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neodymium magnets

We provide yellow color magnets Nd2Fe14B - our store's offer. All "neodymium magnets" on our website are available for immediate purchase (see the list). Check out the magnet pricing for more details check the magnet price list

Magnet for water searching F400 GOLD

Where to buy powerful neodymium magnet? Holders with magnets in solid and airtight enclosure are excellent for use in difficult, demanding climate conditions, including during snow and rain see

magnets with holders

Magnetic holders can be used to improve manufacturing, exploring underwater areas, or locating meteorites from gold see...

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SM 32x125 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130357

GTIN: 5906301813057

0

Diameter Ø

32 mm [±1 mm]

Height

125 mm [±1 mm]

Weight

690 g

Magnetic Flux

~ 10 000 Gauss [±5%]

455.10 with VAT / pcs + price for transport

370.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
370.00 ZŁ
455.10 ZŁ
price from 10 pcs
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409.59 ZŁ

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Pick up the phone and ask +48 22 499 98 98 if you prefer let us know through form through our site.
Parameters along with structure of a neodymium magnet can be estimated using our online calculation tool.

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SM 32x125 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 32x125 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130357
GTIN
5906301813057
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
125 mm [±1 mm]
Weight
690 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 10 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 4 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±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

A magnetic rod is the basic element of building grate separators and magnetic filters. Its task is separation (separation) of metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). 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. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Pros and cons of NdFeB magnets.

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

  • Their magnetic field remains stable, and after around ten years it decreases only by ~1% (theoretically),
  • Magnets effectively resist against demagnetization caused by ambient magnetic noise,
  • By covering with a smooth coating of gold, the element has an nice look,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in forming and the capacity to modify to complex applications,
  • Versatile presence in innovative solutions – they are commonly used in mass storage devices, motor assemblies, precision medical tools, as well as technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages of NdFeB magnets:

  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited possibility of creating threads in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Detachment force of the magnet in optimal conditionswhat it depends on?

Breakaway force is the result of a measurement for ideal contact conditions, taking into account:

  • with the use of a sheet made of special test steel, guaranteeing maximum field concentration
  • with a cross-section no less than 10 mm
  • characterized by lack of roughness
  • without any insulating layer between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

It is worth knowing that the application force will differ depending on elements below, in order of importance:

  • Clearance – the presence of any layer (paint, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Material composition – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

* Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance {between} the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets

Permanent damage

Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Warning for allergy sufferers

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness appears, cease handling magnets and wear gloves.

Warning for heart patients

Patients with a pacemaker have to keep an absolute distance from magnets. The magnetic field can stop the operation of the implant.

GPS and phone interference

A strong magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Maintain magnets near a device to avoid breaking the sensors.

Do not underestimate power

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

Hand protection

Protect your hands. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Cards and drives

Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Do not give to children

Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.

Material brittleness

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets leads to them shattering into shards.

Do not drill into magnets

Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Danger!

Want to know more? Read our article: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98