← previous
next →
Product available Ships today (order by 14:00)

SM 25x125 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130367

GTIN/EAN: 5906301813156

Diameter Ø

25 mm [±1 mm]

Height

125 mm [±1 mm]

Weight

460 g

Magnetic Flux

~ 8 500 Gauss [±5%]

technical parameters »

418.20 ZŁ with VAT / pcs + price for transport

340.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
340.00 ZŁ
418.20 ZŁ
price from 10 pcs
323.00 ZŁ
397.29 ZŁ
price from 15 pcs
306.00 ZŁ
376.38 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Looking for a better price?

Call us +48 22 499 98 98 or get in touch via contact form the contact section.
Force as well as shape of a magnet can be verified using our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

Product card - SM 25x125 [2xM8] / N52 - magnetic separator

Specification / characteristics - SM 25x125 [2xM8] / N52 - magnetic separator

properties
properties values
Cat. no. 130367
GTIN/EAN 5906301813156
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 125 mm [±1 mm]
Weight 460 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 500 Gauss [±5%]
Size/Mount Quantity M8x2
Polarity circumferential - 4 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x125 [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 25x125 [2xM8] / N52

Parameter Value Description / Unit
Diameter (Ø) 25 mm
Total length 125 mm (L)
Active length 89 mm
Section count 3 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~466 g
Active area 70 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 (3 sections)

Simulation: 3 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical specification and ecology
Elemental analysis
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: 130367-2026
Magnet Unit Converter
Pulling force
Field Strength
Input your value in just one field to see the conversion in the other units at once.

Check out also deals

MW 15x10 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 15x10 / N38 - cylindrical magnet

4.51 ZŁ brutto / pcs
MW 4x5 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 4x5 / N38 - cylindrical magnet

0.320 ZŁ brutto / pcs
MW 10x6 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 10x6 / N38 - cylindrical magnet

1.045 ZŁ brutto / pcs
MW 10x15 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 10x15 / N38 - cylindrical magnet

6.15 ZŁ brutto / pcs
It is the "heart" of every magnetic filter used in industry for cleaning raw materials. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The outer layer is hygienic acid-resistant steel, approved for food contact. 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 contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. 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. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Pros and cons of rare earth magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their magnetic field remains stable, and after around 10 years it decreases only by ~1% (according to research),
  • They possess excellent resistance to magnetism drop due to external fields,
  • In other words, due to the shiny surface of nickel, the element becomes visually attractive,
  • Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • In view of the option of flexible shaping and adaptation to specialized solutions, neodymium magnets can be modeled in a broad palette of forms and dimensions, which makes them more universal,
  • Universal use in innovative solutions – they are utilized in mass storage devices, motor assemblies, precision medical tools, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

What to avoid - cons of neodymium magnets and proposals for their use:
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Limited possibility of producing nuts in the magnet and complex shapes - preferred is cover - magnet mounting.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

The specified lifting capacity concerns the peak performance, recorded under ideal test conditions, specifically:
  • using a plate made of high-permeability steel, serving as a circuit closing element
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an polished touching surface
  • without the slightest insulating layer between the magnet and steel
  • under vertical force direction (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

Effective lifting capacity is influenced by specific conditions, mainly (from most important):
  • Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.

Safe handling of NdFeB magnets
Warning for heart patients

Individuals with a heart stimulator have to keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Swallowing risk

Always keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are fatal.

Impact on smartphones

A powerful magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.

Handling guide

Handle magnets consciously. Their powerful strength can shock even experienced users. Plan your moves and do not underestimate their power.

Physical harm

Protect your hands. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!

Do not overheat magnets

Watch the temperature. Heating the magnet to high heat will ruin its properties and pulling force.

Machining danger

Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Magnet fragility

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

Keep away from computers

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can destroy these devices and wipe information from cards.

Sensitization to coating

It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands and opt for encased magnets.

Important! Want to know more? Check our post: Why are neodymium magnets dangerous?