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SM 18x275 [2xM5] / 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 130276

GTIN/EAN: 5906301812784

5.00

Diameter Ø

18 mm [±1 mm]

Height

275 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 5 400 Gauss [±5%]

608.85 ZŁ with VAT / pcs + price for transport

495.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Force and form of a neodymium magnet can be calculated using our force calculator.

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SM 18x275 [2xM5] / N42 - magnetic separator

Specification / characteristics SM 18x275 [2xM5] / N42 - magnetic separator

properties

properties	values
Cat. no.	130276
GTIN/EAN	5906301812784
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	18 mm [±1 mm]
Height	275 mm [±1 mm]
Weight	0.01 g
Material Type	Stainless steel AISI 304 / A2
Magnetic Flux	~ 5 400 Gauss [±5%]
Size/Mount Quantity	2xM5
Polarity	circumferential - 12 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 18x275 [2xM5] / 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 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%

Sustainability

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: 130276-2025

Measurement Calculator

Magnet pull force

Kilograms (kg)

lbs

Magnetic Field

Induction (T)

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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. High magnetic induction on the surface allows catching the finest iron particles.

The construction relies on a sealed, welded stainless steel housing, polished smooth. 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.

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. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.

Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. For basic machine protection against pieces of iron, standard power is sufficient. High induction is necessary when contaminants are microscopic or weakly magnetic.

Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. Contact us for a quote on a non-standard dimension.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Apart from their consistent holding force, neodymium magnets have these key benefits:

They have stable power, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
They are resistant to demagnetization induced by presence of other magnetic fields,
Thanks to the smooth finish, the layer of nickel, gold, or silver-plated gives an aesthetic appearance,
Magnetic induction on the surface of the magnet turns out to be very high,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Thanks to the possibility of flexible shaping and customization to unique requirements, magnetic components can be modeled in a broad palette of shapes and sizes, which amplifies use scope,
Universal use in advanced technology sectors – they serve a role in hard drives, electric drive systems, medical devices, as well as modern systems.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in compact constructions

Limitations

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
We recommend cover - magnetic holder, due to difficulties in producing nuts inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to complex production process, their price exceeds standard values,

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

Breakaway force was defined for the most favorable conditions, including:

on a base made of mild steel, optimally conducting the magnetic field
whose thickness reaches at least 10 mm
with a plane cleaned and smooth
under conditions of ideal adhesion (surface-to-surface)
under vertical force vector (90-degree angle)
at room temperature

Impact of factors on magnetic holding capacity in practice

Real force is influenced by working environment parameters, mainly (from most important):

Distance (betwixt the magnet and the plate), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the holding force.

Precautions when working with NdFeB magnets

Power loss in heat

Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its properties and strength.

Protect data

Do not bring magnets near a wallet, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Keep away from children

These products are not toys. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Health Danger

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Risk of cracking

Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Combustion hazard

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Impact on smartphones

An intense magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Keep magnets close to a device to prevent damaging the sensors.

Allergy Warning

A percentage of the population suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause a rash. It is best to use safety gloves.

Caution required

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Crushing risk

Danger of trauma: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Attention! Learn more about hazards in the article: Magnet Safety Guide.

SM 18x275 [2xM5] / N42 - magnetic separator

Can't decide what to choose?

SM 18x275 [2xM5] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Sustainability

Magnet pull force

Magnetic Field

Other offers

MPL 25x10x5 / N38 - lamellar magnet

KM HF - 22 kg - magnetic bracket

MW 4x4 / N38 - cylindrical magnet

SM 25x150 [2xM8] / N42 - magnetic separator

Strengths as well as weaknesses of neodymium magnets.

Advantages

Limitations

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

Impact of factors on magnetic holding capacity in practice

Power loss in heat

Protect data

Keep away from children

Health Danger

Risk of cracking

Combustion hazard

Impact on smartphones

Allergy Warning

Caution required

Crushing risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C