← previous

Product available shipping tomorrow

SM 18x100 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130269

GTIN: 5906301812715

Diameter Ø [±0,1 mm]

18 mm

Height [±0,1 mm]

100 mm

Weight

0.01 g

221.40 ZŁ with VAT / pcs + price for transport

180.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

180.00 ZŁ

221.40 ZŁ

price from 15 pcs

171.00 ZŁ

210.33 ZŁ

price from 25 pcs

162.00 ZŁ

199.26 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need advice?

Contact us by phone +48 22 499 98 98 otherwise drop us a message via inquiry form through our site.
Force as well as form of neodymium magnets can be tested using our power calculator.

Orders placed before 14:00 will be shipped the same business day.

SM 18x100 [2xM5] / N42 - magnetic separator

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

Specification/characteristics SM 18x100 [2xM5] / N42 - magnetic separator

properties

values

Cat. no.

130269

GTIN

5906301812715

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

18 mm [±0,1 mm]

Height

100 mm [±0,1 mm]

Weight

0.01 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material 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 NdFeB

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

Shopping tips

Product available wysyłka jutro!

MW 2x4 / N38 - cylindrical magnet

0.209 ZŁ / pcs

Product available wysyłka jutro!

UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread

8.61 ZŁ / pcs

Product available wysyłka jutro!

MW 20x1.5 / N38 - cylindrical magnet

1.574 ZŁ / pcs

Product available wysyłka jutro!

UI 17.5x5 [C310] / N38 - badge holder

1.316 ZŁ / pcs

The device rod magnetic is based on the use of neodymium magnets, placed in a casing made of stainless steel mostly AISI304. As a result, it is possible to precisely segregate ferromagnetic particles from different substances. A key aspect 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 designed to segregate 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 effectively segregate them.

Yes, magnetic rollers are used in the food industry to remove metallic contaminants, such as iron fragments or iron dust. Our rods are built from acid-resistant steel, EN 1.4301, suitable for contact with food.

Magnetic rollers, otherwise magnetic separators, are used in metal separation, food production as well as waste processing. They help in removing iron dust in the course of the process of separating metals from other materials.

Our magnetic rollers are built with a neodymium magnet anchored in a tube of stainless steel with a wall thickness of 1mm.

From both sides of the magnetic bar can be with M8 threaded openings, which enables 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 flux density, magnetic force lines and the field 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. But, the effectiveness of the magnet's power is based 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 expected needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is thin, the magnetic force lines are short. On the other hand, in the case of a thicker magnet, 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 used, especially types AISI 304, AISI 316, and AISI 316L.

In a saltwater environment, AISI 316 steel is recommended thanks to its exceptional anti-corrosion properties.

Magnetic bars are characterized by their unique configuration of poles and their ability to attract magnetic substances directly onto their surface, in contrast to other devices that often use more complicated filtration systems.

Technical designations and terms pertaining to magnetic separators include amongst others magnet pitch, polarity, and magnetic induction, 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, seeking 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 suggest 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. On the other hand, among the drawbacks, one can mention higher cost compared to other types of magnets and the need for regular maintenance.

For proper maintenance of neodymium magnetic rollers, you should regularly cleaning them from contaminants, avoiding extreme temperatures up to 80°C, and protecting them from moisture if the threads are not sealed – in ours, they are. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and weaken. Testing of the rollers should be carried out every two years. Care should be taken, as it’s possible 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.

Magnetic rollers are cylindrical neodymium magnets placed in a casing made of corrosion-resistant stainless steel, which are used to remove metal contaminants from bulk and granular materials. They are applied in industries such as food processing, ceramics, and recycling, where the removal of iron metals and iron filings is essential.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their tremendous pulling force, neodymium magnets offer the following advantages:

They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
They remain magnetized despite exposure to magnetic surroundings,
Thanks to the glossy finish and gold coating, they have an aesthetic appearance,
They possess strong magnetic force measurable at the magnet’s surface,
Neodymium magnets are known for exceptionally strong magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the shape),
With the option for customized forming and precise design, these magnets can be produced in numerous shapes and sizes, greatly improving application potential,
Wide application in modern technologies – they are utilized in HDDs, electromechanical systems, healthcare devices along with technologically developed systems,
Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of magnetic elements:

They can break when subjected to a strong impact. If the magnets are exposed to mechanical hits, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage and increases its overall strength,
They lose magnetic force at increased temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of protective material for outdoor use,
The use of a protective casing or external holder is recommended, since machining fine details in neodymium magnets is not feasible,
Possible threat linked to microscopic shards may arise, when consumed by mistake, which is crucial in the family environments. Moreover, miniature parts from these products might interfere with diagnostics after being swallowed,
Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Detachment force of the magnet in optimal conditions – what it depends on?

The given pulling force of the magnet represents the maximum force, calculated in ideal conditions, that is:

using a steel plate with low carbon content, serving as a magnetic circuit closure
of a thickness of at least 10 mm
with a smooth surface
with zero air gap
with vertical force applied
under standard ambient temperature

Practical lifting capacity: influencing factors

In practice, the holding capacity of a magnet is affected by these factors, in descending order of importance:

Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance {between} the magnet’s surface and the plate lowers the holding force.

Handle Neodymium Magnets Carefully

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

Intense 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 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.

Neodymium magnets will bounce and clash together within a radius of several to almost 10 cm from each other.

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

Neodymium magnets produce intense magnetic fields that can destroy 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 away from these electronic devices.

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are not recommended for people with pacemakers.

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.

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.

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.

It is essential to maintain neodymium magnets out of reach from 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.

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

To use 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.

Neodymium magnetic are known for being fragile, which can cause them to shatter.

Neodymium magnets are fragile and 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. 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.

Caution!

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