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SMZR 25x250 / N52 - magnetic separator with handle

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 with handle

Catalog no 140236

GTIN/EAN: 5906301813446

5.00

Diameter Ø

25 mm [±1 mm]

Height

250 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

676.50 ZŁ with VAT / pcs + price for transport

550.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Pick up the phone and ask +48 888 99 98 98 otherwise contact us via our online form the contact section.
Parameters along with form of magnets can be calculated on our power calculator.

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SMZR 25x250 / N52 - magnetic separator with handle

Specification / characteristics SMZR 25x250 / N52 - magnetic separator with handle

properties

properties	values
Cat. no.	140236
GTIN/EAN	5906301813446
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	250 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 - 9 poles
Casing Tube Thickness	1 mm
Manufacturing Tolerance	±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x250 / N52 - magnetic separator with handle

properties	values	units
remenance Br [min. - max.] ?	14.2-14.7	kGs
remenance Br [min. - max.] ?	1420-1470	mT
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 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

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%

Environmental data

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: 140236-2025

Measurement Calculator

Pulling force

Newtons (N)

Force in lbs

Magnetic Induction

Input a figure in a single field to get results in all other fields immediately.

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This gripper serves for instant distinction of steel (iron) from non-ferrous metals. It allows checking if a given item is ferromagnetic (steel, cast iron) or not (aluminum, copper, stainless steel). It is also useful for pulling small steel elements from crates, ash, sand, or sawdust.

The tool reacts to carbon steel but does not attract most stainless steels (austenitic, like AISI 304). If the magnet does not attract the tested element, it is probably non-ferrous metal or acid-resistant steel.

Neodymiums are more compact and effective during all-day work at a scrap yard. A lighter tool allows for longer work without wrist and arm pain. This is a modern solution displacing heavy and weak ferrite magnets.

The construction consists of a hermetic can protecting the magnet and an ergonomic handle. A solid handle (wooden, rubber, or plastic) ensures a firm and comfortable grip. Thanks to such an armored build, the separator is resistant to difficult conditions prevailing at a scrap yard.

It is a simple and reliable construction without moving parts, so cleaning consists of removing scrap. We also offer versions where pulling the handle automatically drops collected material. The sliding technique is more effective and requires less force than perpendicular tearing.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:

They retain attractive force for around 10 years – the drop is just ~1% (according to analyses),
They maintain their magnetic properties even under external field action,
Thanks to the shiny finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an professional appearance,
The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to flexibility in forming and the capacity to customize to specific needs,
Wide application in modern industrial fields – they are commonly used in computer drives, electric motors, medical equipment, as well as industrial machines.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Limited possibility of producing nuts in the magnet and complicated forms - recommended is cover - mounting mechanism.
Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

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

Information about lifting capacity was determined for optimal configuration, including:

on a plate made of mild steel, perfectly concentrating the magnetic flux
with a cross-section of at least 10 mm
with a surface cleaned and smooth
without any air gap between the magnet and steel
under vertical force direction (90-degree angle)
at standard ambient temperature

Determinants of lifting force in real conditions

Bear in mind that the application force will differ depending on elements below, in order of importance:

Distance (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
Plate thickness – too thin plate causes magnetic saturation, causing part of the flux to be lost into the air.
Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
Temperature – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets

Flammability

Fire hazard: Neodymium dust is explosive. Avoid machining magnets in home conditions as this risks ignition.

Implant safety

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

Allergy Warning

It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.

Do not underestimate power

Be careful. Rare earth magnets act from a distance and snap with huge force, often faster than you can move away.

GPS and phone interference

A strong magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Maximum temperature

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Protective goggles

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

Crushing risk

Danger of trauma: The attraction force is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Electronic hazard

Powerful magnetic fields can destroy records on payment cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Danger to the youngest

Neodymium magnets are not intended for children. Eating several magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires immediate surgery.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?

SMZR 25x250 / N52 - magnetic separator with handle

Want to talk magnets?

SMZR 25x250 / N52 - magnetic separator with handle

Magnetic properties of material N52

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Environmental data

Pulling force

Magnetic Induction

Other products

SM 19x225 [2xM6] / N50 - magnetic separator

MPL 20x5x3 / N38 - lamellar magnet

UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

Advantages and disadvantages of rare earth magnets.

Pros

Weaknesses

Lifting parameters

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

Determinants of lifting force in real conditions

Flammability

Implant safety

Allergy Warning

Do not underestimate power

GPS and phone interference

Maximum temperature

Protective goggles

Crushing risk

Electronic hazard

Danger to the youngest

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C