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neodymium magnets

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SM 32x375 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130379

GTIN: 5906301813279

0

Diameter Ø

32 mm [±1 mm]

Height

375 mm [±1 mm]

Weight

2010 g

Magnetic Flux

~ 8 000 Gauss [±5%]

1119.30 with VAT / pcs + price for transport

910.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
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1119.30 ZŁ
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Lifting power along with form of a neodymium magnet can be checked on our magnetic calculator.

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SM 32x375 [2xM8] / N42 - magnetic separator
Specification/characteristics SM 32x375 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130379
GTIN
5906301813279
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
375 mm [±1 mm]
Weight
2010 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 8 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 14 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±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 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

A magnetic rod is the basic element of building grate separators and magnetic filters. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.
The outer layer is hygienic acid-resistant steel, approved for food contact. The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Such construction ensures full resistance to corrosion, water, oils, and acids.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.
We can produce a rod of non-standard length with any mounting termination. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Pros and cons of NdFeB magnets.

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

  • They have stable power, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
  • Neodymium magnets remain extremely resistant to magnetic field loss caused by external field sources,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to flexibility in constructing and the capacity to modify to complex applications,
  • Key role in modern industrial fields – they are utilized in computer drives, motor assemblies, medical equipment, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices

What to avoid - cons of neodymium magnets: tips and applications.

  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in realizing threads and complex forms in magnets, we propose using casing - magnetic mount.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these products are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength refers to the peak performance, recorded under optimal environment, meaning:

  • on a block made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with a plane perfectly flat
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the plane
  • at temperature room level

Practical lifting capacity: influencing factors

Real force impacted by specific conditions, including (from priority):

  • Air gap (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Alloy steels lower magnetic properties and holding force.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a small distance {between} the magnet’s surface and the plate decreases the load capacity.

Warnings

Cards and drives

Data protection: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Phone sensors

Be aware: rare earth magnets produce a field that interferes with precision electronics. Keep a separation from your phone, device, and navigation systems.

Health Danger

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Keep away from children

These products are not intended for children. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and necessitates urgent medical intervention.

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease working with magnets and wear gloves.

Immense force

Handle magnets with awareness. Their powerful strength can surprise even professionals. Plan your moves and respect their power.

Crushing force

Risk of injury: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Do not overheat magnets

Do not overheat. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Magnet fragility

Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Dust is flammable

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Danger!

Looking for details? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98