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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our store's offer. Practically all magnesy neodymowe in our store are in stock for immediate delivery (see the list). See the magnet pricing for more details see the magnet price list

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SM 25x125 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130367

GTIN: 5906301813156

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

125 mm

Weight

0.01 g

393.60 with VAT / pcs + price for transport

320.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
320.00 ZŁ
393.60 ZŁ
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Lifting power along with appearance of a neodymium magnet can be calculated using our magnetic calculator.

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SM 25x125 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x125 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130367
GTIN
5906301813156
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
125 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 for cleaning raw materials. 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 rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. 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. For the food and precision industry, we recommend the highest induction parameters.
We can produce a rod of non-standard length with any mounting termination. We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. We ensure fast realization of special orders and technical advice.

Advantages and disadvantages of NdFeB magnets.

Besides their remarkable strength, neodymium magnets offer the following advantages:

  • They do not lose strength, even after around ten years – the reduction in power is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external disturbances,
  • The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnets have excellent magnetic induction on the outer side,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Thanks to the option of accurate forming and adaptation to individualized requirements, NdFeB magnets can be modeled in a variety of forms and dimensions, which expands the range of possible applications,
  • Fundamental importance in innovative solutions – they serve a role in data components, brushless drives, advanced medical instruments, and complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Problematic aspects of neodymium magnets: tips and applications.

  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of producing nuts in the magnet and complicated shapes - preferred is cover - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
  • Due to expensive raw materials, their price is relatively high,

Detachment force of the magnet in optimal conditionswhat it depends on?

Information about lifting capacity is the result of a measurement for the most favorable conditions, including:

  • with the application of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an ground touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In real-world applications, the real power is determined by several key aspects, listed from crucial:

  • Clearance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. In addition, even a small distance {between} the magnet and the plate reduces the load capacity.

Warnings

GPS and phone interference

Remember: rare earth magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.

Operating temperature

Do not overheat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

This is not a toy

Only for adults. Tiny parts pose a choking risk, causing intestinal necrosis. Store away from children and animals.

Powerful field

Handle magnets consciously. Their powerful strength can shock even professionals. Plan your moves and do not underestimate their force.

Keep away from computers

Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).

Dust explosion hazard

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Hand protection

Big blocks can crush fingers in a fraction of a second. Do not put your hand between two attracting surfaces.

Avoid contact if allergic

Studies show that nickel (standard magnet coating) is a strong allergen. If you have an allergy, avoid direct skin contact and select encased magnets.

Magnet fragility

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Life threat

People with a pacemaker must keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.

Security!

Want to know more? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98