Product available Ships tomorrow

SM 25x300 [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 130295

GTIN/EAN: 5906301812883

5.00

Diameter Ø

25 mm [±1 mm]

Height

300 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 6 500 Gauss [±5%]

836.40 ZŁ with VAT / pcs + price for transport

680.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

680.00 ZŁ

836.40 ZŁ

price from 5 pcs

646.00 ZŁ

794.58 ZŁ

price from 10 pcs

612.00 ZŁ

752.76 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need advice?

Call us +48 22 499 98 98 alternatively let us know through our online form the contact page.
Weight as well as appearance of magnets can be calculated on our modular calculator.

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

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

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

properties

properties	values
Cat. no.	130295
GTIN/EAN	5906301812883
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	300 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 - 11 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics SM 25x300 [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

Technical and environmental data

Chemical composition

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: 130295-2025

Quick Unit Converter

Force (pull)

Force in lbs

Magnetic Field

Gauss (Gs)

Induction (T)

Simply fill in any input, and the converter compute the rest automatically.

Other offers

Product available Ships tomorrow

MW 12x50 / N38 - cylindrical magnet

28.29 ZŁ brutto / pcs

Product available Ships tomorrow

SMZR 25x250 / N52 - magnetic separator with handle

676.50 ZŁ brutto / pcs

Product available Ships tomorrow

MW 4x6 / N38 - cylindrical magnet

0.381 ZŁ brutto / pcs

Product available Ships tomorrow

BM 380x180x70 [4x M8] - magnetic beam

4185.08 ZŁ brutto / pcs

This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.

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. Thanks to this, the rod is durable, hygienic, and easy to keep clean.

Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. 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 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). The rod end is strictly adapted to the fastening system in your device. Contact us for a quote on a non-standard dimension.

Pros as well as cons of rare earth magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They retain attractive force for almost ten years – the drop is just ~1% (in theory),
They are extremely resistant to demagnetization induced by presence of other magnetic fields,
A magnet with a shiny nickel surface has an effective appearance,
Magnetic induction on the working part of the magnet turns out to be strong,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
Due to the ability of accurate molding and customization to unique needs, magnetic components can be created in a wide range of geometric configurations, which amplifies use scope,
Fundamental importance in high-tech industry – they are utilized in magnetic memories, electromotive mechanisms, precision medical tools, as well as multitasking production systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as 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 oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing threads and complicated forms in magnets, we recommend using a housing - magnetic mechanism.
Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis 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

Maximum magnetic pulling force – what contributes to it?

The lifting capacity listed is a theoretical maximum value performed under specific, ideal conditions:

with the application of a yoke made of special test steel, ensuring full magnetic saturation
possessing a massiveness of at least 10 mm to ensure full flux closure
with a plane perfectly flat
under conditions of no distance (metal-to-metal)
under vertical application of breakaway force (90-degree angle)
at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

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

Clearance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Warnings

Safe distance

Equipment safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, medical aids, mechanical watches).

GPS and phone interference

A powerful magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to avoid damaging the sensors.

Warning for heart patients

People with a ICD have to keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.

Dust explosion hazard

Dust produced during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Heat sensitivity

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.

Do not underestimate power

Handle with care. Neodymium magnets act from a long distance and connect with massive power, often faster than you can react.

Magnets are brittle

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.

Avoid contact if allergic

Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, avoid direct skin contact or select encased magnets.

Do not give to children

NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them pinching intestinal walls, which constitutes a critical condition and requires immediate surgery.

Finger safety

Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

Important! Learn more about hazards in the article: Safety of working with magnets.

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

Need advice?

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

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

Other offers

MW 12x50 / N38 - cylindrical magnet

SMZR 25x250 / N52 - magnetic separator with handle

MW 4x6 / N38 - cylindrical magnet

BM 380x180x70 [4x M8] - magnetic beam

Pros as well as cons of rare earth magnets.

Strengths

Disadvantages

Lifting parameters

Maximum magnetic pulling force – what contributes to it?

Lifting capacity in real conditions – factors

Safe distance

GPS and phone interference

Warning for heart patients

Dust explosion hazard

Heat sensitivity

Do not underestimate power

Magnets are brittle

Avoid contact if allergic

Do not give to children

Finger safety

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C