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SM 25x200 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130291

GTIN: 5906301812845

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

200 mm

Weight

0.01 g

541.20 with VAT / pcs + price for transport

440.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Parameters along with form of a neodymium magnet can be estimated on our modular calculator.

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SM 25x200 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 25x200 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130291
GTIN
5906301812845
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
200 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
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 NdFeB

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

Shopping tips

This product serves to catch ferromagnetic impurities from raw materials. It is installed in chutes and hoppers to protect production machinery. High magnetic induction allows catching the finest iron particles.
The rod consists of a casing tube made of acid-resistant steel (AISI 304/316). Inside, there is a stack of strong neodymium magnets in a special configuration. Thanks to this, the rod is durable and hygienic.
Metal filings stick very firmly to the surface, so cleaning requires strength or a trick. The most effective method is using adhesive tape to wrap the dirt and pull it off. For easier maintenance, consider a system with a cleaning sleeve.
The Gauss value tells us how effectively the magnet will catch small impurities. For basic iron protection, standard power is enough. High induction is required when contaminants are microscopic.
We can produce a rod with any mounting end. The rod end is adapted to the mounting system in your separator. Contact us for a quote on non-standard dimensions.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

  • They retain their attractive force for nearly ten years – the loss is just ~1% (in theory),
  • Their ability to resist magnetic interference from external fields is notable,
  • Because of the brilliant layer of gold, the component looks high-end,
  • The outer field strength of the magnet shows elevated magnetic properties,
  • Neodymium magnets are known for very high 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 design adaptation,
  • Wide application in modern technologies – they serve a purpose in HDDs, rotating machines, medical equipment or even other advanced devices,
  • Thanks to their efficiency per volume, small magnets offer high magnetic performance, in miniature format,

Disadvantages of magnetic elements:

  • They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to external force, it is advisable to use in a metal holder. The steel housing, in the form of a holder, protects the magnet from fracture while also reinforces its overall resistance,
  • High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on form). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
  • Magnets exposed to wet conditions can degrade. Therefore, for outdoor applications, we advise waterproof types made of rubber,
  • Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing threads directly in the magnet,
  • Health risk due to small fragments may arise, if ingested accidentally, which is notable in the health of young users. Additionally, miniature parts from these magnets might complicate medical imaging after being swallowed,
  • Due to expensive raw materials, their cost is relatively high,

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The given strength of the magnet represents the optimal strength, determined under optimal conditions, namely:

  • with the use of low-carbon steel plate acting as a magnetic yoke
  • having a thickness of no less than 10 millimeters
  • with a polished side
  • with zero air gap
  • under perpendicular detachment force
  • under standard ambient temperature

What influences lifting capacity in practice

In practice, the holding capacity of a magnet is affected by these factors, from crucial to less important:

  • Air gap between the magnet and the plate, as 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 carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate reduces the lifting capacity.

Be Cautious with Neodymium Magnets

Neodymium magnetic are extremely delicate, they easily crack and can crumble.

Neodymium magnets are delicate 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. 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.

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

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

If have a finger between or alternatively on the path of attracting magnets, there may be a large cut or a fracture.

Dust and powder from neodymium magnets are flammable.

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

People with pacemakers are advised to avoid neodymium magnets.

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 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.

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

Not all neodymium magnets are toys, so do not let children play with them. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

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.

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.

Do not bring neodymium magnets close to GPS and smartphones.

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

Caution!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98