tel: +48 888 99 98 98

neodymium magnets

We offer red color magnets Nd2Fe14B - our proposal. Practically all "neodymium magnets" on our website are available for immediate purchase (check the list). See the magnet price list for more details check the magnet price list

Magnets for water searching F300 GOLD

Where to purchase powerful magnet? Magnet holders in solid and airtight steel enclosure are perfect for use in difficult, demanding weather, including during rain and snow more...

magnets with holders

Holders with magnets can be used to enhance production, underwater exploration, or searching for meteors from gold more information...

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

Dhit sp. z o.o. logo
Product available shipping tomorrow!

SM 32x275 [2xM8] / N52 - magnetic roller

magnetic separator

catalog number 130458

GTIN: 5906301813293

no reviews

diameter Ø

32 mm [±0,1 mm]

height

275 mm [±0,1 mm]

max. temperature

≤ 80 °C

897.90 PLN gross price (including VAT) / pcs +

730.00 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs
730.00 PLN
897.90 PLN
price from 4 pcs
693.50 PLN
853.00 PLN
price from 7 pcs
657.00 PLN
808.11 PLN

Want to bargain?

Call us tel: +48 22 499 98 98 or write through contact form on the contact page. You can check the strength as well as the appearance of magnet in our force calculator force calculator

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

Specification: magnetic separator 32x275 [2xM8] / N52

Characteristics: magnetic separator 32x275 [2xM8] / N52
Properties
Values
catalog number
130458
production / distribution
Dhit sp. z o.o.
country of origin
Poland / China / Germany
customs code
85059029
diameter Ø
32 mm [±0,1 mm]
height
275 mm [±0,1 mm]
max. temperature ?
≤ 80 °C
weight
1520.00 g
execution tolerance
± 0.1 mm
rodzaj materiału
AISI 304 - bezpieczna dla żywności
rodzaj magnesów
NdFeB N52
ilość gwintów
2x [M8] wewnętrzne
biegunowość
obwodowa - 10 nadbiegunników
indukcja magnetyczna
~ 10 000 Gauss [±5%]
max. temp. pracy
poniżej ≤ 80°C
grubość rury osłonowej
1 mm

Magnetic properties of the material N52

material characteristics N52
Properties
Values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
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.]
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

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, placed in a casing made of stainless steel usually AISI304. Due to this, it is possible to precisely separate ferromagnetic elements from different substances. A fundamental component of its operation is the use of repulsion of N and S poles of neodymium magnets, which allows magnetic substances to be attracted. The thickness of the magnet and its structure pitch determine the range and strength of the separator's operation.
Generally speaking, magnetic separators are used to segregate ferromagnetic particles. If the cans are ferromagnetic, the separator will effectively segregate them. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the separator will not effectively segregate them.
Yes, magnetic rollers are used in the food industry for the elimination of metallic contaminants, including iron fragments or iron dust. Our rollers are constructed from durable acid-resistant steel, AISI 304, suitable for contact with food.
Magnetic rollers, otherwise magnetic separators, are employed in metal separation, food production as well as waste processing. They help in removing iron dust in the course of the process of separating metals from other wastes.
Our magnetic rollers are built with neodymium magnets embedded in a tube of stainless steel with a wall thickness of 1mm.
Both ends of the magnetic bar will 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 stand out in terms of magnetic force lines, flux density and the area of operation of the magnetic field. We produce them in two materials, N42 as well as N52.
Generally it is believed that the stronger the magnet, the more efficient it is. However, the value of the magnet's power is based 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 anticipated needs. The standard operating temperature of a magnetic bar is 80°C.
If the magnet is more flat, the magnetic force lines are short. On the other hand, in the case of a thicker magnet, the force lines will be longer and extend over a greater distance.
For making the casings of magnetic separators - rollers, usually stainless steel is employed, especially types AISI 304, AISI 316, and AISI 316L.
In a salt water contact, type AISI 316 steel is recommended thanks to its excellent anti-corrosion properties.
Magnetic bars stand out for their specific arrangement of poles and their ability to attract magnetic particles directly onto their surface, as opposed to other devices that may utilize more complicated filtration systems.
Technical designations and terms pertaining to magnetic separators comprise among 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 close to the magnetic pole. The outcome is checked 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 a very strong magnetic field, the ability to capture even the tiniest metal particles, and durability. However, some of the downsides may involve the need for regular cleaning, higher cost, and potential installation challenges.
For proper maintenance of neodymium magnetic rollers, it is recommended {to clean them regularly from contaminants, avoid extremal temperatures above 80 degrees, and to clean them regularly, avoiding temperatures up to 80°C. The rollers have an IP67 waterproof rating, so if they are not watertight, the magnets inside may rust and lose their strength. Magnetic field measurements are advised to be conducted once every 24 months. Caution should be exercised during use as there is a possibility of finger injury. If the protective tube is only 0.5 mm thick, it can wear out, which, in turn, may lead to issues with the magnetic rod becoming unsealed and product contamination. The Roller operating range equals its diameter, fi25mm is approximately 25mm active range, while fi32 is about 40mm.

Compilation of suggested goods

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

  • They do not lose power over time. After approximately 10 years, their power decreases by only ~1% (theoretically),
  • They protect against demagnetization caused by external magnetic sources very well,
  • By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
  • They exhibit very high magnetic induction on the surface of the magnet,
  • Magnetic neodymium magnets are characterized by very high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
  • Thanks to the flexibility in shaping and the ability to adapt to specific requirements – neodymium magnets can be produced in many variants of shapes or sizes, which amplifies their universality in usage.
  • Wide application in the industry of new technologies – are used in HDD drives, electric motors, medical devices or various technologically advanced devices.

Disadvantages of neodymium magnets:

  • They are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts and at the same time increases its overall strength,
  • Magnets lose their strength due to exposure to high temperatures. In most cases, when the temperature exceeds 80°C, these magnets experience permanent reduction in strength (although it is worth noting that this is dependent on the form and size of the magnet). To avoid this problem, we offer special magnets marked with the [AH] symbol, which exhibit high temperature resistance. They can operate even at temperatures as high as 230°C or more,
  • Due to their susceptibility to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
  • The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
  • Possible danger associated with microscopic parts of magnets pose a threat, when accidentally ingested, which is crucial in the context of child safety. It's also worth noting that tiny parts of these devices have the potential to be problematic in medical diagnosis after entering the body.

Handle Neodymium Magnets with Caution

Neodymium magnets are the most powerful, most remarkable magnets on earth, and the surprising force between them can surprise you at first.

To handle magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets are noted for being fragile, which can cause them to become damaged.

Neodymium magnetic are fragile as well as will break 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. At the moment of collision between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Keep neodymium magnets away from GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Neodymium magnets can become demagnetized at high temperatures.

Even though magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

  Neodymium magnets should not be in the vicinity children.

Not all neodymium magnets are toys, so do not let children play with them. Small magnets pose a serious choking hazard or can attract to each other in the intestines. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

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.

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 around 10 cm from each other. Remember not to place fingers between magnets or alternatively in their path when they attract. Depending on how huge the neodymium magnets are, they can lead to a cut or a fracture.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

In order for you to know how powerful neodymium magnets are and why they are so dangerous, read the article - Dangerous very strong neodymium magnets.

Dhit sp. z o.o. logo

e-mail: bok@dhit.pl

tel: +48 888 99 98 98