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SM 25x175 [2xM8] / N52 - 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 130369

GTIN/EAN: 5906301813170

Diameter Ø

25 mm [±1 mm]

Height

175 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

541.20 ZŁ with VAT / pcs + price for transport

440.00 ZŁ net + 23% VAT / pcs

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Force as well as form of a neodymium magnet can be checked using our magnetic calculator.

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SM 25x175 [2xM8] / N52 - magnetic separator

Specification / characteristics SM 25x175 [2xM8] / N52 - magnetic separator

properties

properties	values
Cat. no.	130369
GTIN/EAN	5906301813170
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	175 mm [±1 mm]
Weight	0.01 g
Material Type	Stainless steel AISI 304 / A2
Magnetic Flux	~ 9 500 Gauss [±5%]
Size/Mount Quantity	2xM8
Polarity	circumferential - 6 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N52

Specification / characteristics SM 25x175 [2xM8] / N52 - magnetic separator

properties	values	units
remenance Br [Min. - Max.] ?	14.2-14.7	kGs
remenance Br [Min. - Max.] ?	1420-1470	T
coercivity bHc ?	10.8-12.5	kOe
coercivity bHc ?	860-995	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [Min. - Max.] ?	48-53	BH max MGOe
energy density [Min. - Max.] ?	380-422	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 106	°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

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%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

{Safety card (GPSR)|Safety information|GPSR compliance}

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: kontakt@dhit.pl

batch number/type

id: 130369-2025

Measurement Calculator

Magnet Pull Force

Force (N)

Force in lbs

Field Strength

Induction (Gs)

Tesla (T)

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

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A magnetic rod is the basic element of building grate separators and magnetic filters. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. 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. The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Such construction ensures full resistance to corrosion, water, oils, and acids.

Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. You can use compressed air or special non-magnetic strippers (rings). 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. For basic machine protection against pieces of iron, standard power is sufficient. High induction is necessary when contaminants are microscopic or weakly magnetic.

We can produce a rod of non-standard length with any mounting termination. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
Neodymium magnets remain exceptionally resistant to loss of magnetic properties caused by external field sources,
Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
They show high magnetic induction at the operating surface, which improves attraction properties,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
Thanks to versatility in constructing and the ability to modify to unusual requirements,
Significant place in future technologies – they serve a role in computer drives, drive modules, medical devices, also modern systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: tips and applications.

At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
We recommend a housing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated forms.
Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Holding force of 0.00 kg is a result of laboratory testing performed under the following configuration:

using a sheet made of low-carbon steel, acting as a circuit closing element
possessing a massiveness of at least 10 mm to ensure full flux closure
with an ideally smooth contact surface
without the slightest insulating layer between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at room temperature

Lifting capacity in practice – influencing factors

Holding efficiency is affected by specific conditions, mainly (from most important):

Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Thermal environment – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Safety rules for work with neodymium magnets

GPS Danger

GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Protect data

Data protection: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

This is not a toy

Only for adults. Small elements pose a choking risk, causing serious injuries. Store out of reach of children and animals.

Serious injuries

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Respect the power

Exercise caution. Neodymium magnets act from a long distance and connect with huge force, often faster than you can react.

Allergic reactions

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and use protective gear.

Magnet fragility

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets leads to them breaking into small pieces.

Permanent damage

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Pacemakers

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Mechanical processing

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Danger! More info about hazards in the article: Safety of working with magnets.

SM 25x175 [2xM8] / N52 - magnetic separator

Can't decide what to choose?

SM 25x175 [2xM8] / N52 - magnetic separator

Magnetic properties of material N52

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Sustainability

Magnet Pull Force

Field Strength

Other proposals

UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

MW 22x10 / N38 - cylindrical magnet

MW 70x30 / N38 - cylindrical magnet

MW 2x4 / N38 - cylindrical magnet

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Cons

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Lifting capacity in practice – influencing factors

GPS Danger

Protect data

This is not a toy

Serious injuries

Respect the power

Allergic reactions

Magnet fragility

Permanent damage

Pacemakers

Mechanical processing

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths and weaknesses of Nd₂Fe₁₄B magnets.