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neodymium magnets

We provide blue color magnets Nd2Fe14B - our proposal. All magnesy neodymowe on our website are available for immediate delivery (check the list). See the magnet pricing for more details check the magnet price list

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SM 25x350 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130355

GTIN: 5906301813033

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

350 mm

Weight

0.01 g

1057.80 with VAT / pcs + price for transport

860.00 ZŁ net + 23% VAT / pcs

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SM 25x350 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x350 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130355
GTIN
5906301813033
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
350 mm [±0,1 mm]
Weight
0.01 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N52

properties
values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
T
coercivity bHc ?
10.8-12.5
kOe
coercivity bHc ?
860-995
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
48-53
BH max MGOe
energy density [Min. - Max.] ?
380-422
BH max KJ/m
max. temperature ?
≤ 80
°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

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

It is the heart of every magnetic filter used in industry. 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 rod consists of a casing tube made of acid-resistant steel (AISI 304/316). The core is a magnetic circuit generating high induction. Thanks to this, the rod is durable and hygienic.
Due to high power, direct removal of filings can be troublesome. We recommend taping the filings and peeling them off together. 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. For the food and precision industry, we recommend the highest parameters.
We can produce a rod with any mounting end. You can choose a mounting method compatible with your project. Contact us for a quote on non-standard dimensions.

Advantages as well as disadvantages of neodymium magnets.

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:

  • Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (according to research),
  • They retain their magnetic properties even under close interference source,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the surface of the magnet remains very high,
  • Due to their enhanced temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
  • Possibility of individual creating as well as modifying to precise needs,
  • Fundamental importance in future technologies – they are utilized in data components, electromotive mechanisms, precision medical tools, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages of NdFeB magnets:

  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Breakaway strength of the magnet in ideal conditionswhat affects it?

The lifting capacity listed is a measurement result conducted under standard conditions:

  • with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • whose transverse dimension equals approx. 10 mm
  • characterized by smoothness
  • without any clearance between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual lifting capacity depends on a number of factors, presented from the most important:

  • Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate decreases the load capacity.

Safety Precautions

Avoid contact with neodymium magnets 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.

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

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Do not place neodymium magnets 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 destroy devices like video players, 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. Once crushed into fine powder or dust, this material becomes highly flammable.

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 will attract each other within a distance of several to around 10 cm from each other. Remember not to put fingers between magnets or alternatively in their path when attract. Magnets, depending on their size, are able even cut off a finger or alternatively there can be a severe pressure or a fracture.

Magnets made of neodymium are incredibly fragile, they easily crack and can become damaged.

Neodymium magnets are highly delicate, and by joining them in an uncontrolled manner, they will crack. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

  Do not give neodymium magnets to children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets can demagnetize at high temperatures.

Although magnets are generally resilient, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Never bring neodymium magnets close to a phone and GPS.

Neodymium magnets produce intense magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Caution!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98