Product available Ships tomorrow

SM 25x250 [2xM8] / N42 - magnetic separator

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

magnetic separator

Catalog no 130293

GTIN/EAN: 5906301812869

5.00

Diameter Ø

25 mm [±1 mm]

Height

250 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

688.80 ZŁ with VAT / pcs + price for transport

560.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Pick up the phone and ask +48 22 499 98 98 alternatively get in touch through request form the contact form page.
Weight along with appearance of a magnet can be tested on our force calculator.

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SM 25x250 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x250 [2xM8] / N42 - magnetic separator

properties

properties	values
Cat. no.	130293
GTIN/EAN	5906301812869
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	0.01 g
Material Type	Stainless steel AISI 304 / A2
Magnetic Flux	~ 6 500 Gauss [±5%]
Size/Mount Quantity	2xM8
Polarity	circumferential - 9 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x250 [2xM8] / N42 - magnetic separator

properties	values	units
remenance Br [min. - max.] ?	12.9-13.2	kGs
remenance Br [min. - max.] ?	1290-1320	mT
coercivity bHc ?	10.8-12.0	kOe
coercivity bHc ?	860-955	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	40-42	BH max MGOe
energy density [min. - max.] ?	318-334	BH max KJ/m
max. temperature ?	≤ 80	°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

Engineering data and GPSR

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%

Environmental data

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: 130293-2025

Magnet Unit Converter

Pulling force

Force in kg

Force (N)

Pounds (lbs)

Magnetic Field

Gauss (Gs)

Induction (T)

Simply populate one field, to let the tool compute everything else for you.

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This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is mounted in chutes, hoppers, and pipelines to protect production machines from failure. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.

The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Thanks to this, the rod is durable, hygienic, and easy to keep clean.

Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.

The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. 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.

Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They do not lose magnetism, even during around 10 years – the reduction in strength is only ~1% (according to tests),
Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external interference,
In other words, due to the reflective finish of gold, the element gains a professional look,
Magnets possess extremely high magnetic induction on the outer layer,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to freedom in forming and the capacity to customize to complex applications,
Wide application in modern technologies – they are utilized in hard drives, motor assemblies, medical equipment, and modern systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets: weaknesses and usage proposals

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic mount.
Health risk related to microscopic parts of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical after entering the body.
With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Magnet power was determined for the most favorable conditions, assuming:

using a base made of high-permeability steel, functioning as a ideal flux conductor
with a cross-section of at least 10 mm
with an ground contact surface
without the slightest air gap between the magnet and steel
under perpendicular force vector (90-degree angle)
in stable room temperature

What influences lifting capacity in practice

In practice, the actual lifting capacity results from many variables, listed from the most important:

Clearance – the presence of any layer (paint, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
Angle of force application – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets

No play value

Adult use only. Small elements can be swallowed, causing serious injuries. Keep away from kids and pets.

Magnetic interference

A strong magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Warning for heart patients

People with a heart stimulator must keep an large gap from magnets. The magnetic field can stop the operation of the implant.

Safe operation

Handle magnets with awareness. Their immense force can shock even experienced users. Plan your moves and respect their power.

Shattering risk

NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them cracking into small pieces.

Dust explosion hazard

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Finger safety

Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.

Threat to electronics

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can destroy these devices and wipe information from cards.

Heat warning

Do not overheat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Sensitization to coating

Studies show that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or select coated magnets.

Safety First! Learn more about hazards in the article: Safety of working with magnets.

SM 25x250 [2xM8] / N42 - magnetic separator

Need help making a decision?

SM 25x250 [2xM8] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Environmental data

Pulling force

Magnetic Field

Other deals

MP 20x8/4x5 / N38 - ring magnet

MW 3x2 / N38 - cylindrical magnet

SM 32x175 [2xM8] / N42 - magnetic separator

SM 18x175 [2xM5] / N42 - magnetic separator

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Disadvantages

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

What influences lifting capacity in practice

No play value

Magnetic interference

Warning for heart patients

Safe operation

Shattering risk

Dust explosion hazard

Finger safety

Threat to electronics

Heat warning

Sensitization to coating

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.