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SM 25x350 [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 130350

GTIN/EAN: 5906301812982

Diameter Ø

25 mm [±1 mm]

Height

350 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

984.00 ZŁ with VAT / pcs + price for transport

800.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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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 otherwise contact us via request form the contact page.
Lifting power as well as form of magnets can be checked with our our magnetic calculator.

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SM 25x350 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x350 [2xM8] / N42 - magnetic separator

properties

properties	values
Cat. no.	130350
GTIN/EAN	5906301812982
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	350 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 - 13 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x350 [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

Technical specification and ecology

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: 130350-2025

Measurement Calculator

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It is the "heart" of every magnetic filter used in industry for cleaning raw materials. 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 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.

Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.

The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. The economical version (8kGs) handles large pieces of metal perfectly. High induction is necessary when contaminants are microscopic or weakly magnetic.

We can produce a rod of non-standard length with any mounting termination. We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. We ensure fast realization of special orders and technical advice.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Benefits

Besides their immense field intensity, neodymium magnets offer the following advantages:

They do not lose magnetism, even after approximately ten years – the reduction in lifting capacity is only ~1% (based on measurements),
They retain their magnetic properties even under strong external field,
Thanks to the glossy finish, the plating of nickel, gold, or silver gives an modern appearance,
Magnets have huge magnetic induction on the active area,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Possibility of individual machining and adjusting to precise conditions,
Versatile presence in modern technologies – they are utilized in data components, brushless drives, precision medical tools, as well as complex engineering applications.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in realizing threads and complex shapes in magnets, we recommend using a housing - magnetic holder.
Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum holding power of the magnet – what affects it?

The load parameter shown concerns the limit force, obtained under laboratory conditions, meaning:

on a plate made of mild steel, effectively closing the magnetic flux
possessing a thickness of at least 10 mm to ensure full flux closure
characterized by even structure
without any insulating layer between the magnet and steel
for force acting at a right angle (in the magnet axis)
at room temperature

Magnet lifting force in use – key factors

Please note that the working load may be lower subject to the following factors, starting with the most relevant:

Distance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
Load vector – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets

Choking Hazard

Neodymium magnets are not intended for children. Accidental ingestion of multiple magnets can lead to them pinching intestinal walls, which poses a critical condition and requires urgent medical intervention.

Magnetic interference

Be aware: rare earth magnets generate a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Medical implants

Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Magnets are brittle

Beware of splinters. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Caution required

Use magnets with awareness. Their huge power can shock even professionals. Plan your moves and respect their force.

Mechanical processing

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Allergy Warning

Some people experience a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling can result in skin redness. We suggest wear protective gloves.

Pinching danger

Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Heat warning

Watch the temperature. Exposing the magnet to high heat will destroy its properties and pulling force.

Electronic hazard

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Safety First! Need more info? Check our post: Why are neodymium magnets dangerous?

SM 25x350 [2xM8] / N42 - magnetic separator

Want to talk magnets?

SM 25x350 [2xM8] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Ecology and recycling (GPSR)

Magnet Pull Force

Magnetic Field

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Pros as well as cons of Nd2Fe14B magnets.

Benefits

Limitations

Lifting parameters

Maximum holding power of the magnet – what affects it?

Magnet lifting force in use – key factors

Choking Hazard

Magnetic interference

Medical implants

Magnets are brittle

Caution required

Mechanical processing

Allergy Warning

Pinching danger

Heat warning

Electronic hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Pros as well as cons of Nd₂Fe₁₄B magnets.