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neodymium magnets

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SM 32x425 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130464

GTIN: 5906301813354

0

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

425 mm

Weight

2353 g

1340.70 with VAT / pcs + price for transport

1090.00 ZŁ net + 23% VAT / pcs

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SM 32x425 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 32x425 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130464
GTIN
5906301813354
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
425 mm [±0,1 mm]
Weight
2353 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

This product serves to catch ferromagnetic impurities from raw materials. Its task is to separate metal filings from the transported material. High magnetic induction allows catching the finest iron particles.
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.
Metal impurities are strongly attracted, making manual removal difficult. You can use compressed air or special non-magnetic strippers. In industry, cover tubes (Easy Clean) are used, from which the magnet is slid out.
The Gauss value tells us how effectively the magnet will catch small impurities. Standard rods (~8000 Gs) are sufficient for bolts, nails, and chips. High induction is required when contaminants are microscopic.
We can produce a rod with any mounting end. We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat studs, or handles. We ensure fast execution of special orders.

Pros and cons of rare earth magnets.

Besides their remarkable pulling force, neodymium magnets offer the following advantages:

  • They have stable power, and over around ten years their performance decreases symbolically – ~1% (according to theory),
  • Magnets very well protect themselves against loss of magnetization caused by foreign field sources,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the surface of the magnet turns out to be strong,
  • With the right combination of compounds, they reach increased thermal stability, enabling operation at or above 230°C (depending on the form),
  • Thanks to freedom in shaping and the capacity to modify to complex applications,
  • Universal use in high-tech industry – they find application in computer drives, electric motors, precision medical tools, as well as other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets: tips and applications.

  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 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.
  • Limited ability of making nuts in the magnet and complex forms - recommended is casing - magnetic holder.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Best holding force of the magnet in ideal parameterswhat affects it?

The declared magnet strength refers to the maximum value, recorded under ideal test conditions, meaning:

  • using a sheet made of mild steel, serving as a circuit closing element
  • with a cross-section no less than 10 mm
  • with an ideally smooth contact surface
  • with direct contact (no impurities)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature room level

Practical lifting capacity: influencing factors

In practice, the real power is determined by several key aspects, presented from crucial:

  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
  • Smoothness – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a small distance {between} the magnet’s surface and the plate lowers the load capacity.

Safety Precautions

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.

In the case of holding a finger in the path of a neodymium magnet, in that situation, a cut or a fracture may occur.

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.

Neodymium magnets are among the most powerful magnets on Earth. The astonishing 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.

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.

Magnets made of neodymium are highly delicate, they easily crack and can become damaged.

Neodymium magnets are fragile as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they 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.

Neodymium magnets can demagnetize at high temperatures.

Despite the fact that magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

Make sure not to bring neodymium magnets close to the 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, etc. devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Never bring neodymium magnets close to a phone and GPS.

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

 Keep neodymium magnets far from children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. 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.

Be careful!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98