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SM 25x225 [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 130292

GTIN/EAN: 5906301812852

Diameter Ø

25 mm [±1 mm]

Height

225 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

615.00 ZŁ with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Call us +48 22 499 98 98 or contact us using our online form the contact form page.
Parameters along with form of a neodymium magnet can be calculated with our our magnetic calculator.

Orders placed before 14:00 will be shipped the same business day.

SM 25x225 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x225 [2xM8] / N42 - magnetic separator

properties

properties	values
Cat. no.	130292
GTIN/EAN	5906301812852
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	225 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 - 8 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x225 [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

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: 130292-2025

Measurement Calculator

Force (Pull)

Kilograms (kg)

lbs

Magnetic Induction

Gauss (Gs)

Tesla (T)

Input a figure in just one field to get results for the other units immediately.

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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 outer layer is hygienic acid-resistant steel, approved for food contact. 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 contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. You can use compressed air or special non-magnetic strippers (rings). 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. 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). The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Advantages and disadvantages of neodymium magnets.

Advantages

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

Their power is maintained, and after approximately 10 years it drops only by ~1% (according to research),
Magnets effectively defend themselves against loss of magnetization caused by external fields,
In other words, due to the smooth layer of gold, the element gains a professional look,
Magnetic induction on the top side of the magnet remains extremely intense,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of detailed creating and adjusting to specific applications,
Huge importance in modern industrial fields – they find application in hard drives, motor assemblies, advanced medical instruments, also technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend 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 those in rubber or plastics, which prevent oxidation as well as corrosion.
Limited ability of producing threads in the magnet and complex forms - preferred is a housing - magnetic holder.
Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these magnets can complicate diagnosis medical after entering the body.
With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

The load parameter shown refers to the limit force, obtained under optimal environment, namely:

on a plate made of structural steel, effectively closing the magnetic flux
possessing a thickness of min. 10 mm to avoid saturation
characterized by even structure
without the slightest insulating layer between the magnet and steel
under vertical force direction (90-degree angle)
at conditions approx. 20°C

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding will differ depending on elements below, in order of importance:

Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Direction of force – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
Material composition – not every steel reacts the same. Alloy additives weaken the attraction effect.
Surface structure – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets

Do not give to children

Absolutely store magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are tragic.

Finger safety

Watch your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Skin irritation risks

A percentage of the population have a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling may cause an allergic reaction. We strongly advise use safety gloves.

Magnet fragility

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Demagnetization risk

Standard neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Impact on smartphones

Navigation devices and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Protect data

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of at least 10 cm.

Mechanical processing

Powder created during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Safe operation

Be careful. Neodymium magnets attract from a long distance and snap with massive power, often quicker than you can move away.

Danger to pacemakers

Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Warning! More info about risks in the article: Magnet Safety Guide.

SM 25x225 [2xM8] / N42 - magnetic separator

Hunting for a discount?

SM 25x225 [2xM8] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Ecology and recycling (GPSR)

Force (Pull)

Magnetic Induction

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MPL 12x10x4 / N38 - lamellar magnet

UMP 94x28 [3xM10] GW F300 GOLD Lina / N38 - search holder

UMH 60x15x69 [M8] / N38 - magnetic holder with hook

Advantages and disadvantages of neodymium magnets.

Advantages

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Magnet lifting force in use – key factors

Do not give to children

Finger safety

Skin irritation risks

Magnet fragility

Demagnetization risk

Impact on smartphones

Protect data

Mechanical processing

Safe operation

Danger to pacemakers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C