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SMZR 25x250 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140236

GTIN/EAN: 5906301813446

5.00

Diameter Ø

25 mm [±1 mm]

Height

250 mm [±1 mm]

Weight

840 g

Magnetic Flux

~ 8 500 Gauss [±5%]

check technical specifications »

676.50 ZŁ with VAT / pcs + price for transport

550.00 ZŁ net + 23% VAT / pcs

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Pick up the phone and ask +48 22 499 98 98 alternatively get in touch using inquiry form our website.
Lifting power along with form of magnets can be estimated on our modular calculator.

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Detailed specification - SMZR 25x250 / N52 - magnetic separator with handle

Specification / characteristics - SMZR 25x250 / N52 - magnetic separator with handle

properties
properties values
Cat. no. 140236
GTIN/EAN 5906301813446
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 250 mm [±1 mm]
Weight 840 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 500 Gauss [±5%]
Size/Mount Quantity M8x2
Polarity circumferential - 9 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x250 / 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

Table 1: Rod construction
SMZR 25x250 / N52

Parameter Value Description / Unit
Diameter (Ø) 25 mm
Total length 250 mm (L)
Active length 230 mm
Section count 10 modules
Dead zone 20 mm (Blaszka 2mm + Gwint 18mm)
Weight (est.) ~933 g
Active area 181 cm² (Area)
Housing material AISI 304 1.4301 (Inox)
Surface finish Ra < 0.8 µm Polished
Temp. class 80°C Standard (N)
Force loss (at max °C) -12.8% Reversible loss (physics)
Force (calculated) 18.1 kg (theor.)
Induction (surface) ~8 500 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (10 sections)

Simulation: 10 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

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: 140236-2026
Measurement Calculator
Force (pull)
Field Strength
Input a number in a box, to see the rest will recalculate in real-time.

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A manual separator is a basic tool for quick identification and sorting of metals. 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.
A neodymium magnet attracts only ferromagnetic metals, such as ordinary steel (black) and cast iron. Lack of reaction (attraction) means the tested item is made of non-magnetic material.
The neodymium model offers powerful force with low weight, which drastically reduces hand fatigue. A lighter tool allows for longer work without wrist and arm pain. 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. 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). 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.

Pros and cons of Nd2Fe14B magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They retain full power for nearly ten years – the drop is just ~1% (in theory),
  • They have excellent resistance to weakening of magnetic properties due to external magnetic sources,
  • Thanks to the elegant finish, the plating of Ni-Cu-Ni, gold, or silver gives an aesthetic appearance,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
  • Thanks to flexibility in shaping and the capacity to modify to client solutions,
  • Significant place in high-tech industry – they are used in data components, drive modules, medical equipment, and complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their force 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 durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum magnetic pulling force – what it depends on?

Information about lifting capacity was defined for ideal contact conditions, assuming:
  • using a base made of mild steel, serving as a magnetic yoke
  • whose transverse dimension reaches at least 10 mm
  • with a surface cleaned and smooth
  • without any clearance between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

Effective lifting capacity impacted by specific conditions, mainly (from priority):
  • Distance (between the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Base massiveness – too thin steel does not accept the full field, causing part of the power to be lost to the other side.
  • Metal type – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
  • Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings
Thermal limits

Avoid heat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Powerful field

Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Fire warning

Machining of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Phone sensors

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Material brittleness

Neodymium magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets will cause them breaking into small pieces.

Crushing risk

Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

No play value

Adult use only. Small elements can be swallowed, leading to serious injuries. Keep away from children and animals.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Electronic hazard

Very strong magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Safety First! More info about hazards in the article: Magnet Safety Guide.