FAQ
Order Status

tel: +48 22 499 98 98

neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our store's offer. All magnesy in our store are in stock for immediate purchase (check the list). Check out the magnet pricing for more details check the magnet price list

Magnets for treasure hunters F200 GOLD

Where to buy powerful neodymium magnet? Magnetic holders in airtight, solid steel casing are perfect for use in difficult, demanding weather, including during snow and rain more information...

magnets with holders

Holders with magnets can be used to enhance production processes, underwater exploration, or searching for meteorites made of ore see more...

Enjoy shipping of your order on the day of purchase by 2:00 PM on weekdays.

Dhit sp. z o.o. logo
0
0.00 PLN
  1. home
  2. magnetic rollers separators
  3. powerful, practical magnetic roller sm 19x225 [2xm6] / n50
next →
Product available shipping in 3 days!

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

magnetic separator

catalog number 130241

GTIN: 5906301812708

5.0

diameter Ø

19 mm [±0,1 mm]

height

225 mm [±0,1 mm]

max. temperature

≤ 80 °C

492.00 ZŁ gross price (including VAT) / pcs +

400.00 ZŁ net price + 23% VAT / pcs

bulk discounts:

need more quantity?
price from 1 pcs
400.00 ZŁ
492.00 ZŁ
price from 6 pcs
380.00 ZŁ
467.40 ZŁ
price from 11 pcs
360.00 ZŁ
442.80 ZŁ

Do you have doubts?

Give us a call tel: +48 22 499 98 98 or contact us through contact form on the contact page. You can check the mass and the appearance of magnet in our force calculator power calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: magnetic separator 19x225 [2xM6] / N50

Characteristics: magnetic separator 19x225 [2xM6] / N50
Properties
Values
catalog number
130241
GTIN
5906301812708
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
19 mm [±0,1 mm]
height
225 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
0.01 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N50
ilość gwintów
2x [M6] wewnętrzne
biegunowość
obwodowa - 12 nabiegunników
indukcja magnetyczna
~ 12 000 Gauss [±5%]
max. temp. pracy
poniżej ≤ 80°C
grubość rury osłonowej
0.5 mm

Magnetic properties of the material N50

material characteristics N50
Properties
Values
units
remenance Br [Min. - Max.] ?
14-14.6
kGs
remenance Br [Min. - Max.] ?
1400-1460
T
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.]
47-51
BH max MGOe
energy density [Min. - Max.]
374-406
BH max KJ/m
max. temperature
≤ 80
°C

Physical properties of sintered neodymium magnets Nd2Fe14B

Physical properties of sintered neodymium magnets Nd2Fe14B
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
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. As a result, it is possible to effectively segregate ferromagnetic particles from different substances. A fundamental component of its operation is the repulsion of magnetic poles N and S, which allows magnetic substances to be attracted. The thickness of the embedded magnet and its structure's pitch affect the power and range of the separator's operation.
Generally speaking, magnetic separators serve to segregate ferromagnetic elements. If the cans are ferromagnetic, a magnetic separator will be effective. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the magnetic separator will not be effective.
Yes, magnetic rollers are used in food production for the elimination of metallic contaminants, including iron fragments or iron dust. Our rollers are built from durable acid-resistant steel, EN 1.4301, intended for contact with food.
Magnetic rollers, otherwise cylindrical magnets, find application in food production, metal separation as well as recycling. They help in eliminating iron dust in the course of the process of separating metals from other materials.
Our magnetic rollers are built with neodymium magnets anchored in a tube of stainless steel with a wall thickness of 1mm.
From both sides of the magnetic bar can be with M8 threaded openings, which enables simple mounting in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.
In terms of features, magnetic bars stand out in terms of flux density, magnetic force lines and the area of operation of the magnetic field. We produce them in two materials, N42 as well as N52.
Usually it is believed that the greater the magnet's power, the more effective. But, the strength of the magnet's power is dependent 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.
When the magnet is thin, the magnetic force lines will be short. By contrast, in the case of a thicker magnet, the force lines are extended and reach further.
For constructing the casings of magnetic separators - rollers, usually stainless steel is utilized, especially types AISI 316, AISI 316L, and AISI 304.
In a salt water environment, AISI 316 steel is recommended due to its outstanding corrosion resistance.
Magnetic rollers stand out for their specific arrangement of poles and their ability to attract magnetic substances 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 polarity, magnetic induction, magnet pitch, 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, aiming to find the highest magnetic field value near the magnetic pole. The outcome is checked in a value table - the lowest is N30. All designations below N27 or N25 suggest recycling that falls below the standard - they are not suitable.
Neodymium magnetic bars offer many advantages, including a very strong magnetic field, the ability to capture even the tiniest metal particles, 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 washing after each use, avoiding temperatures above 80 degrees. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can rust and weaken. Magnetic field measurements is recommended be carried out once every 24 months. Care should be taken, as it’s possible 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 range of the roller corresponds 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 metal separation is crucial.

