← previous

Product available shipping tomorrow

SM 25x325 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130370

GTIN: 5906301813187

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

325 mm

Weight

0.01 g

984.00 ZŁ with VAT / pcs + price for transport

800.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

800.00 ZŁ

984.00 ZŁ

price from 5 pcs

760.00 ZŁ

934.80 ZŁ

price from 10 pcs

720.00 ZŁ

885.60 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Pick up the phone and ask +48 888 99 98 98 alternatively let us know through inquiry form through our site.
Specifications as well as form of neodymium magnets can be checked on our our magnetic calculator.

Same-day shipping for orders placed before 14:00.

SM 25x325 [2xM8] / N52 - magnetic separator

Specification/characteristics SM 25x325 [2xM8] / N52 - magnetic separator

properties

values

Cat. no.

130370

GTIN

5906301813187

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

25 mm [±0,1 mm]

Height

325 mm [±0,1 mm]

Weight

0.01 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N52

properties

values

units

remenance Br [Min. - Max.] ?

14.2-14.7

kGs

remenance Br [Min. - Max.] ?

1420-1470

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 NdFeB

properties

values

units

Vickers hardness

≥550

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

Shopping tips

Product available wysyłka jutro!

UMT 11x17 colorless / N38 - board holder

1.538 ZŁ / pcs

Product available wysyłka jutro!

MW 22x6 / N38 - cylindrical magnet

6.11 ZŁ / pcs

Product available wysyłka jutro!

UI 33x13x4 [C311] / N38 - badge holder

2.40 ZŁ / pcs

Product available wysyłka jutro!

UMC 42x7/4x9 / N38 - cylindrical magnetic holder

29.99 ZŁ / pcs

The main mechanism of the magnetic separator is the use of neodymium magnets, which are embedded in a casing made of stainless steel mostly AISI304. In this way, it is possible to efficiently remove ferromagnetic particles from other materials. A fundamental component of its operation is the repulsion of N and S poles of neodymium magnets, which causes magnetic substances to be targeted. The thickness of the embedded magnet and its structure's pitch determine the range and strength of the separator's operation.

Generally speaking, magnetic separators are used to extract ferromagnetic elements. If the cans are made of ferromagnetic materials, the separator will effectively segregate them. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the magnetic separator will not be effective.

Yes, magnetic rollers are employed in the food sector for the elimination of metallic contaminants, such as iron fragments or iron dust. Our rods are built from durable acid-resistant steel, EN 1.4301, approved for contact with food.

Magnetic rollers, otherwise magnetic separators, are employed in metal separation, food production as well as recycling. They help in eliminating iron dust during the process of separating metals from other materials.

Our magnetic rollers consist of a neodymium magnet placed in a tube made of stainless steel with a wall thickness of 1mm.

Both ends of the magnetic bar can be with M8 threaded holes - 18 mm, enabling quick installation in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of features, magnetic bars differ in terms of magnetic force lines, flux density and the field of the magnetic field. We produce them in materials, N42 as well as N52.

Usually it is believed that the greater the magnet's power, the more efficient it is. But, the effectiveness of the magnet's power depends on the height of the used magnet and the quality of the material [N42] or [N52], as well as on the area of use and specific needs. The standard operating temperature of a magnetic bar is 80°C.

In the case where the magnet is thin, the magnetic force lines are short. Otherwise, when the magnet is thick, the force lines are extended and extend over a greater distance.

For making the casings of magnetic separators - rollers, most often stainless steel is employed, particularly types AISI 304, AISI 316, and AISI 316L.

In a saltwater contact, type AISI 316 steel is highly recommended thanks to its excellent corrosion resistance.

Magnetic bars are characterized by their unique configuration of poles and their ability to attract magnetic particles directly onto their surface, as opposed to other separators that often use complex filtration systems.

Technical designations and terms related to magnetic separators comprise amongst others magnet pitch, polarity, and magnetic induction, as well as the steel type applied.

