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neodymium magnets

We provide blue color magnets Nd2Fe14B - our offer. Practically all "magnets" on our website are in stock for immediate delivery (check the list). Check out the magnet pricing for more details see the magnet price list

Magnet for fishing F200 GOLD

Where to buy strong neodymium magnet? Magnetic holders in airtight and durable steel enclosure are perfect for use in difficult, demanding weather conditions, including during snow and rain more information

magnetic holders

Holders with magnets can be used to enhance production, underwater discoveries, or locating meteors made of ore read...

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SM 25x325 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130370

GTIN: 5906301813187

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

325 mm

Weight

0.01 g

984.00 with VAT / pcs + price for transport

800.00 ZŁ net + 23% VAT / pcs

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SM 25x325 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x325 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130370
GTIN
5906301813187
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
325 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

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. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.
Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Pros and cons of neodymium magnets.

Besides their durability, neodymium magnets are valued for these benefits:

  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Magnets very well resist against loss of magnetization caused by ambient magnetic noise,
  • Thanks to the metallic finish, the layer of nickel, gold, or silver-plated gives an elegant appearance,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact shaping as well as optimizing to complex needs,
  • Key role in advanced technology sectors – they are utilized in hard drives, electromotive mechanisms, precision medical tools, also modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Characteristics of disadvantages of neodymium magnets and ways of using them

  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Magnetic strength at its maximum – what it depends on?

Information about lifting capacity is the result of a measurement for ideal contact conditions, assuming:

  • with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • characterized by smoothness
  • under conditions of no distance (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

Please note that the application force will differ subject to the following factors, starting with the most relevant:

  • Gap (between the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Plate thickness – too thin steel does not accept the full field, causing part of the flux to be lost into the air.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet and the plate lowers the holding force.

Warnings

This is not a toy

These products are not toys. Eating a few magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Heat sensitivity

Keep cool. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Sensitization to coating

Certain individuals suffer from a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling might lead to an allergic reaction. We recommend wear protective gloves.

Protect data

Powerful magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

ICD Warning

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Combustion hazard

Drilling and cutting of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Shattering risk

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Physical harm

Danger of trauma: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Conscious usage

Exercise caution. Neodymium magnets attract from a distance and snap with huge force, often quicker than you can react.

GPS and phone interference

GPS units and mobile phones are extremely sensitive to magnetism. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Danger!

Need more info? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98