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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

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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. Its task is to separate metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even fine metal dust.
The construction is based on a sealed stainless steel housing. Inside, there is a stack of strong neodymium magnets in a special configuration. Thanks to this, the rod is durable and hygienic.
Metal impurities are strongly attracted, making manual removal difficult. The most effective method is using adhesive tape to wrap the dirt and pull it off. In industry, cover tubes (Easy Clean) are used, from which the magnet is slid out.
Magnetic induction measured in Gauss (Gs) determines the magnetic flux density on the rod surface. For basic iron protection, standard power is enough. High Power versions (~12000-14000 Gs) are necessary to catch metal dust and stainless steel after processing.
We fulfill custom orders for bars matched to your machine. You can choose a mounting method compatible with your project. Contact us for a quote on non-standard dimensions.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • They do not lose their even during nearly 10 years – the decrease of lifting capacity is only ~1% (based on measurements),
  • They protect against demagnetization induced by external magnetic influence effectively,
  • The use of a polished silver surface provides a smooth finish,
  • They possess strong magnetic force measurable at the magnet’s surface,
  • With the right combination of materials, they reach increased thermal stability, enabling operation at or above 230°C (depending on the design),
  • With the option for tailored forming and targeted design, these magnets can be produced in numerous shapes and sizes, greatly improving application potential,
  • Significant impact in cutting-edge sectors – they serve a purpose in HDDs, electric motors, medical equipment along with other advanced devices,
  • Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of magnetic elements:

  • They are fragile when subjected to a heavy impact. If the magnets are exposed to shocks, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from fracture and reinforces its overall resistance,
  • High temperatures may significantly reduce the magnetic power of neodymium magnets. Typically, above 80°C, they experience permanent weakening in performance (depending on size). 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,
  • They rust in a wet environment. For outdoor use, we recommend using waterproof magnets, such as those made of polymer,
  • Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing fine shapes directly in the magnet,
  • Safety concern from tiny pieces may arise, especially if swallowed, which is notable in the protection of children. Moreover, minuscule fragments from these devices may hinder health screening after being swallowed,
  • Due to the price of neodymium, their cost is relatively high,

Maximum lifting capacity of the magnetwhat contributes to it?

The given lifting capacity of the magnet means the maximum lifting force, calculated under optimal conditions, specifically:

  • with the use of low-carbon steel plate serving as a magnetic yoke
  • having a thickness of no less than 10 millimeters
  • with a polished side
  • in conditions of no clearance
  • in a perpendicular direction of force
  • at room temperature

Practical lifting capacity: influencing factors

The lifting capacity of a magnet is determined by in practice the following factors, according to their 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 was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a small distance {between} the magnet and the plate decreases the load capacity.

Be Cautious with Neodymium Magnets

Neodymium magnets are the most powerful magnets ever invented. Their power can shock you.

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

Neodymium magnetic are particularly fragile, resulting in damage.

Neodymium magnets are delicate and will break 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. At the moment of collision between the magnets, tiny sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

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

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

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 damage videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

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

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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

People with pacemakers are advised to avoid neodymium magnets.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes 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.

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.

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.

Keep neodymium magnets as far away as possible from 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.

Neodymium magnets can attract to each other, pinch the skin, and cause significant swellings.

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

Exercise caution!

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

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tel: +48 888 99 98 98