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SM 25x100 [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 130287

GTIN: 5906301812807

5.00

Diameter Ø

25 mm [±1 mm]

Height

100 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

246.00 ZŁ with VAT / pcs + price for transport

200.00 ZŁ net + 23% VAT / pcs

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Weight along with form of neodymium magnets can be reviewed on our magnetic calculator.

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SM 25x100 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x100 [2xM8] / N42 - magnetic separator

properties

properties	values
Cat. no.	130287
GTIN	5906301812807
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	100 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 - 3 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x100 [2xM8] / N42 - magnetic separator

properties	values	units
remenance Br [Min. - Max.] ?	12.9-13.2	kGs
remenance Br [Min. - Max.] ?	1290-1320	T
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 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

Measurement Calculator

Magnet Pull Force

Force in kg

Force (N)

Force in lbs

Magnetic Induction

Induction (T)

Insert a value in a box, to see the rest convert automatically.

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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 outer layer is hygienic acid-resistant steel, approved for food contact. The core is a precise magnetic system generating high induction (Gauss). Such construction ensures full resistance to corrosion, water, oils, and acids.

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. For basic machine protection against pieces of iron, standard power is sufficient. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.

Yes, as a manufacturer, we make rods of any length and diameter (standard is dia 25mm and 32mm). You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Benefits

Apart from their notable magnetic energy, neodymium magnets have these key benefits:

They retain full power for almost ten years – the loss is just ~1% (according to analyses),
They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
A magnet with a metallic gold surface looks better,
Magnets possess excellent magnetic induction on the working surface,
Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
Possibility of exact forming and optimizing to precise conditions,
Significant place in modern technologies – they are used in computer drives, electric drive systems, medical devices, also complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Weaknesses

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in realizing threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
Due to expensive raw materials, their price is relatively high,

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

Breakaway force is the result of a measurement for the most favorable conditions, taking into account:

using a base made of low-carbon steel, serving as a magnetic yoke
with a cross-section no less than 10 mm
with an ideally smooth contact surface
without any clearance between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

It is worth knowing that the application force may be lower subject to the following factors, in order of importance:

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Steel type – mild steel attracts best. Alloy admixtures lower magnetic properties and holding force.
Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets

Operating temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Precision electronics

Note: neodymium magnets generate a field that confuses sensitive sensors. Maintain a separation from your phone, device, and GPS.

Risk of cracking

Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Electronic devices

Powerful magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Fire risk

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Finger safety

Big blocks can smash fingers in a fraction of a second. Never place your hand between two strong magnets.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, immediately stop handling magnets and wear gloves.

Medical implants

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

No play value

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

Respect the power

Handle magnets consciously. Their huge power can surprise even professionals. Be vigilant and do not underestimate their power.

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

SM 25x100 [2xM8] / N42 - magnetic separator

Hunting for a discount?

SM 25x100 [2xM8] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Magnet Pull Force

Magnetic Induction

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SM 25x300 [2xM8] / N42 - magnetic separator

MP 10x4.3x4 / N38 - ring magnet

MPL 20x20x20 / N38 - lamellar magnet

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Weaknesses

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

Determinants of lifting force in real conditions

Operating temperature

Precision electronics

Risk of cracking

Electronic devices

Fire risk

Finger safety

Metal Allergy

Medical implants

No play value

Respect the power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages and disadvantages of Nd₂Fe₁₄B magnets.