tel: +48 22 499 98 98

neodymium magnets

We provide red color magnets Nd2Fe14B - our proposal. All magnesy in our store are in stock for immediate purchase (check the list). See the magnet price list for more details check the magnet price list

Magnets for treasure hunters F300 GOLD

Where to buy strong neodymium magnet? Holders with magnets in airtight, solid enclosure are perfect for use in difficult weather, including during snow and rain read

magnetic holders

Holders with magnets can be used to facilitate production processes, underwater exploration, or locating meteorites from gold more...

Shipping is always shipped on the day of purchase before 2:00 PM on business days.

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

SM 25x225 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130354

GTIN: 5906301813026

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

225 mm

Weight

0.01 g

688.80 with VAT / pcs + price for transport

560.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
560.00 ZŁ
688.80 ZŁ
price from 5 pcs
532.00 ZŁ
654.36 ZŁ
price from 10 pcs
504.00 ZŁ
619.92 ZŁ

Want to talk magnets?

Pick up the phone and ask +48 22 499 98 98 alternatively get in touch by means of request form through our site.
Weight as well as shape of a neodymium magnet can be reviewed using our magnetic mass calculator.

Orders submitted before 14:00 will be dispatched today!

SM 25x225 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x225 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130354
GTIN
5906301813026
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
225 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
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 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 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

It is the "heart" of every magnetic filter used in industry for cleaning raw materials. 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. Such construction ensures full resistance to corrosion, water, oils, and acids.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. For the food and precision industry, we recommend the highest induction parameters.
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. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of neodymium magnets.

Apart from their notable holding force, neodymium magnets have these key benefits:

  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets are characterized by extremely resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the shiny finish, the coating of Ni-Cu-Ni, gold, or silver gives an clean appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the ability of precise molding and customization to specialized projects, magnetic components can be created in a broad palette of shapes and sizes, which increases their versatility,
  • Fundamental importance in modern technologies – they find application in data components, drive modules, medical devices, as well as modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages of neodymium magnets:

  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating nuts and complex shapes in magnets, we propose using casing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The force parameter is a measurement result conducted under the following configuration:

  • with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • without the slightest clearance between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • at room temperature

Practical aspects of lifting capacity – factors

Bear in mind that the working load will differ influenced by the following factors, in order of importance:

  • Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was assessed using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets

ICD Warning

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

No play value

Neodymium magnets are not intended for children. Eating several magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.

Handling guide

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Magnetic media

Very strong magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Do not drill into magnets

Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Fragile material

Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them breaking into shards.

Bone fractures

Big blocks can crush fingers instantly. Never place your hand betwixt two strong magnets.

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and use protective gear.

Threat to navigation

A powerful magnetic field disrupts the functioning of compasses in phones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.

Operating temperature

Avoid heat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Attention!

More info about hazards in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98