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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

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Specifications and structure of neodymium magnets can be estimated on our online calculation tool.

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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

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: 130350-2025

Quick Unit Converter

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Kilograms (kg)

Newtons (N)

Pounds (lbs)

Field Strength

Induction (Gs)

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. 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 core is a precise magnetic system generating high induction (Gauss). 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.

The Gauss value tells us how effectively and deeply the magnet will catch contaminants. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High induction is necessary when contaminants are microscopic or weakly magnetic.

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.

Strengths as well as weaknesses of rare earth magnets.

Benefits

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

They do not lose power, even after around 10 years – the reduction in power is only ~1% (theoretically),
Neodymium magnets are remarkably resistant to loss of magnetic properties caused by external interference,
The use of an refined coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Magnets possess very high magnetic induction on the outer layer,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
Considering the possibility of accurate forming and adaptation to custom requirements, magnetic components can be modeled in a broad palette of forms and dimensions, which makes them more universal,
Key role in electronics industry – they are commonly used in data components, electromotive mechanisms, medical devices, and other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
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.
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 creating nuts in the magnet and complex shapes - recommended is a housing - magnet mounting.
Health risk related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Highest magnetic holding force – what it depends on?

Breakaway force was defined for optimal configuration, assuming:

on a base made of structural steel, perfectly concentrating the magnetic flux
with a thickness of at least 10 mm
with an ground touching surface
with direct contact (no impurities)
for force acting at a right angle (pull-off, not shear)
at temperature room level

Key elements affecting lifting force

It is worth knowing that the application force will differ influenced by elements below, starting with the most relevant:

Distance – existence of any layer (rust, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Material composition – not every steel reacts the same. Alloy additives worsen the attraction effect.
Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Warnings

Protect data

Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Protective goggles

Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

ICD Warning

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Bone fractures

Danger of trauma: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Do not drill into magnets

Powder created during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Warning for allergy sufferers

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease handling magnets and use protective gear.

Precision electronics

Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your phone, tablet, and GPS.

Do not overheat magnets

Monitor thermal conditions. Exposing the magnet to high heat will ruin its magnetic structure and strength.

Do not give to children

These products are not suitable for play. Swallowing a few magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates immediate surgery.

Handling guide

Handle with care. Rare earth magnets act from a long distance and snap with huge force, often quicker than you can move away.

Danger! Looking for details? Check our post: Are neodymium magnets dangerous?

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

Hunting for a discount?

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

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Environmental data

Force (pull)

Field Strength

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Strengths as well as weaknesses of rare earth magnets.

Benefits

Cons

Lifting parameters

Highest magnetic holding force – what it depends on?

Key elements affecting lifting force

Protect data

Protective goggles

ICD Warning

Bone fractures

Do not drill into magnets

Warning for allergy sufferers

Precision electronics

Do not overheat magnets

Do not give to children

Handling guide

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C