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SM 25x200 [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 130291

GTIN: 5906301812845

Diameter Ø

25 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

541.20 ZŁ with VAT / pcs + price for transport

440.00 ZŁ net + 23% VAT / pcs

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Force and structure of magnetic components can be checked using our force calculator.

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SM 25x200 [2xM8] / N42 - magnetic separator

Specification / characteristics SM 25x200 [2xM8] / N42 - magnetic separator

properties

properties	values
Cat. no.	130291
GTIN	5906301812845
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	200 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 - 7 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x200 [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

Pulling Force

Force in kg

lbs

Magnetic Induction

Tesla (T)

Input a figure in a single field to receive results in all other fields at once.

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

The construction relies on a sealed, welded stainless steel housing, polished smooth. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Thanks to this, the rod is durable, hygienic, and easy to keep clean.

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 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 Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.

We can produce a rod of non-standard length with any mounting termination. 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 rare earth magnets.

Benefits

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

They do not lose magnetism, even during nearly ten years – the decrease in lifting capacity is only ~1% (based on measurements),
Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
A magnet with a smooth gold surface has better aesthetics,
The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to flexibility in forming and the capacity to customize to unusual requirements,
Huge importance in modern industrial fields – they are utilized in computer drives, electric motors, diagnostic systems, also multitasking production systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets and proposals for their use:

At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 immune to moisture, when using outdoors
We suggest cover - magnetic holder, due to difficulties in producing threads inside the magnet and complex forms.
Possible danger 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 components of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to neodymium price, their price is relatively high,

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

The lifting capacity listed is a theoretical maximum value executed under standard conditions:

using a sheet made of low-carbon steel, acting as a ideal flux conductor
with a cross-section no less than 10 mm
with a surface cleaned and smooth
without the slightest clearance between the magnet and steel
for force applied at a right angle (in the magnet axis)
at room temperature

What influences lifting capacity in practice

In practice, the real power results from many variables, presented from most significant:

Clearance – existence of any layer (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Load vector – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
Steel type – low-carbon steel gives the best results. Higher carbon content lower magnetic permeability and holding force.
Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.

Warnings

Conscious usage

Use magnets with awareness. Their huge power can shock even professionals. Be vigilant and do not underestimate their power.

Warning for heart patients

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Do not drill into magnets

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Crushing force

Risk of injury: The pulling power is so immense that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Data carriers

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

Fragile material

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Heat sensitivity

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Choking Hazard

Always keep magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are tragic.

Precision electronics

An intense magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.

Nickel allergy

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, cease working with magnets and use protective gear.

Security! Looking for details? Read our article: Are neodymium magnets dangerous?

SM 25x200 [2xM8] / N42 - magnetic separator

Can't decide what to choose?

SM 25x200 [2xM8] / N42 - magnetic separator

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Pulling Force

Magnetic Induction

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SM 32x475 [2xM8] / N52 - magnetic separator

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MW 15x5 / N38 - cylindrical magnet

UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder

Advantages and disadvantages of rare earth magnets.

Benefits

Weaknesses

Lifting parameters

Maximum lifting capacity of the magnet – what it depends on?

What influences lifting capacity in practice

Conscious usage

Warning for heart patients

Do not drill into magnets

Crushing force

Data carriers

Fragile material

Heat sensitivity

Choking Hazard

Precision electronics

Nickel allergy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C