Magnetic induction for a roller is determined using a teslameter or a gaussmeter with a flat Hall-effect probe, seeking the highest magnetic field value near the magnetic pole. The outcome is verified in a value table - the lowest is N30. All designations less than N27 or N25 suggest recycling that falls below the standard - they are not suitable.

Neodymium magnetic rollers offer a range of benefits such as excellent separation efficiency, strong magnetic field, and durability. Disadvantages may include the need for regular cleaning, higher cost, and potential installation challenges.

To properly maintain of neodymium magnetic rollers, it’s worth they should be regularly cleaned, avoiding temperatures above 80 degrees. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and weaken. Testing of the rollers should be carried out once every 24 months. Care should be taken, as there is a risk getting pinched. If the protective tube is only 0.5 mm thick, it may wear out, which in turn could cause problems with the magnetic rod seal and product contamination. The effective range of the roller is equal to its diameter: fi25mm gives an active range of about 25mm, while fi32 gives an active range of about 40mm.

Magnetic rollers are cylindrical neodymium magnets placed in a casing made of corrosion-resistant stainless steel, used for separating ferromagnetic contaminants from raw materials. They are applied in industries such as food processing, ceramics, and recycling, where the removal of iron metals and iron filings is essential.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their exceptional strength, neodymium magnets offer the following advantages:

Their strength is durable, and after around ten years, it drops only by ~1% (theoretically),
They protect against demagnetization induced by external electromagnetic environments very well,
Thanks to the glossy finish and gold coating, they have an elegant appearance,
Magnetic induction on the surface of these magnets is impressively powerful,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
Thanks to the freedom in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in different geometries, which expands their application range,
Wide application in cutting-edge sectors – they serve a purpose in data storage devices, electromechanical systems, clinical machines along with technologically developed systems,
Relatively small size with high magnetic force – neodymium magnets offer strong power in tiny dimensions, which allows for use in small systems

Disadvantages of neodymium magnets:

They can break when subjected to a powerful impact. If the magnets are exposed to mechanical hits, it is suggested to place them in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and reinforces its overall strength,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent decline in performance (depending on height). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
They rust in a moist environment, especially when used outside, we recommend using waterproof magnets, such as those made of non-metallic materials,
The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is not feasible,
Possible threat due to small fragments may arise, when consumed by mistake, which is significant in the family environments. Additionally, minuscule fragments from these devices may complicate medical imaging when ingested,
Due to the price of neodymium, their cost is considerably higher,

Maximum lifting force for a neodymium magnet – what it depends on?

The given pulling force of the magnet represents the maximum force, assessed in ideal conditions, namely:

using a steel plate with low carbon content, acting as a magnetic circuit closure
having a thickness of no less than 10 millimeters
with a smooth surface
in conditions of no clearance
under perpendicular detachment force
at room temperature

Practical lifting capacity: influencing factors

The lifting capacity of a magnet is determined by in practice the following factors, according to their importance:

Air gap between the magnet and the plate, as even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate lowers the load capacity.

Handle with Care: Neodymium Magnets

Neodymium magnets are the strongest magnets ever created, and their power can shock you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

Neodymium magnets jump and clash mutually within a distance of several to around 10 cm from each other.

Magnets should not be treated as toys. Therefore, it is not recommended for children to have access to them.

Not all neodymium magnets are toys, so do not let children play with them. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

Avoid bringing neodymium magnets close to a phone or GPS.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are known for being fragile, which can cause them to crumble.

Neodymium magnets are characterized by considerable fragility. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

You should maintain neodymium magnets at a safe distance from the wallet, computer, and TV.

Neodymium magnets produce intense magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets are generally resilient, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

The magnet is coated with nickel - be careful if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Warning!

So you are aware of why neodymium magnets are so dangerous, see the article titled How dangerous are strong neodymium magnets?.