thin, 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 constructing the casings of magnetic separators - rollers, most often stainless steel is employed, particularly types AISI 304, AISI 316, and AISI 316L.

In a salt water contact, type AISI 316 steel exhibits the best resistance due to its exceptional corrosion resistance.

Magnetic bars are characterized by their specific arrangement of poles and their ability to attract magnetic particles directly onto their surface, as opposed to other devices that may utilize complex filtration systems.

Technical designations and terms related to magnetic separators comprise amongst 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 outcome is checked in a value table - the lowest is N30. All designations less than N27 or N25 indicate recycling that doesn't meet the standard - they are not suitable.

Neodymium magnetic rollers offer many advantages, including higher attracting power, longer lifespan, and effectiveness in separating fine metal particles. However, some of the downsides may involve the need for regular cleaning, higher cost, and potential installation challenges.

For proper maintenance of neodymium magnetic rollers, it is suggested {to clean them regularly from contaminants, avoid extreme temperatures up to 80°C, and to clean them regularly, 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. Magnetic field measurements 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, 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.

List recommended items

Product available shipping tomorrow!

conical magnetic holder 16x6.5x3.5x5 / N38

3.35 PLN / pcs

Product available shipping tomorrow! Bestseller

cylindrical magnet 5x4 / N38 ↑ axial

0.34 PLN / pcs

Product available shipping tomorrow!

ring magnet 15x7/3.5x5 / N38 ↑ axial

5.90 PLN / pcs

Product available shipping tomorrow!

magnetic separator 18x200 [2xM5] / N42

442.80 PLN / pcs

Advantages and disadvantages of neodymium magnets NdFeB.

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

They do not lose their strength (of the magnet). After approximately 10 years, their power decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic sources,
Thanks to the shiny finish and nickel, gold, or silver coating, they have an aesthetic appearance,
They have 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 and adaptation to individual needs – neodymium magnets can be produced in various forms and dimensions, which enhances their versatility in applications.
Significant importance in advanced technologically fields – are utilized in HDD drives, electric motors, medical apparatus or other modern machines.

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 power 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 recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
Health risk to health from tiny fragments of magnets are risky, when accidentally ingested, which is crucial in the aspect of protecting young children. It's also worth noting that miniscule components of these devices are able to hinder the diagnostic process after entering the body.

Safety Precautions

Neodymium magnets can demagnetize 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.

The magnet coating contains nickel, so be cautious if you have a nickel 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.

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

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.

People with pacemakers are advised to avoid neodymium magnets.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

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

The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are among the strongest magnets on Earth. The astonishing force they generate between each other can shock you.

To handle magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

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

Neodymium magnets are a source of intense magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are noted for being fragile, which can cause them to crumble.

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. 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.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

If joining of neodymium magnets is not controlled, at that time they may crumble and also crack. You can't move them to each other. At a distance less than 10 cm you should hold them very strongly.

In order to illustrate why neodymium magnets are so dangerous, see the article - How very dangerous are powerful neodymium magnets?.

SM 32x225 [2xM8] / N42 - magnetic roller

magnetic separator

Specification: magnetic separator 32x225 [2xM8] / N42

Magnetic properties of the material N42

Physical properties of sintered neodymium magnets Nd2Fe14B

List recommended items

conical magnetic holder 16x6.5x3.5x5 / N38

cylindrical magnet 5x4 / N38 ↑ axial

ring magnet 15x7/3.5x5 / N38 ↑ axial

magnetic separator 18x200 [2xM5] / N42

Advantages and disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B