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neodymium magnets

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SMZR 25x100 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140232

GTIN/EAN: 5906301813408

5.00

Diameter Ø

25 mm [±1 mm]

Height

100 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

307.50 with VAT / pcs + price for transport

250.00 ZŁ net + 23% VAT / pcs

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SMZR 25x100 / N52 - magnetic separator with handle

Specification / characteristics SMZR 25x100 / N52 - magnetic separator with handle

properties
properties values
Cat. no. 140232
GTIN/EAN 5906301813408
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 100 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 - 3 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x100 / N52 - magnetic separator with handle
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
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 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²
Technical and environmental data
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 140232-2025
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Pulling Force

Magnetic Field

Other deals

A manual separator is a basic tool for quick identification and sorting of metals. It allows checking if a given item is ferromagnetic (steel, cast iron) or not (aluminum, copper, stainless steel). It can be used to collect scattered nails and screws from hard-to-reach places.
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.
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. 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. The tool is durable, drop-resistant, and prepared for hard work.
In this model, collected metal must be torn off manually (preferably in a work glove). 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 Nd2Fe14B magnets.

Benefits
Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even during approximately 10 years – the reduction in strength is only ~1% (based on measurements),
  • They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • Thanks to the elegant finish, the layer of nickel, gold, or silver-plated gives an clean appearance,
  • Magnets possess exceptionally strong magnetic induction on the outer side,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in shaping and the capacity to modify to complex applications,
  • Versatile presence in innovative solutions – they are commonly used in computer drives, electric motors, medical equipment, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions
Weaknesses
Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • 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 durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in realizing threads and complicated forms in magnets, we propose using cover - magnetic holder.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum magnetic pulling forcewhat contributes to it?
Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • with the contact of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • with a cross-section of at least 10 mm
  • with a surface cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in neutral thermal conditions
Determinants of lifting force in real conditions
Real force impacted by working environment parameters, including (from priority):
  • Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin steel causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel type – low-carbon steel attracts best. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Thermal limits

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

Life threat

People with a ICD have to maintain an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Physical harm

Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Mechanical processing

Drilling and cutting of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Keep away from computers

Equipment safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

No play value

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Store away from kids and pets.

Conscious usage

Handle magnets consciously. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Magnets are brittle

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets leads to them cracking into small pieces.

Keep away from electronics

Note: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a separation from your mobile, device, and GPS.

Sensitization to coating

Certain individuals suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling might lead to skin redness. We strongly advise wear safety gloves.

Important! Want to know more? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98