Recommended articles for purchase

cylindrical magnetic holder 16x5/2x5 / N38
Product available shipping in 3 days!

cylindrical magnetic holder 16x5/2x5 / N38

3.33 ZŁ / pcs
conical magnetic holder 25x10.5x5.5x8 / N38 ↑ axial
Product available shipping in 3 days!

conical magnetic holder 25x10.5x5.5x8 / N38 ↑ axial

9.72 ZŁ / pcs
magnetic separator 18x125 [2xM5] / N42
Product available shipping in 3 days!

magnetic separator 18x125 [2xM5] / N42

276.75 ZŁ / pcs
ring magnet 20x8/4x5 / N38 ↑ axial
Product available shipping in 3 days!

ring magnet 20x8/4x5 / N38 ↑ axial

7.75 ZŁ / pcs

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

  • They do not lose their power (of the magnet). After about 10 years, their strength decreases by only ~1% (theoretically),
  • They are exceptionally resistant to demagnetization caused by an external magnetic field,
  • In other words, thanks to the shiny nickel, gold, or silver finish, the element gains an visually attractive appearance,
  • They possess very high magnetic induction on the surface of the magnet,
  • Magnetic neodymium magnets are characterized by hugely high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
  • Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in various forms and dimensions, which expands the range of their possible uses.
  • Significant importance in advanced technologically fields – are used in HDD drives, electric motors, medical equipment and various technologically advanced devices.

Disadvantages of neodymium magnets:

  • They can break as they are extremely fragile when subjected to a strong impact. If the magnets are exposed to impacts, it is suggested using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts and simultaneously increases its overall strength,
  • High temperatures can reduce the strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent reduction in strength (although it is dependent on the form and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
  • They rust in a humid environment - during outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
  • Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
  • Potential hazard arising from small pieces of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting young children. Furthermore, miniscule components of these magnets can hinder the diagnostic process when they are in the body.

Handle with Care: Neodymium Magnets

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.

Neodymium magnets can become demagnetized at high temperatures.

Despite the general resilience of magnets, 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.

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

Magnets will attract each other within a distance of several to about 10 cm from each other. Don't put your fingers in the path of magnet attraction, as a major injury may occur. Depending on how massive the neodymium magnets are, they can lead to a cut or alternatively a fracture.

Neodymium magnets are the most powerful magnets ever invented. Their strength can shock you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Neodymium magnetic are noted for their fragility, which can cause them to become damaged.

Magnets made of neodymium are delicate as well as will crack if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

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

Studies clearly indicate a small percentage of people who suffer from metal allergies such as 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.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

 It is essential to keep neodymium magnets out of reach from children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Keep neodymium magnets away from TV, wallet, and computer HDD.

Strong fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Avoid bringing neodymium magnets close to a phone or GPS.

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

To raise awareness of why neodymium magnets are so dangerous, see the article titled How very dangerous are strong neodymium magnets?.
Dhit sp. z o.o. logo

e-mail: bok@dhit.pl

tel: +48 888 99 98 98