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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our proposal. Practically all magnesy in our store are available for immediate delivery (see the list). Check out the magnet pricing for more details see the magnet price list

Magnets for fishing F300 GOLD

Where to purchase strong neodymium magnet? Magnetic holders in solid and airtight steel casing are excellent for use in difficult, demanding weather conditions, including in the rain and snow read

magnets with holders

Holders with magnets can be used to facilitate production processes, underwater discoveries, or searching for meteorites made of ore see more...

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SMZR 25x225 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140235

GTIN: 5906301813439

5.00

Diameter Ø

25 mm [±1 mm]

Height

225 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

615.00 with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Specifications and shape of magnetic components can be tested with our magnetic mass calculator.

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SMZR 25x225 / N52 - magnetic separator with handle

Specification / characteristics SMZR 25x225 / N52 - magnetic separator with handle

properties
properties values
Cat. no. 140235
GTIN 5906301813439
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 25 mm [±1 mm]
Height 225 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 9 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 8 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x225 / N52 - magnetic separator with handle
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

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

Other proposals

A manual separator is a basic tool for quick identification and sorting of metals. Thanks to it, you can easily and quickly assess the value of scrap and avoid mistakes. It is also useful for pulling small steel elements from crates, ash, sand, or sawdust.
A neodymium magnet attracts only ferromagnetic metals, such as ordinary steel (black) and cast iron. This is the simplest and fastest test to distinguish valuable non-ferrous metals from cheap steel.
The neodymium model offers powerful force with low weight, which drastically reduces hand fatigue. Strong neodymium field detects even weakly magnetic alloys and contaminants. This is a modern solution displacing heavy and weak ferrite magnets.
The construction consists of a hermetic can protecting the magnet and an ergonomic handle. The grip was designed so as not to slip in the hand, even in a work glove. Thanks to such an armored build, the separator is resistant to difficult conditions prevailing at a scrap yard.
Standard manual separators (such as SMZR 25x225 / N52) do not have a release mechanism and require manual cleaning. If you are looking for automatic dropping, ask about models with a magnetic release system. 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 and disadvantages of NdFeB magnets.

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

  • They retain magnetic properties for almost ten years – the drop is just ~1% (according to analyses),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • A magnet with a smooth silver surface has better aesthetics,
  • Magnets are distinguished by exceptionally strong magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of exact shaping as well as modifying to precise needs,
  • Versatile presence in modern industrial fields – they are commonly used in data components, electromotive mechanisms, advanced medical instruments, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in miniature devices

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

  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets decrease their power 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 secure oxidation and corrosion.
  • We recommend cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these magnets can complicate diagnosis medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Maximum lifting force for a neodymium magnet – what affects it?

The lifting capacity listed is a result of laboratory testing executed under specific, ideal conditions:

  • on a plate made of mild steel, effectively closing the magnetic field
  • whose thickness is min. 10 mm
  • characterized by even structure
  • with direct contact (no paint)
  • during detachment in a direction perpendicular to the plane
  • at standard ambient temperature

Lifting capacity in real conditions – factors

Real force is influenced by working environment parameters, such as (from most important):

  • Distance – existence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas 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 reduces the lifting capacity.

Safety rules for work with neodymium magnets

Risk of cracking

NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them cracking into shards.

Crushing risk

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

Nickel allergy

Studies show that nickel (the usual finish) is a potent allergen. If you have an allergy, avoid direct skin contact or select encased magnets.

Keep away from computers

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Power loss in heat

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Conscious usage

Use magnets with awareness. Their immense force can shock even professionals. Plan your moves and respect their power.

Machining danger

Dust created during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Health Danger

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Impact on smartphones

Note: rare earth magnets produce a field that confuses precision electronics. Maintain a separation from your phone, tablet, and navigation systems.

Product not for children

Absolutely store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are life-threatening.

Danger!

Details about risks in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98