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neodymium magnets

We provide red color magnets Nd2Fe14B - our store's offer. All "neodymium magnets" on our website are available for immediate delivery (check the list). Check out the magnet price list for more details see the magnet price list

Magnet for water searching F300 GOLD

Where to purchase very strong neodymium magnet? Magnet holders in airtight and durable steel enclosure are ideally suited for use in challenging climate conditions, including in the rain and snow see

magnetic holders

Magnetic holders can be applied to improve production processes, exploring underwater areas, or finding meteorites made of metal more information...

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SMZR 25x225 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140235

GTIN: 5906301813439

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

225 mm

Weight

0.01 g

615.00 with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

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SMZR 25x225 / N52 - magnetic separator with handle
Specification/characteristics SMZR 25x225 / N52 - magnetic separator with handle
properties
values
Cat. no.
140235
GTIN
5906301813439
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
225 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 an essential at every scrap yard, waste sorting plant, and workshop. It enables effective segregation of materials in the yard and accepting goods. It is also useful for pulling small steel elements from crates, ash, sand, or sawdust.
The magnet "catches" iron but remains completely indifferent to aluminum, copper, brass, and zinc. If the magnet does not attract the tested element, it is probably non-ferrous metal or acid-resistant steel.
Neodymium separators are much lighter and many times stronger than traditional ferrite ones. Thanks to this, work is more comfortable, and detection faster and more certain. The neodymium version is currently the standard in professional scrap yards.
The construction consists of a hermetic can protecting the magnet and an ergonomic handle. A solid handle (wooden, rubber, or plastic) ensures a firm and comfortable grip. The tool is durable, drop-resistant, and prepared for hard work.
It is a simple and reliable construction without moving parts, so cleaning consists of removing scrap. We also offer versions where pulling the handle automatically drops collected material. In the case of strong magnets, it is easiest to slide the metal to the side of the housing instead of tearing it straight off.

Advantages as well as disadvantages of NdFeB magnets.

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

  • Their power remains stable, and after around ten years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss when exposed to external fields,
  • A magnet with a metallic silver surface looks better,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • 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...
  • Thanks to versatility in shaping and the capacity to adapt to client solutions,
  • Fundamental importance in electronics industry – they are commonly used in HDD drives, electric drive systems, advanced medical instruments, also industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

What to avoid - cons of neodymium magnets and proposals for their use:

  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest 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 a housing - magnet mounting.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Furthermore, small components of these products can disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Maximum lifting capacity of the magnetwhat contributes to it?

The lifting capacity listed is a theoretical maximum value performed under specific, ideal conditions:

  • on a block made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with a plane free of scratches
  • with zero gap (without coatings)
  • during pulling in a direction perpendicular to the plane
  • at standard ambient temperature

Lifting capacity in real conditions – factors

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

  • Gap between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Plate material – mild steel attracts best. Alloy admixtures reduce magnetic permeability and lifting capacity.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness 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 checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with NdFeB magnets

Fire warning

Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Keep away from electronics

Note: rare earth magnets generate a field that disrupts precision electronics. Keep a safe distance from your phone, tablet, and GPS.

Danger to the youngest

These products are not toys. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and necessitates immediate surgery.

Allergy Warning

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact or choose encased magnets.

ICD Warning

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Bone fractures

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Safe distance

Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Demagnetization risk

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Magnet fragility

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Caution required

Exercise caution. Neodymium magnets act from a distance and connect with huge force, often quicker than you can move away.

Safety First!

Need more info? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98