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SM 25x150 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130368

GTIN/EAN: 5906301813163

5.00

Diameter Ø

25 mm [±1 mm]

Height

150 mm [±1 mm]

Weight

560 g

Magnetic Flux

~ 8 500 Gauss [±5%]

467.40 with VAT / pcs + price for transport

380.00 ZŁ net + 23% VAT / pcs

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Specifications as well as form of a neodymium magnet can be checked using our force calculator.

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Technical parameters of the product - SM 25x150 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 25x150 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130368
GTIN/EAN 5906301813163
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 150 mm [±1 mm]
Weight 560 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 500 Gauss [±5%]
Size/Mount Quantity M8x2
Polarity circumferential - 5 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x150 [2xM8] / N52 - magnetic separator
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
SM 25x150 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 25 mm
Total length 150 mm (L)
Active length 114 mm
Section count 4 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~560 g
Active area 90 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)

Chart 2: Field profile (4 sections)

Chart 3: Temperature performance

Technical and environmental data
Material specification
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: 130368-2026
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Pulling force

Magnetic Field

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A magnetic rod is the basic element of building grate separators and magnetic filters. Its task is separation (separation) of metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). 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. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. The economical version (8kGs) handles large pieces of metal perfectly. 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. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Pros and cons of Nd2Fe14B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their power remains stable, and after approximately ten years it drops only by ~1% (according to research),
  • They possess excellent resistance to weakening of magnetic properties when exposed to external fields,
  • In other words, due to the smooth finish of silver, the element is aesthetically pleasing,
  • Magnetic induction on the working layer of the magnet is exceptional,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • In view of the possibility of flexible forming and adaptation to individualized projects, neodymium magnets can be modeled in a wide range of forms and dimensions, which makes them more universal,
  • Versatile presence in high-tech industry – they serve a role in data components, electric drive systems, diagnostic systems, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. 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 force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The force parameter is a measurement result executed under standard conditions:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • with a cross-section of at least 10 mm
  • characterized by even structure
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

In real-world applications, the actual holding force depends on many variables, presented from the most important:
  • Distance – the presence of any layer (rust, tape, gap) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Permanent damage

Watch the temperature. Heating the magnet to high heat will destroy its magnetic structure and strength.

Beware of splinters

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Fire warning

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Implant safety

Patients with a ICD should keep an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Data carriers

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

GPS and phone interference

Remember: rare earth magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, tablet, and navigation systems.

Bone fractures

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Handling rules

Handle magnets consciously. Their immense force can shock even experienced users. Be vigilant and do not underestimate their power.

Danger to the youngest

Only for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Store away from children and animals.

Sensitization to coating

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, prevent touching magnets with bare hands or choose versions in plastic housing.

Warning! More info about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98